Scientific publications

cv

TR

a)

In Journals

b)

Patents

c)

Others

(national publ, thesis, reports)

Important: The copyright of these papers belongs to the journal or publisher in each case. As such, while the papers can be accessed as PDF files (click on "pdf"), the online versions are for consultation

purposes only. The papers may not be reproduced, printed, copied or distributed in any form without the

permission of the appropriate copyright holder.

Sciencefood, international recipes, Helholtz Zentrum Berlin

PUBLICATIONS

213. Melt-Processable and Electrospinnable Shape-Memory Hydrogels.

T. Abdullah, C. Altınkok, O. Okay, Macromol. Mater. Eng. 2400166 (2024)

212. Mechanically Robust Shape-Memory Organohydrogels Based on Silk Fibroin with Organogel Microinclusions of Various Sizes.

Y. Bas, O. Okay, Macromol. Mater. Eng. 2300129 (2023)

211. Cryogelation reactions and cryogels: Principles and challenges.

O. Okay, Turk. J. Chem. 47, 910-926 (2023)

210. Effects of Cryogenic Condition and Chemistry on the Properties of Synthetic and Biopolymer Cryogels.

G. Doser, E. Su, O.Okay, React. Funct. Polym. 190, 105635 (2023)

209. Silk Fibroin Based Shape-Memory Organohydrogels with Semicrystalline Microinclusions.

C. B. Oral, B. Yetiskin, C. Cil, F. N. Kok, O. Okay. ACS Appl. Bio Mater. 6, 1594-1603 (2023)

208. 4D Printing of Body Temperature-Responsive Hydrogels Based on Polyacrylic Acid with Shape-Memory and Self-Healing Abilities.

T. Abdullah, O. Okay. ACS Appl. Bio Mater. 6, 703-711 (2023)

207. Mechanically Strong Superabsorbent Terpolymer Hydrogels Based on AMPS via Hydrogen-Bonding Interactions.

B. Sekizkardes, E. Su, O. Okay. ACS Appl. Polym. Mater. 5, 2043−2050 (2023)

206. Roadmap to Design Mechanically Robust Copolymer Hydrogels Naturally Cross-Linked by Hydrogen Bonds.

C. Erkoc, E. Yildirim, M. Yurtsever, O. Okay, Macromolecules 55, 10576–10589 (2022)

205. Sterilization studies of hydrogel nanocomposites designed for possible biomedical applications before in vivo research.

G. B. Sekitmen, E. Su, S. D. Gür, S. Ide, O. Okay, React. Funct. Polym. 180, 105393 (2022)

204. Photocurable Methacrylated Silk Fibroin/Hyaluronic Acid Dual Macrocrosslinker System Generating Extracellular Matrix-Inspired Tough and Stretchable Hydrogels.

B. Yetiskin, B. Tavsanli, O. Okay, Macromol. Mater. Eng. 2200334 (2022)

203. A silk fibroin cryogel building adaptive organohydrogels with switching mechanics and viscoelasticity.

B. Yetiskin, O. Okay, ACS Appl. Polym. Mater. 4, 7, 5234–5245 (2022)

202. Polycyclic aromatic hydrocarbon accumulation performances of monophasic butyl rubber passive samplers.

O. E. Tureyen, S. D. Yakan, A. Yilmaz, B. Yetiskin, O. Okay, O. S. Okay, Environ. Process. 9, 34 (2022)

201. Butyl rubber as a macro-cross-linker in the preparation of a shape-memory and self-healing polymer. .

B.Tavsanli, C. Bilici, P. Sungur, S. Ide, O. Okay, J. Rheo. 66, 1367-1378 (2022)

200. Surface modification of graphene oxide for preparing self-healing nanocomposite hydrogels. .

E. B. Ceper, E. Su, O. Okay, O. Güney, Polym. Adv. Technol. 33, 2276-2288 (2022)

199. Butyl rubber-based interpenetrating polymer networks with side chain crystallinity: Self-healing and shape-memory polymers with tunable thermal and mechanical properties.

E. Su, G. Bayazit, S. Ide, O. Okay, Eur. Polym. J. l68, 111098 (2022)

198. Shape-memory semicrystalline interconnected IPNs based on various rubbers.

O. Akca, O. Okay, Macromol. Mater. Eng. 307, 2100776 (2022)

197. Bisphosphonate-functionalized poly(amido amine) crosslinked 2-hydroxyethyl methacrylate hydrogel as tissue engineering scaffold .

M. N. Guven, B. Balaban,, G. Demirci, H. Y. Acar, O. Okay, D. Avci, Eur. Polym. J. 159, 110732 (2021).

196. “Reentrant Conformation Transition in Hydrogels”

O. Okay, Gels 7, 98 (2021).

195. “Solvent-free UV polymerization of n-octadecyl acrylate in butyl rubber: A simple way to produce tough and smart polymeric materials at ambient temperature”

E. Su, C. Bilici, G. Bayazit, S. Ide, O. Okay, ACS Appl. Mater. Interfaces 13, 21786–21799 (2021)

194. “Behaviors of quenched polyampholytes in solution and gel state”

S. E. Kudaibergenov, O. Okay, Polym. Polym Adv Technol. 32, 2639–2654 (2021) (

)

193. “Performance of butyl rubber-based macroporous sorbents as passive samplers”

O. E. Tureyen, A. Yilmaz, S. D. Yakan, B. Yetiskin, O. Okay, O. S. Okay, Environ. Sci. Poll. Res. 28, 3766–3773 (2021)

192. “How to design both mechanically strong and self-healable hydrogels?”

O. Okay, Adv. Polym. Sci. 285, 21-62 (2020)

191. “Self-healing and shape-memory hydrogels”

O. Okay, HJBC 48, 507-525 (2020)

190. “Stretchable silk fibroin hydrogels”

C. B. Oral, B. Yetiskin, O. Okay, Int. J. Bio. Macromol. 161, 1371-1380 (2020)

189. “Alendronate-functionalized poly(amido amine) cryogels of high-toughness for biomedical applications”

M. N. Guven, G. Demirci, S. Altuncu, U. Gulyuz, O. Okay, H.Y. Acar, D. Avci, Polymer 190, 122248, 1-11 (2020)

188. “Highly stretchable and thermally healable polyampholyte hydrogels via hydrophobic modification”

G. Toleutay, E. Su, S. Kudaibergenov, O. Okay, Colloid Polym. Sci. 298, 273-284 (2020)

187. Preparation of dextran cryogels for separation processes of binary dye and pesticide mixtures from aqueous solutions. B. Ari, B. Yetiskin, O. Okay, N. Sahiner, Polym. Eng. Sci. 60, 1890-1901 (2020)

186. “Macroporous hyaluronic acid cryogels of high mechanical strength and flow-dependent viscoelasticity”

B. Tavsanli, O. Okay, Carbohyd. Polym. 229, 115458, 1-10 (2020)

185. “Hydrophobically modified nanocomposite hydrogels with self-healing ability”

O. Akca, B. Yetiskin, O. Okay, J. Appl. Polym. Sci 137, 48853, 1 - 8 (2020)

184. “Single-, double-, and triple-network macroporous rubbers as a passive sampler”

B. Yetiskin, O. E. Tureyen, A. Yilmaz, S. D. Yakan, O. S. Okay, O. Okay, ACS Appl. Mater. Interfaces 11, 28317−28326 (2019)

183. “A self-healing and highly stretchable polyelectrolyte hydrogel via cooperative hydrogen-bonding as a superabsorbent polymer”

E. Su, M. Yurtsever, O. Okay, Macromolecules 52, 3257-3267 (2019)

182. “One-step injectable and bioreducible poly(β-amino ester) hydrogels as controlled drug delivery platform”

H. B. Bingol, M. S. Altuncu, F. D. Demir, A. Ak, U. Gulyuz, H. Y. Acar, O. Okay, D. Avci, ACS Appl. Polym. Mater. 1, 1724−1734 (2019)

181. “Cryogenic formation-structure-property relationships of poly(2-acrylamido-2-methyl-1-propanesulfonic acid) cryogels”

E. Su, O. Okay, Polymer 178, 121603, 1-9 (2019)

180. “Cryogel composites based on hyaluronic acid and halloysite nanotubes as scaffold for tissue engineering”

S. S. Suner, S. Demirci, B. Yetiskin, R. Fakhrullin, E. Naumenko, O. Okay, R. S. Ayyala, N. Sahiner, Int. J. Bio. Macromol. 130, 627–635 (2019)

179. “Semicrystalline physical hydrogels with shape-memory and self-healing properties”

O. Okay, J. Mater. Chem. B. 7, 1581-1596 (2019)

178. “Mechanically robust and stretchable silk/hyaluronic acid hydrogels”

B. Tavsanli, O. Okay, Carbohyd. Polym. 208, 413-420 (2019)

177. “Structure-property relationships of novel phosphonate-functionalized networks and gels of poly (b-amino esters)”

S. Altuncu, F. D. Duman, U. Gulyuz, H. Y. Acar, O. Okay, D. Avci, Eur. Polym. J. 113, 155-164 (2019)

176. “Highly-Stretchable and Rapid Self-Recoverable Cryogels Based on Butyl Rubber as Reusable Sorbents”

S. Muslumova, B. Yetiskin, O. Okay, Gels 5, 1 (2019)

175. “Semi-crystalline, three-segmented hybrid gels with multiple shape memory effect”

A. Argun, U. Gulyuz, O. Okay, Macromol. Symp. 385, 1800164 (2019)

174. “High-strength and self-recoverable silk fibroin cryogels with anisotropic swelling and mechanical properties”

B. Yetiskin, O. Okay, Int. J. Bio. Macromol. 122, 1279-1289 (2019)

173. “Monitoring the instant creation of a new fluorescent signal for evaluation of DNA conformation based on intercalation complex”

A. T. Uzumcu, O. Guney, O. Okay, J. Fluoresc. 28, 1325-1332 (2018)

172. “Bisphosphonic acid functionalized crosslinkers to tailor hydrogel properties for biomedical applications”

M.N. Guven, M.S. Altuncu, T. Bal, D. Oran, U. Gulyuz, S. Kizilel, O. Okay, D. Avci,

ACS Omega, 3, 8638–8647 (2018)

171. “Toughness improvement and anisotropy in semicrystalline physical hydrogels”

C. Bilici, D. Karaarslan, S. Ide, O. Okay, Polymer 151, 208–217 (2018) ,

170. “Interfacing soft and hard materials with triple-shape-memory and self-healing functions”

A. Argun, U. Gulyuz, O. Okay, Macromolecules 51, 2437-2446 (2018)

169. “Highly stretchable DNA/clay hydrogels with self-healing ability”

A. T. Uzumcu, O. Guney, O. Okay, ACS Appl. Mater. Interfaces 10, 8296-8306 (2018)

168. “Hybrid cross-linked poly(2-acrylamido-2-methyl-1-propanesulfonic acid) hydrogels with tunable viscoelastic, mechanical and self-healing properties”

E. Su, O. Okay, React. Funct. Polym. 123, 70-79 (2018)

167. “Cryogelation within cryogels: Silk fibroin scaffolds with single-, double- and triple-network structures”

B. Yetiskin, C. Akinci, O. Okay, Polymer 128, 47-56 (2017)

166. “Mechanically strong hyaluronic acid hydrogels with an interpenetrating network structure”

B. Tavsanli, O. Okay, Eur. Polym. J. 90, 185-195 (2017)

165. “Yielding behavior of tough semicrystalline hydrogels”

C. Bilici, S. Ide, O. Okay, Macromolecules 50, 3647-3654 (2017)

164. “High-strength silk fibroin scaffolds with anisotropic mechanical properties”

B. Yetiskin, O. Okay, Polymer 112, 61-70 (2017)

163. “Polyampholyte hydrogels formed via electrostatic and hydrophobic interactions”

E. Su, O. Okay, Eur. Polym. J. 88, 191-204 (2017)

162. “Reversibility of strain stiffening in silk fibroin gels”

Z. Oztoprak, O. Okay. Int. J. Bio. Macromol. 95, 24-31 (2017)

161. “Nanocomposite DNA hydrogels with temperature sensitivity”

A. T. Uzumcu, O. Guney, O. Okay. Polymer 100, 169-178 (2016)

160. “Preparation and fracture process of high strength hyaluronic acid hydrogels cross-linked by ethylene glycol diglycidyl ether”

B. Tavsanli, O. Okay. React. Funct. Polym. 109, 42-51 (2016)

159. “Melt-processable shape-memory hydrogels with self-healing ability of high mechanical strength”

C. Bilici, V. Can, U. Nöchel, M. Behl, A. Lendlein, O. Okay. Macromolecules 49, 7442-7449 (2016)

158. “High-strength semi-crystalline hydrogels with self-healing and shape memory functions”

B. Kurt, U. Gulyuz, D. D. Demir, O. Okay, Eur. Polym. J. 81, 12-23 (2016)

157. “Nanostructural Evolution and Self-Healing Mechanism of Micellar Hydrogels”

V. Can, Z. Kochovski, V. Reiter, N. Severin, M. Siebenbürger, B. Kent, J. Just, J. P. Rabe, M. Ballauff, O. Okay Macromolecules 49, 2281-2287 (2016)

156. “Self-Healing Poly(acrylic acid) Hydrogels: Effect of Surfactant”

U. Gulyuz, O. Okay, Macromol. Symp. 358, 232–238 (2015)

155. “Mechanically strong triple network hydrogels based on hyaluronan and poly(N,N-dimethylacrylamide)”

B. Tavsanli, V. Can, O. Okay, Soft Matter 11, 8517-8524 (2015)

154. “Self-healing poly(N-isopropylacrylamide) hydrogels”

U. Gulyuz, O. Okay, Eur. Polym. J. 72, 12-22 (2015)

153. “Self-healing hydrogels formed via hydrophobic interactions”

O. Okay, Adv. Polym. Sci. 268,101-142 (2015)

152. “Preparation and physical properties of hyaluronic acid-based cryogels”

A. Strom, A. Larsson, O. Okay, J. Appl. Polym. Sci. 132, 42194 (2015)

151. “Self-healing poly(acrylic acid) hydrogels with shape memory behavior of high mechanical strength”

U. Gulyuz, O. Okay, Macromolecules 47, 6889-6899 (2014)

150. “Non-ionic double and triple network hydrogels of high mechanical strength”

A. Argun, V. Can, U. Altun, O. Okay, Macromolecules 47, 6430-6440 (2014)

149. “Synthesis and structure–property relationships of cryogels”

O. Okay, V. I. Lozinsky, Adv. Polym. Sci. 263, 103-157 (2014)

148. “Basic principles of cryotropic gelation”

V. I. Lozinsky, O. Okay, Adv. Polym. Sci. 263, 49-101 (2014)

147. “Highly stretchable self-healing poly(N,N-dimethylacrylamide) hydrogels”

M. P. Algi, O. Okay, Eur. Polym. J. 59, 113-121 (2014)

146. “Porous rubber cryogels: effect of the gel preparation temperature”

Z. Oztoprak, T. Hekimoglu, I. Karakutuk, D. C. Tuncaboylu, O. Okay, Polym. Bull. 71, 1983-1990 (2014)

145. “Surfactant-induced healing of tough hydrogels formed via hydrophobic interactions”

A. Argun, M. P. Algi, D. C. Tuncaboylu, O. Okay, Colloid Polym. Sci. 292, 511-517 (2014)

144. “Autonomic self-healing in covalently crosslinked hydrogels containing hydrophobic domains”

D. C. Tuncaboylu, A. Argun, M. P. Algi, O. Okay, Polymer 54 (23), 6381-6388 (2013)

143. “Self-healing polyacrylic acid hydrogels”

U. Gulyuz, O. Okay, Soft Matter 9 (43), 10287-10293 (2013)

142. “Shape memory hydrogels via micellar copolymerization of acrylic acid and n-octadecyl acrylate in aqueous media”

C. Bilici, O. Okay, Macromolecules 46, 3125-3131 (2013)

141. “Tough interpenetrating Pluronic F127/polyacrylic acid hydrogels”

T. Baskan, D.C. Tuncaboylu, O. Okay, Polymer 54, 2979-2987 (2013)

140. “Macroporous silk fibroin cryogels.”

F. Ak, Z. Oztoprak, I. Karakutuk, O. Okay, Biomacromolecules 14, 719-727 (2013)

139. “Self-healing hydrogels formed in catanionic surfactant solutions.”

G. Akay, A. Hassan-Raeisi, D.C. Tuncaboylu, N. Orakdogen, S. Abdurrahmanoglu, W. Oppermann, O. Okay, Soft Matter 9, 2254-2261 (2013)

138. “Swelling behavior of physical and chemical DNA hydrogels.”

P. Karacan P, H. Cakmak, O. Okay, J. Appl. Polym. Sci. 128, 3330-3337 (2013)

137. “Ethidium bromide binding to DNA cryogels.”

P. Karacan, O. Okay, React. Funct. Polym. 73, 442-450 (2013)

136. “Structure optimization of self-healing hydrogels formed via hydrophobic interactions.”

D. C. Tuncaboylu, A. Argun, M. Sahin, M. Sari, O. Okay, Polymer 53 (24), 5513-5522 (2012)

135. “Dynamics and large strain behavior of self-healing hydrogels with and without surfactants.”

D. C. Tuncaboylu, M. Sahin, A. Argun, W. Oppermann, O. Okay, Macromolecules 45 (4), 1991-2000 (2012)

134. “Diepoxide-triggered conformational transition of silk fibroin: Formation of hydrogels.”

I. Karakutuk, F. Ak, O. Okay, Biomacromolecules 13 (4), 1122-1128 (2012)

133. “Tough and self-healing hydrogels formed via hydrophobic interactions.”

D. C. Tuncaboylu, M. Sarı, W. Oppermann, O. Okay, Macromolecules 44, 4997-5005 (2011)

132. “Macroporous, responsive DNA cryogel beads.”

N. Orakdogen, P. Karacan, O. Okay, React. Funct. Polym. 71, 782-790 (2011)

131. “DNA hydrogels: New functional soft materials.”

O. Okay, J. Polym. Sci. B: Polymer Phys. 49, 551-556 (2011)

130. “Solution cross-linked natural rubber (NR) / clay aerogel composites.”

T. Pojanavaraphan, L. Liu, D. Ceylan, O. Okay, R. Magaraphan, D. A. Schiraldi, Macromolecules 44, 923-931 (2011)

129. “Dodecyl methacrylate as a crosslinker in the preparation of tough polyacrylamide hydrogels.”

S. Abdurrahmanoglu, M. Cilingir, O. Okay, Polymer 52, 694-699 (2011)

128. “Self-oscillating pH-responsive cryogels as possible candidates of soft materials for generating mechanical energy”

C. Bilici, S. Karayel, T.T. Demir, O. Okay, J. Appl. Polym. Sci. 118, 2981-2988 (2010)

127. “Macroporous rubber gels as reusable sorbents for the removal of oil from surface waters”

I. Karakutuk, O. Okay, React. Funct. Polym. 70, 585-595 (2010)

126. “Evidence of strain hardening in DNA gels”

N. Orakdogen, B. Erman, O. Okay, Macromolecules 43 (3), 1530-1538 (2010)

125. “Effect of nanoscale interactions on the rheological behavior of polymer – clay nanocomposite hydrogels”

S. Abdurrahmanoglu, O. Okay, J. Appl. Polym. Sci. 116, 2328-2335 (2010)

124. “Hierarchically macroporous cryogels of polyisobutylene and silica nanoparticles”

D.C. Tuncaboylu, O. Okay, Langmuir 26 (10), 7574–7581 (2010)

123. “Design of high-toughness polyacrylamide hydrogels by hydrophobic modification”

S. Abdurrahmanoglu, V. Can, O. Okay, Polymer 50, 5449-5455 (2009)

122. “Formation of hydrogels by simultaneous denaturation and cross-linking of DNA”

F. Topuz, O. Okay, Biomacromolecules 10, 2652-2661 (2009)

121. “Preparation and characterization of single-hole macroporous organogel particles of high toughness and superfast responsivity”

D.C. Tuncaboylu, O. Okay O, Eur. Polym. J. 45 (7), 2033-2042 (2009)

120. “Evaluation of butyl rubber as sorbent material for the removal of oil and polycyclic aromatic hydrocarbons from seawater”

D. Ceylan, S. Dogu, B.Karacik, S.D. Yakan, O.S. Okay, O. Okay, Environ. Sci. Technol. 43 (10), 3846-3852 (2009)

119. “Macroporous hydrogel beads of high toughness and superfast responsivity”

F. Topuz, O. Okay, React. Funct. Polym. 69, 273-280 (2009)

118. “Collapse of acrylamide-based polyampholyte hydrogels in water”

S. Dogu, M. Kilic, O. Okay, J. Appl. Polym. Sci. 113, 1375-1382 (2009)

117. “Rheological behavior of responsive DNA hydrogels”

F. Topuz, O. Okay, Macromolecules 41, 8847-8854 (2008)

116. “Homogeneous poly(acrylamide) hydrogels made by large size, flexible dimethacrylate crosslinkers”

S. Abdurrahmanoglu, O. Okay, Macromolecules 41, 7759-7761 (2008)

115. “Tough organogels based on polyisobutylene with aligned porous structures”

S. Dogu, O. Okay, Polymer 49, 4626-4634 (2008)

114. “Formation of macroporous poly(acrylamide) hydrogels in DMSO/water mixture: Transition from cryogelation to phase separation copolymerization”

M. M. Ozmen, O. Okay, React. Funct. Polym 68, 1467-1475 (2008)

113. “Preparation of Homogeneous Hydrogels by Controlling the Crosslinker Reactivity and Availability”

S. Abdurrahmanoglu, O. Okay, J. Macromol. Sci. A: Pure and Appl. Chem. 45, 769-775 (2008)

112. “Equilibrium swelling behavior and elastic properties of polymer-clay nanocomposite hydrogels”

S. Abdurrahmanoglu, V. Can, O. Okay, J. Appl. Polym. Sci. 109, 3714-3724 (2008)

111. “Preparation of macroporous poly(acrylamide) hydrogels in DMSO/water mixture at subzero temperatures“

M.M. Ozmen, M.V. Dinu, O. Okay, Polymer Bull. 60, 169-180 (2008)

110. “Macroporous polyisobutylene gels: A novel tough organogel with superfast responsivity”

D. Ceylan, O. Okay, Macromolecules 40, 8742-8749 (2007)

109. “Unusual swelling behavior of polymer-clay nanocomposite hydrogels”

V. Can, S. Abdurrahmanoglu, O. Okay, Polymer 48, 5016-5023 (2007)

108. “Preparation of homogeneous polyacrylamide hydrogels by free-radical crosslinking copolymerization”

E. A. Kuru, N. Orakdogen, O. Okay, Eur. Polym. J. 43, 2913-2921 (2007)

107. “Preparation of Macroporous Acrylamide-based Hydrogels: Cryogelation under Isothermal Conditions”

M. M. Ozmen, M. V. Dinu, E. S. Dragan, O. Okay, J. Macromol. Sci. A: Pure and Appl. Chem. 44, 1195-1202 (2007)

106. “Polyacrylamide - clay nanocomposite hydrogels: Rheological and light scattering characterization”

O. Okay, and W. Oppermann, Macromolecules 40, 3378-3387 (2007)

105. “Influence of the initiator system on the spatial inhomogeneity in acrylamide-based hydrogels”

N. Orakdogen N, and O. Okay, J. Appl. Polym. Sci. 103, 3228-3237 (2007)

104. “Freezing as a path to built macroporous structures: Superfast responsive polyacrylamide hydrogels”

M. V. Dinu, M. M. Ozmen, E. S. Dragan, and O. Okay, Polymer 48, 195-204 (2007)

103. “Network Development in Mixed Step-Chain Growth Thiol-Vinyl Photopolymerizations”

S.K. Reddy, O. Okay, and C.N. Bowman, Macromolecules 39, 8832-8843 (2006)

102. “Correlation between crosslinking efficiency and spatial inhomogeneity in poly(acrylamide)hydrogels”

N. Orakdogen, and O. Okay, Polymer Bulletin 57, 631-641 (2006)

101. “Superfast responsive ionic hydrogels: Effect of the monomer concentration”

M.M. Ozmen, and O. Okay, J. Macromol. Sci. A: Pure and Appl. Chem. 43, 1215-1225 (2006)

100. “Phase transition of acrylamide-based polyampholyte gels in water”

D. Ceylan, V. Can, and O. Okay, J. Macromol. Sci. A: Pure and Appl. Chem. 43, 1635-1649 (2006)

99. “Swelling-deswelling kinetics of poly(acrylamide) hydrogels and cryogels”

D. Ceylan, M.M. Ozmen, and O. Okay, J. Appl. Polym. Sci. 99, 319-325 (2006)

98. “Effect of initial monomer concentration on the equilibrium swelling and elasticity of hydrogels”

N. Orakdogen, and O. Okay, Eur. Polym. J. 42 (2006)

97. “Swelling-deswelling kinetics of poly(N-isopropylacrylamide) hydrogels formed in PEG solutions”

Y. Dogu, and O. Okay, J. Appl. Polym. Sci. 99, 37-44 (2006)

96. “Reentrant conformation transition in poly(N,N-dimethylacrylamide) hydrogels in water-organic solvent mixtures”

N. Orakdogen, and O. Okay, Polymer 47, 561-568 (2006)

95. “Suppression of inhomogeneities in hydrogels formed by free-radical crosslinking copolymerization”

N. Orakdogen, M.Y. Kizilay, and O. Okay, Polymer 46, 11407-11415 (2005)

94. “Superfast responsive ionic hydrogels with contrallable pore size”

M.M. Ozmen, and O. Okay, Polymer 46, 8119-8127 (2005)

93. “Shake gels based on Laponite-PEO mixtures: Effect of polymer molecular weight”

V. Can, and O. Okay, Designed Monomers Polymers 8, 453-462 (2005)

92. “Molecular weight development during thiol-ene photopolymerizations”

O. Okay, S.K. Reddy, and C.N. Bowman, Macromolecules 38, 4501-4511 (2005)

91. “Kinetic modeling of thiol-ene reactions with both step and chain growth aspects”

O. Okay, and C.N. Bowman, Macromol. Theory Simul. 14, 267-277 (2005)

90. “Spatial inhomogeneity in poly(acrylic acid) hydrogels”

Yazici, and O. Okay, Polymer 46, 2595-2602 (2005)

89. “Effect of spatial gel inhomogeneity on the elastic modulus of strong polyelectrolyte hydrogels”

Ozdogan, and O. Okay, Polymer Bull. 54, 435-442 (2005)

88. “Non-Gaussian elasticity of poly(2-acrylamido-2-methylpropane sulfonic acid) gels”

M.M. Ozmen, and O. Okay, Polymer Bull. 52, 83-90 (2004)

87. “Swelling, elasticity and spatial inhomogeneity of poly(N,N-dimethylacrylamide) hydrogels formed at various polymer concentrations”

N. Gundogan, O. Okay and W. Oppermann, Macromol. Chem. Phys. 205, 814-823 (2004)

86. “Effect of swelling on spatial inhomogeneity in poly(acrylamide) gels formed at various monomer concentrations”

M.Y. Kızılay, and O. Okay, Polymer 45, 2576-2576 (2004)

85. “Swelling and elasticity of poly(N-isopropylacrylamide-co-4-vinylbenzenesulfonic acid sodium salt) hydrogels”

N. Gundogan, D. Melekaslan, and O. Okay, J. Appl. Polym. Sci. 94, 135-141 (2004)

84. “Minimization of spatial inhomogeneity in polystyrene gels formed by free-radical mechanism”

H. Cerid, and O. Okay, Eur. Polym. J. 40, 579-587 (2004)

83. “Swelling and elasticity of hydrogels based on a poly(ethylene oxide) macroinimer”

D. Melekaslan, F. Kasapoglu, K. Ito, Y. Yagci, and O. Okay, Polymer International 53, 237-242 (2004)

82. “Non-Gaussian elasticity of swollen poly(N-isopropylacrylamide) gels at high charge densities”

N. Gundogan, D. Melekaslan, and O. Okay, Eur. Polym. J. 39, 2209-2216 (2003)

81. “Effect of hydrolysis on spatial inhomogeneity in poly(acrylamide) gels of various crosslink densities”

M.Y. Kızılay, and O. Okay, Polymer 44, 5239-5250 (2003)

80. “Elasticity of poly(acrylamide) gel beads”

D. Melekaslan, N. Gundogan, and O. Okay, Polymer Bull. 50, 287-294 (2003)

79. “Swelling behavior of strong polyelectrolyte poly(N-t-butyl acrylamide-co-acrylamide) hydrogels”

M.M. Ozmen, and O. Okay, Eur. Polym. J. 39, 877-886 (2003)

78. “Effect of initial monomer concentration on spatial inhomogeneity in poly(acrylamide) gels”

M.Y. Kızılay, and O. Okay, Macromolecules 36, 6856-6862 (2003)

77. “Swelling and elasticity of poly(N-isopropylacrylamide) gels immersed in the melt of poly(ethylene glycol) chains”

D. Melekaslan, N. Gundogan, and O. Okay, Polymer 44, 2281-2288 (2003)

76. “Temperature dependent swelling behavior of ionic poly(N-isopropylacrylamide) gels in PEG solutions”

D. Melekaslan, and O. Okay, Polymer Bull. 49, 181-188 (2002)

75. “Temperature sensitive poly(N-t-butyl acrylamide-co-acrylamide) hydrogels: synthesis and swelling behavior”

V. Ozturk, and O. Okay, Polymer 43, 5017-5026 (2002)

74. “Rubber elasticity of poly(N-isopropylacrylamide) gels at various charge densities”

N. Gundogan, D. Melekaslan, and O. Okay, Macromolecules 35, 5616-5622 (2002)

73. “Macroporous poly(N-isopropylacrylamide) networks”

C. Sayil, and O. Okay, Polymer Bull. 48, 499-506 (2002)

72. “Swelling and mechanical properties of solution crosslinked poly(isobutylene) gels”

S. Durmaz, S. Fank, and O. Okay, Macromol. Chem. Phys. 203, 663-672 (2002)

71. “Real time temperature and photon transmission measurements for monitoring phase separation during the formation of poly(N-isopropylacrylamide) gels”

S. Kara, O. Okay, and O. Pekcan, J. Appl. Polym. Sci. 86, 3589- 3595 (2002)

70. “Volume phase transition of polymer networks in polymeric solvents”

O. Okay, and N. Gundogan, Macromol. Theory Simul. 11, 287-292 (2002)

69. “Reentrant phase transition of poly(N-isopropylacrylamide) gels in polymer solutions: Thermodynamic analysis”

N. Gundogan, and O. Okay, J. Appl. Polym. Sci. 85, 801-813 (2002)

68. “Charge density dependence of elastic modulus of strong polyelectrolyte hydrogels”

O. Okay, and S. Durmaz, Polymer 43, 1215-1221 (2002)

67. “Swelling-shrinking hysteresis of poly(N-isopropyl)acrylamide) gels in sodium dodecylbenzenesulfonate solutions”

C. Sayil, and O. Okay, J. Appl. Polym. Sci. 83, 1228-1232 (2002)

66. “Inhomogeneities in poly(acrylamide) gels: Position-dependent elastic modulus measurements”

S. Durmaz, and O. Okay, Polymer Bull. 46, 409 - 418 (2001)

65. “Macroporous poly(N-isopropyl) acrylamide networks: Formation conditions”

C. Sayil, and O. Okay, Polymer 42, 7639 - 7652 (2001)

64. “Elastic behavior of solution crosslinked poly(isobutylene) gels under large compression”

M.N. Ince, B. Erman, O. Okay, and S. Durmaz, Polymer 42, 3771-3777 (2001)

63. “Reentrant phase transition of strong polyelectrolyte poly(N-isopropylacrylamide) gels in PEG solutions”

D. Melekaslan, and O. Okay, Macromol. Chem. Phys. 202,304 - 312 (2001)

62. “In situ photon transmission technique for monitoring phase separation in real time during gelation”

S. Kara, O. Okay, and O. Pekcan, Polymer Bull. 45, 281-285 (2000)

61. “The effect of preparation temperature on the swelling behavior of poly(N-isopropylacrylamide) gels”

C. Sayil, and O. Okay, Polymer Bull. 45, 175-182 (2000)

60. “Swelling of strong polyelectrolyte hydrogels in polymer solutions: Effect of ion pair formation on the polymer collapse”

D. Melekaslan, and O. Okay, Polymer 41, 5737-5747 (2000)

59. “Macroporous Copolymer Networks”

O. Okay, Progress in Polymer Science 25, 711-779 (2000)

58. “Solution crosslinked poly(isobutylene) gels: synthesis and swelling behavior”

O. Okay, S. Durmaz, and B. Erman, Macromolecules 33, 4822-4827 (2000)

57. “Acrylamide / 2-acrylamido- 2- methyl propane sulfonic acid sodium salt -based hydrogels: Synthesis and characterization”

S. Durmaz, and O. Okay, Polymer 41, 3693-3704 (2000)

56. “Gel growth in free-radical crosslinking copolymerization: Effect of inactive gel radicals”

O. Okay, Macromol. Theory Simul. 9, 354-361 (2000)

55. “Phase separation during the formation of poly(acrylamide) hydrogels”

S. Durmaz, and O. Okay, Polymer 41, 5729-5735 (2000)

54. “Swelling Behavior of Poly(acrylamide-co-sodium acrylate) Hydrogels in Aqueous Salt Solutions: Theory versus Experiments”

O. Okay, and S.B. Sariisik, Eur. Polym. J. 36, 393-399 (2000)

53. “Heterogeneities during the formation of poly(sodium acrylate) hydrogels”

O. Okay, Y. Yilmaz, D. Kaya, M. Keskinel, and O. Pekcan, Polymer Bull. 43, 425-431 (1999)

52. “Observation of critical opalescence in free radical crosslinking copolymerization of styrene and divinylbenzene by fluorescence method”

O. Pekcan, D. Kaya, and O. Okay, Eur. Polym. J. 35, 2025-2029 (1999)

51. “Formation of Macroporous Styrene - Divinylbenzene Copolymer Networks: Theory versus Experiments”

O. Okay, J. Appl. Polym. Sci. 74, 2181-2195 (1999)

50. “Free-radical Crosslinking Copolymerization of Styrene and Divinylbenzene: Real Time Monitoring of the Gel Effect Using Fluorescence Probe”

O. Okay, D. Kaya, and O. Pekcan, Polymer 40, 6179-6187 (1999)

49. “Phase Separation in Free-Radical Crosslinking Copolymerization: Formation of Heterogeneous Polymer Networks”

O. Okay, Polymer 40, 4117-4129 (1999)

48. “Pore memory of Macroporous Styrene -Divinylbenzene Copolymer Beads”

E. Erbay, and O. Okay, J. Appl. Polym. Sci. 71, 1055-1062 (1999)

47. “Macroporous Styrene - Divinylbenzene Copolymers: Formation of Stable Porous Structures during the Copolymerization”

E. Erbay, and O. Okay, Polymer Bull. 41, 379-385 (1998)

46. “Swelling Behavior of Anionic Acrylamide-based Hydrogels in Aqueous Salt Solutions: Comparison of Experiment with Theory”

O. Okay, S.B. Sariisik, and S.D. Zor, J. Appl. Polym. Sci. 70, 567-575 (1998)

45. “Heterogeneities in polyacrylamide gels immersed in acetone- water mixtures”

O. Okay, and U. Akkan, Polymer Bull. 41, 363-370 (1998)

44. “Swelling of polyacrylamide gels in polyacrylamide solutions”

N. Kayaman, O. Okay, and B.M. Baysal, J. Polym. Sci., Polym. Phys. Ed., 36, 1313-1320 (1998)

43. “Effects of Cyclization and Electrostatic Interactions on the Termination Rate of Macroradicals in Free-Radical Crosslinking Copolymerization”

M. Keskinel, and O. Okay, Polymer Bull. 40, 491- 498 (1998)

42. “Microgels- intramolecularly crosslinked macromolecules with a globular structure”

W. Funke, O. Okay, and B. Joos-Muller, Advances in Polymer Science 136,139-234 (1998)

41. “Structure and protein separation efficiency of poly(N-isopropylacrylamide) gels: Effect of synthesis conditions”

N. Kayaman, D. Kazan, A. Erarslan, O. Okay, and B.M. Baysal, J. Appl. Polym. Sci. 67, 805-814 (1998).

40. "Phase transition of hydrolyzed polyacrylamide gels in PEG solutions"

N. Kayaman, O. Okay, and B.M. Baysal, Turk. J. Chem. 21, 346-352 (1997)

39. “Effects of cyclization and pendant vinyl group reactivity on the swelling behavior of polyacrylamide gels”

O. Okay, N.K. Balimtas, and H.J. Naghash, Polymer Bull. 39, 233-239 (1997)

38. “Swelling of polyacrylamide gels in aqueous solutions of ethylene glycol oligomers”

N. Kayaman, O. Okay, and B.M. Baysal, Polymer Gels and Networks 5, 339-356 (1997)

37. “Real time monitoring of polymerization rate of methyl methacrylate using fluorescence probe”

O. Pekcan, Y. Yilmaz, and O. Okay, Polymer 38, 1693-1698 (1997)

36. “Gel formation by chain crosslinking photopolymerization of methyl methacrylate and ethylene glycol dimethacrylate”

H.J. Naghash, O. Okay, and Y. Yagci, Polymer 38, 1187-1196 (1997)

35. “Phase transition of polyacrylamide gels in PEG solutions”

N. Kayaman, O. Okay, and B.M. Baysal, Polymer Gels and Networks 5, 167-184 (1997)

34. “Critical properties for gelation in free-radical crosslinking polymerization”

O. Okay, Turk. J. Phys. 20, 27-32 (1996)

33. “Determination of reaction activation energy during gelation in free-radical crosslinking copolymerization using the steady-state fluorescence method”

O. Pekcan, Y. Yilmaz, and O. Okay, J. Appl. Polym. Sci. 61, 2279-2284 (1996)

32. “Size distribution of polymers during the photoinitiated free-radical copolymerization of methyl methacrylate and ethylene glycol dimethacrylate”

H.J. Naghash, O. Okay, and Y. Yagci, Polymer Bull. 37, 207-213 (1996)

31. “Kinetics of emulsifier-free emulsion polymerization of methyl methacrylate”

T. Tanrisever, O. Okay, and I.C. Sonmezoglu, J. Appl. Polym. Sci. 61, 485-493 (1996)

30. “In situ fluorescence experiments to test the reliability of random bond and site bond percolation models during sol-gel transition in free-radical crosslinking copolymerization”

O. Pekcan, Y. Yilmaz, and O. Okay, Polymer 37, 2049-2053 (1996)

29. “Formation and structure of polyacrylamide gels”

H.J. Naghash, and O. Okay, J. Appl. Polym. Sci. 60, 971-979 (1996)

28. “Effect of diluents on the porous structure of crosslinked polymethyl methacrylate beads”

Kucuk, A. Kuyulu, and O. Okay, Polymer Bull. 35, 511-516 (1995)

27. “Critical properties for gelation in free-radical crosslinking copolymerization”

O. Okay, H.J. Naghash, and O. Pekcan, Macromol. Theory & Simul. 4, 967-981 (1995)

26. “Free radical crosslinking copolymerization. Effect of cyclization on diffusion-controlled termination at low conversion”

O. Okay, H.J. Naghash, and I. Capek, Polymer 36, 2413-2419 (1995)

25. “Cyclization and Reduced Pendant Vinyl Group Reactivity during the Free-radical Crosslinking Polymerization of 1,4-Divinylbenzene”

O. Okay, M. Kurz, K. Lutz, and W. Funke, Macromolecules 28, 2728 - 2737 (1995)

pd

f

24. “Gel Formation in Free-radical Crosslinking Copolymerization”

H.J. Naghash, O. Okay, and H. Yildirim, J. Appl. Polym. Sci. 56, 477 - 483 (1995)

23. “Pendant Vinyl Group Reactivity during the Free-radical Copolymerization of Methyl Methacrylate and Ethylene Glycol Dimethacrylate”

O. Okay, and H.J. Naghash, Polymer Bull. 33, 665 - 672 (1994)

22. “Fluorescence Technique to Study Sol-Gel Transition in the Free-radical Crosslinking Copolymerization of Methyl Methacrylate and Ethylene Glycol Dimethacrylate”

O. Pekcan, Y. Yilmaz, and O. Okay, Chem. Phys. Lett. 229, 537-540 (1994)

21. “Kinetics of Gelation in Free-radical Crosslinking Copolymerization”

O. Okay, Polymer 35, 2613 - 2618 (1994)

20. “Gel Properties in Free-radical Crosslinking Copolymerization: A Kinetic Approach”

O. Okay, Makromol. Chem. Theory and Simul. 3, 417 - 427 (1994)

19. “Kinetic Modelling of Network Formation and Properties in Free-radical Copolymerization”

O. Okay, Polymer 35, 796 - 807 (1994)

18. “Intramolecularly Crosslinked Macromolecules - Formation and Structure, Characterization and Particle Properties”

W. Funke, H. Bauer, B. Joos, J. Kaczun, B. Kleiner, U. Leibelt, and O. Okay, Polymer International 30, 519 - 523 (1993)

17. “Synthesis and Formation Mechanism of Porous 2-Hydroxyethyl Methacrylate - Ethylene Glycol Dimethacrylate Copolymer Beads”

O. Okay, and C. Gurun, J. Appl. Polym. Sci. 46, 401-410 (1992)

16. “Formation and Structural Characteristics of Porous Ethylene Glycol Dimethacrylate Networks”

O. Okay, and C. Gurun, J. Appl. Polym. Sci. 46, 421-434 (1992)

15. “Steric Stabilization of Reactive Microgels from 1,4-Divinylbenzene”

O. Okay, and W. Funke, Makromol. Chem. Rapid Commun. 11, 583-587 (1990)

14. “Conditions of Microgel Formation in the Anionic Polymerization of 1,4-Divinylbenzene”

O. Okay, and W. Funke, Makromol. Chem. 191, 1565-1573 (1990)

13. “Anionic Dispersion Polymerization of 1,4-Divinylbenzene”

O. Okay, and W. Funke, Macromolecules 23, 2623-2628 (1990)

12. “Formation and Structural Characteristics of Loosely Crosslinked Styrene-Divinylbenzene Networks”

O. Okay, Makromol. Chem. 189, 2201-2217 (1988)

11. “Styrene-Divinylbenzene Copolymers VII. Stability of the Porous Structures Formed in Toluene-Cyclohexanol Mixtures”

O. Okay, Angew. Makromol. Chem. 157, 15-21 (1988)

10. “Styrene-Divinylbenzene Copolymers VI. Porosity Formation in the Presence of Toluene-Cyclohexanol Mixtures as Inert Diluents”

O. Okay, Angew. Makromol. Chem. 157, 1-13 (1988)

9. “Styrene-Divinylbenzene Copolymers V. Inhomogeneity in the Structure and Average Degree of Swelling”

O. Okay, Angew. Makromol. Chem. 153, 125-134 (1987)

8. “Porous Maleic Anhydride-Styrene-Divinylbenzene Copolymer Beads”

O. Okay, J. Appl. Polym. Sci. 34, 307-317 (1987)

7. “Styrene-Divinylbenzene Copolymers IV. Porosity Changes During Chloromethylation”

O. Okay, Angew. Makromol. Chem. 143, 209-214 (1986)

6. “Heterogeneous Styrene-Divinylbenzene Copolymers. Stability Conditions of the Porous Structures”

O. Okay, J. Appl. Polym. Sci. 32, 5533-5542 (1986)

5. “Heterogeneous Styrene-Divinylbenzene Copolymers in Collapsed and Reexpanded States”

O. Okay, and T.I. Balkas, J. Appl. Polym. Sci. 31, 1785-1795 (1986)

4. “Phase Separation in the Synthesis of Styrene-Divinylbenzene Copolymers with Di-2-ethylhexyl Phthalate as Diluent”

O. Okay, E. Soner, A. Gungor, and T.I. Balkas, J. Appl. Polym. Sci. 30, 2065-2074 (1985)

3. “Boron Pollution in the Simav River, Turkey and Various Methods of Boron Removal”

O. Okay, H. Guclu, E. Soner, and T.I. Balkas, Water Research 19, 857 - 862 (1985)

2. “Stark basische Ionenaustauscher auf Guanidiniumsalz-Formaldehyd-Aceton-Basis”

O. Okay, and H. Schindlbauer, Angew. Makromol. Chem. 127, 203-209 (1984)

1. “Wasserlösliche Kationisch Modifizierte Copolymere mit Acrylamid”

O. Okay, and H. Schindlbauer, Angew. Makromol. Chem. 122, 21-31 (1984)

BOOKS

2. “Self-Healing and Self-Recovering Hydrogels”

C. Creton, O. Okay (eds.) Advances in Polymer Science 285, Springer, 2020.

1. “Polymeric Cryogels: Macroporous Gels with Remarkable Properties”

O. Okay (ed.) Advances in Polymer Science 263, Springer, 2014.

BOOK CHAPTERS

3. “General properties of hydrogels”

O. Okay, in G. Gerlach and K.-F. Arndt, eds., Hydrogel sensors and actuators, Springer Series on Chemical Sensors and Biosensors, Vol. 6, pp. , Springer, 2009.

2. “Production of macroporous polymeric materials by phase separation polymerization”

O. Okay, in B. Mattiasson, A. Kumar, and I. Y. Galaev, eds., Macroporous polymers: Production, properties and biotechnological/biomedical application, CRC Press, Taylor and Francis Group, Boca Raton, FL, 2009.

1. “Macroporous hydrogels from smart polymers”,

O. Okay, in B. Mattiasson and I. Galaev, eds., Smart Polymers: Production, Study and Application in Biotechnology and Biomedicine, 2nd edition, pp. 269-299, CRC Press, Taylor and Francis, Boca Raton, FL, 2007.

PATENTS

5. "Production of self-healable and shape memory butyl rubber” (Kendi kendini onarabilen ve şekil hafızalı butil kauçuk üretimi)

O. Okay, C. Bilici,

T. C. Patent Basvurusu, 18/06/2019 (2019)

4. "Production of macroporous reusable rubber sorbent for removal organic pollutants from water” (Organik kirleticilerin sulardan uzaklaştırılması için makrogözenekli, tekrar kullanılabilir kauçuk sorbent üretimi)

O. Okay, I. Karakutuk, D. Ceylan, O.S. Okay,

T. C. Patent, TR200909456 (2009)

3. “Preparation of novel macroporous sorbents and use of them for the removal of oil spills from surface waters” (Petrol döküntülerinin yüzey sularından uzaklaştırılması için yeni bir makrogözenekli sorbent üretimi ve uygulaması)

O. Okay, and D. Ceylan,

T. C. Patent, TR20070001790 20070321 (2007)

2. “Biyolojik çözeltilerin konsantre edilmesi için sicakliga duyarli polimerik jel kürecikleri üretimi”

N. Kayaman, O. Okay, D. Kazan, A. Erarslan, and B.M. Baysal,

T. C. Patent No: TR9600295 B, (1996)

1. “Superabsorbent materials based on butyl rubber: Process for making said materials and use of them”

B. Erman, O. Okay, and S. Durmaz,

International Patent, Patent Number WO0148042 A1, AU2470800, Publication Date: 2001-07-05

OTHER PUBLICATIONS

12. A.M. C. Şengör, N. Görür, O. Okay, Türkiye Jeolojisinin Büyük Kaybı: Prof. Dr. Aral Okay (1953-2023)

pdf1

pdf2

11. Okay, O., Kimya Bölümlerinin bilimsel başarısı,

makale

Cumhuriyet Bilim Teknik, Sayı 1050 (4.05.2007).

10. Okay, O., Olgun, H., Karakoc, F., Ayar, R., Okay, D., 21-23/04/2001 Hasandağı Tırmanışı

MAM Gündem, Sayı 35, Mayıs-Haziran 2001, Sayfa 9-11 (

GEZİ

)

9. Kaya, D., Okay, O., Pekcan, Ö., Real Time Monitoring of the Gel Effect in Free-Radical Crosslinking Copolymerization of Styrene and Divinylbenzene Using Fluorescence Probe

Turkish Journal of Physics 23, 179 (1999)

8. Pekcan, Ö., Yilmaz, Y., Okay, O., Fluorescence technique for studying the sol-gel transition in free-radical crosslinking copolymerization of methyl methacrylate and ethylene glycol dimethacrylate, abstract,

Turkish Journal of Physics 20, 70 (1996)

7. Okay, O., Teknoloji mi? Temel Arastirma mi?,

makale