Preparation of a new polymer-dispersed liquid crystal film by using phthalocyanine-functional photocurable copolymer
Corresponding Author
Humeyra Mert
Department of Chemical Engineering, Hitit University, Faculty of Engineering, 19030 Çorum, Turkey
Correspondence to: H. Mert (E-mail: [email protected]) and H. Dinçer (E-mail: [email protected])Search for more papers by this authorCorresponding Author
Hatice Dinçer
Department of Chemistry, İstanbul Technical University, Faculty of Science and Letters, 34469 Maslak, İstanbul, Turkey
Correspondence to: H. Mert (E-mail: [email protected]) and H. Dinçer (E-mail: [email protected])Search for more papers by this authorEmel Çalışkan
Department of Chemical Engineering, Hitit University, Faculty of Engineering, 19030 Çorum, Turkey
Search for more papers by this authorBetül Nur Şen
Department of Chemistry, İstanbul Technical University, Faculty of Science and Letters, 34469 Maslak, İstanbul, Turkey
Search for more papers by this authorYeşim Hepuzer Gürsel
Department of Chemistry, İstanbul Technical University, Faculty of Science and Letters, 34469 Maslak, İstanbul, Turkey
Search for more papers by this authorCorresponding Author
Humeyra Mert
Department of Chemical Engineering, Hitit University, Faculty of Engineering, 19030 Çorum, Turkey
Correspondence to: H. Mert (E-mail: [email protected]) and H. Dinçer (E-mail: [email protected])Search for more papers by this authorCorresponding Author
Hatice Dinçer
Department of Chemistry, İstanbul Technical University, Faculty of Science and Letters, 34469 Maslak, İstanbul, Turkey
Correspondence to: H. Mert (E-mail: [email protected]) and H. Dinçer (E-mail: [email protected])Search for more papers by this authorEmel Çalışkan
Department of Chemical Engineering, Hitit University, Faculty of Engineering, 19030 Çorum, Turkey
Search for more papers by this authorBetül Nur Şen
Department of Chemistry, İstanbul Technical University, Faculty of Science and Letters, 34469 Maslak, İstanbul, Turkey
Search for more papers by this authorYeşim Hepuzer Gürsel
Department of Chemistry, İstanbul Technical University, Faculty of Science and Letters, 34469 Maslak, İstanbul, Turkey
Search for more papers by this authorABSTRACT
A new, asymmetrical zinc phthalocyanine (aZnPc)-functional photocurable copolymer was prepared by the combination of atom transfer radical polymerization and copper (I)-catalyzed azide-alkyne cyclo-addition (CuAAC) click reaction and used as polymer matrix of polymer dispersed liquid crystal (PDLC) film. For this purpose, aZnPc was prepared through statistical condensation of 4-tert-butylphthalonitrile and 4-pent-4-ynyloxyphthalonitrile. Double CuAAC click reaction between azido-functional poly(methyl methacrylate-co-2-(2-bromoisobutyryloxy)-ethyl methacrylate), terminal alkynyl-substituted aZnPc, and 4-ethynyl-N,N-dimethyl aniline yielded photocurable aZnPc-functional copolymer. Thereby, synthesized copolymer was crosslinked in the presence of liquid crystalline mesogen 4′-(octyloxy)-4-biphenylcarbonitrile by ultraviolet irradiation using benzophenone as initiator and ethylene glycol dimethacrylate as difunctional crosslinker. Thermal and optical properties of PDLC film were investigated by using differential scanning calorimetry and polarized optical microscopy. Smectic A liquid crystal mesophases were observed in both PDLC film and its mesogenic component 4′-(octyloxy)-4-biphenylcarbonitrile. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41574.
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