Kim, JM Lee, SY Chung, CM Ahn, KD Han, JS Choo, DJ 2024-01-21T17:01:47Z 2024-01-21T17:01:47Z 2021-09-03 1998-06-30 1225-5947 https://pubs.kist.re.kr/handle/201004/142991 Azobenzene polymers having succinimide backbone structures were prepared and photoinduced birefringence of the polymers was investigated. Three functional maleimide monomers, N-4-[4-(phenylazo)phenylcarbamoyl]phenylmaleimide (1), N-4-[4-(4-nitrophenylazo)phenylcarbamoyl]phenylmaleimide (2), 2-[N-ethyl-4-(4-nitrophenylazo)phenylamino]ethyl maleimidobenzoate (3) were synthesized by reacting maleimidobenzoyl chloride with three azobenzene dyes, p-phenylazoaniline, disperse orange 3, disperse red 1 (DR1), respectively. Radical copolymerizations of the monomers 1, 2, and 3 with styrene, isobutyl vinyl ether, or methyl methacrylate were carried out to obtain soluble azobenzene-containing polymaleimides. The styrenic copolymers P1, P2, and P3 have high glass transition temperatures of 200, 175 and 150 degrees C, respectively. A different azo polymer, P4 was obtained by copolymerization of N-phenylmaleimide (PMI) with 3-isopropenyi-alpha,alpha-dimethylbenzyl isocyanate (IMSt) followed by a postreaction of the isocyanate prepolymer P(PMI/IMSt) with DR1. Upon irradiation of the amorphous films with linearly polarized light P3 and P4 rendered birefringence by induced optical anisotropy. English POLYMER SOC KOREA REVERSIBLE OPTICAL STORAGE AZO POLYMERS SIDE-GROUPS COPOLYMERS ROUTE Synthesis and photoinduced birefringence of azobenzene-containing polymaleimides Article 1 KOREA POLYMER JOURNAL, v.6, no.2, pp.193 - 199 KOREA POLYMER JOURNAL 6 2 193 199 scie scopus 000074625300012 2-s2.0-3142613491 Polymer Science Polymer Science Article REVERSIBLE OPTICAL STORAGE AZO POLYMERS SIDE-GROUPS COPOLYMERS ROUTE azobenzene polymers photoinduced birefringence