【作者】 周建魁； 何瑞； 李香丹； 李立忠；

【Author】 ZHOU Jiankui;HE Rui;LI Xiangdan;LI Lizhong;South-Central University For Nationalities;

【机构】 中南民族大学化学与材料科学学院；

【摘要】 <正>光学高分子由于在注射成型或挤出成型的加工过程中高分子链取向,会使高分子产生双折射现象。双折射的产生对光学材料的应用于高性能光学器件具有极大的影响,零双折射可以减小甚至消除延迟（Retardation）,在一定程度上其可以缓解色偏效应,提高光源利用率。PMMA具有透光性好,容易成型,抗紫外线等优点,但是其也有玻璃化温度低（一般80-100℃）,易碎,具有负的双折射率等缺点^[1-3]。本文采用自由基聚合方法设计合成侧链上含有查尔酮结构的一系列聚甲基丙烯酸甲酯更多还原

【Abstract】 A series of photosensitive methacrylate copolymers with chalcone group on the side chains were synthesized by radical polymerization,methyl methacrylate(MMA) and4-methacryloyloxystyryl phenyl ketone(MSPK) were used as monomers.The chemical structures of the copolymers were confirmed by IH-NMR and FT-IR.The copolymers exhibit good photosensitivity,and with the maximum absorption peak of UV-Vis at 315 nm.The birefringence of the copolymer was readily controlled by adjusting the content of MSPK and the UV irradiation time.It was found that the birefringence turned to be zero while the content of MSPK in copolymer was12.3%,and the birefringence of the copolymer with 20%content of MSPK after irritated under UV for 5 second also turned to be zero.These results suggest that a series of zero birefringent materials may have useful properties with applications in optical devices.更多还原