反应诱导相分离制备新型温度敏感光学材料

反应诱导相分离制备新型温度敏感光学材料李兴林陈文杰江明（复旦大学高分子科学系和国家教委聚合物分子工程实验室上海２００４３３）关键词高分子合金，旋节线相分离，光散射，温度敏感光学性能温度敏感光学材料是一种具有广泛用途的功能材料，可用作记录材料、显...

NOVEL POLYMER ALLOYS WITH TEMPERATURE-DEPENDENT OPTICAL PROPERTIES PREPARED BY POLYMERIZATION-INDUCED SPINODAL DECOMPOSITION

A novel poly(methyl methacrylate co- vinyl acetate) / poly(ethylene -co- vinyl acetate) (poly(MMA co- VAc)/EVA) alloy with temperature dependent optical properties was prepared by radical copolymerization induced spinodal decomposition(SD) in the mixture of MMA/VAc/EVA. The structural development during copolymerization was investigated by time resolved light scattering(TRLS) and scanning electron microscopy (SEM). As the copolymerization of MMA and VAc proceeded, phase separation took place via SD. This was supported by the characteristic change in light scattering profiles with reaction time. SEM photographs show that the phase separated structure is isolated poly(MMA co VAc) rich domains dispersed in EVA rich matrix. The optothermal properties of poly(MMA co VAc)/EVA alloy were observed by transmittivity measurement, which shows that the transmittivity of the materials decreases continously with the increase of temperature and vice varsa. Hence, poly(MMA co VAc)/EVA alloy is of potential use in applications such as temperature controlled optical devices.