Mesomorphic and Orientational Study of Materials Processed by In Situ Photopolymerization of Reactive Liquid Crystals
Mesomorphic and Orientational Study of Materials Processed by In Situ Photopolymerization of Reactive Liquid Crystals
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DOI：
10.1021/cm991036x
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发表时间：
1999-10
影响因子：
8.6
通讯作者：
C. Sánchez;B. Villacampa;R. Alcalá;C. Martínez;L. Oriol;M. Piñol;J. Serrano
中科院分区：
文献类型：
--
作者：
C. Sánchez;B. Villacampa;R. Alcalá;C. Martínez;L. Oriol;M. Piñol;J. Serrano
本文介绍了反应型液晶的合成和原位光聚合，用于制备具有不同交联度的材料。聚合物膜的分子取向可以通过定向介晶状态的单体光聚合材料来控制。描述了光聚合材料和所得聚合物的双折射，并评价了其对温度的依赖性。用反应性硝基二苯乙烯单元作为二向色性测量的探针，研究了聚合物薄膜的有序度。低交联度的聚合物膜显示出记忆效应，通过光学显微镜，X-射线衍射和双折射测量观察到。
The synthesis and in situ photopolymerization of reactive liquid crystals for the preparation of materials with different degrees of cross-linking is described. The molecular orientation of polymeric films can be controlled by orienting the monomeric photopolymerizable materials in the mesomorphic state. The birefringence of photopolymerizable materials and the resulting polymers are described, and its dependence on the temperature has been evaluated. The degree of order of polymeric films has been studied by using a reactive nitrostilbene unit as a probe for performing dichroism measurements. Polymeric films with a low degree of cross-linking showed a memory effect, as observed by optical microscopy, X-ray diffraction, and birefringence measurements.