中国发明专利：一种侧链式线性偶氮苯液晶高分子材料及其制备方法

发明（设计）人：俞燕蕾，吕久安，韦嘉，刘玉云

申请人：复旦大学

专利号：ZL 201310034102.0

摘要：

本发明属液晶高分子材料技术领域，具体为一种侧链式线性偶氮苯液晶高分子材料及其制备方法。本发明在Grubbs催化剂催化下，使用5-取代的环辛烯（取代基为偶氮苯衍生物）单体，通过开环易位聚合法合成了以丁二烯-乙烯-功能基取代乙烯三元交替高分子为主链，偶氮苯衍生物为侧链结构的新型液晶高分子材料。本发明解决了以往偶氮苯液晶弹性体材料不溶不熔，无法采用常见加工成型方法制备的难题。本发明材料在没有交联网络结构的情况下，具有橡胶弹性，良好的光响应特性；材料熔融或溶解后即可加工成薄膜、纤维等液晶高分子材料，加工尺寸、外形无限制，加工成型后可回收循环再次加工成型，是一种新型低碳环保的光响应液晶高分子材料。

Abstract：

The invention belongs to the technical field of liquid crystal polymer materials, and particularly relates to a side chained linear azobenzene liquid crystal polymer material and a preparation method thereof. In the method, a novel liquid crystal polymer material using butadiene-ethylene-functional group substituted ethylene ternary alternative polymer as a main chain and the azobenzene derivative as a side chain structure is synthesized by using an open loop translocation polymerization method through using a 5-substituted cyclooctene (a substituent group is an azobenzene derivative) monomer in the presence of a Grubbs catalyst. According to the invention, the problem that the conventional azobenzene liquid crystal elastomer material is insoluble and is not molted so as not to be prepared by adopting a common machine shaping method. Under the condition of no cross-linked network structure, the side chained linear azobenzene liquid crystal polymer material has the rubber elasticity and good optical response characteristic; and the side chained linear azobenzene liquid crystal polymer material can machined to form liquid crystal polymer materials, such as films and fibers, after molten or dissolved without being limited in machining size and appearance and can be recycled for re-machine shaping after machine-shaping, and is a novel low-carbon and environment-friendly optical response liquid crystal polymer material.