Chinese invention patent: Side chained linear azobenzene liquid crystal polymer material and preparation method thereof

Inventor: Yanlei Yu, Jiu-an Lv, Jia Wei, Yuyun Liu

Applicant: Fudan University

Patent No.: ZL 201310034102.0

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.