The regulation of polymer structures and electro-optical properties of epoxy-mercaptan-based phase separated liquid crystals / polymer composites
The regulation of polymer structures and electro-optical properties of epoxy-mercaptan-based phase separated liquid crystals / polymer composites
复制标题
环氧硫醇基相分离液晶/聚合物复合材料的聚合物结构和电光性能调控
DOI：
10.1016/j.polymer.2017.07.003
复制
发表时间：
2017-10-03
期刊：
影响因子：
4.6
通讯作者：
Yang, Huai
中科院分区：
文献类型：
--
作者：
Chen, Mei;Hu, Wei;Yang, Huai
聚合物网络的形态对聚合物分散液晶(PDLC)材料的电光性能起着至关重要的作用。本文在一种尚未探索的基于环氧/低摩尔质量硫醇的热固化体系中，研究了聚合物形态与PDLCs电氧化性能之间的关系。通过改变液晶(LCS)含量、环氧单体的化学结构和硫醇固化剂的官能度，可以调节该固化体系中从聚合物珠到多孔聚合物基质的聚合物形态。有趣的是，当聚合物结构从聚合物微珠转变为多孔骨架时，即使LCS含量异常低，E-O性能也会有很大的改善。最后，阐述了不同聚合物结构的形成机理，建立了聚合物结构与电光性能之间的关系。这项工作为热固化PDLCs薄膜的形貌控制和电光性能的优化提供了新的见解。(C)爱思唯尔有限公司发布的2017年。
Morphologies of polymer networks are playing a key role in affecting the electro-optical (E-O) properties of a polymer dispersed liquid crystals (PDLCs) material. In this paper, the relationships between the polymer morphologies and the E-O properties of PDLCs are investigated in an unexplored thermally curing system based on epoxy/low-molar-mass-mercaptan. The polymer morphologies in this curing system can be regulated from polymer beads to porous polymer matrix by varying the liquid crystals (LCs) contents, chemical structures of epoxy monomers, and functionality of thiol hardeners. Interestingly, great improvements of E-O properties occur as the polymer structures change from polymer beads to porous frameworks, even though with an abnormal low LCs contents. Eventually, the mechanism for the formation of different polymer structures are illustrated and the relationships between the E-O properties and polymer structures are established. This work provides new insights in morphology control and optimizing the E-O properties in thermally cured PDLCs films. (C) 2017 Published by Elsevier Ltd.