大分子引发剂的分子量对聚合物分散液晶的微观形貌影响

邵磊山; 李静静; 杜鑫; 汪映寒

doi:10.3788/YJYXS20122706.0736

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大分子引发剂的分子量对聚合物分散液晶的微观形貌影响

材料物理和化学 | 更新时间：2020-08-12

- 大分子引发剂的分子量对聚合物分散液晶的微观形貌影响
- Effect of Molecular Weight of Macroinitiator on Morphology of Polymer Dispersed Liquid Crystal
- 液晶与显示 2012年27卷第6期页码：736-741
- 作者机构：
  
  四川大学高分子科学与工程学院高分子材料工程国家重点实验室,四川成都,61006
- 作者简介：
- 基金信息：
  
  国家自然科学基金(No.50973067,No.51173115)();博士点基金(No.20110181110030)();四川大学学生创新实验项目()
- DOI：10.3788/YJYXS20122706.0736
  中图分类号： TN27
- 收稿日期：2012-09-13，
  
  修回日期：2012-10-19，
  
  纸质出版日期：2012-12-15
- 稿件说明：
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邵磊山, 李静静, 杜鑫, 汪映寒. 大分子引发剂的分子量对聚合物分散液晶的微观形貌影响[J]. 液晶与显示, 2012,(6): 736-741

SHAO Lei-shan, LI Jing-jing, DU Xin, WANG Ying-han. Effect of Molecular Weight of Macroinitiator on Morphology of Polymer Dispersed Liquid Crystal[J]. , 2012,(6): 736-741
邵磊山, 李静静, 杜鑫, 汪映寒. 大分子引发剂的分子量对聚合物分散液晶的微观形貌影响[J]. 液晶与显示, 2012,(6): 736-741 DOI： 10.3788/YJYXS20122706.0736.

SHAO Lei-shan, LI Jing-jing, DU Xin, WANG Ying-han. Effect of Molecular Weight of Macroinitiator on Morphology of Polymer Dispersed Liquid Crystal[J]. , 2012,(6): 736-741 DOI： 10.3788/YJYXS20122706.0736.

摘要

采用可逆加成-断裂链转移(RAFT)活性自由基聚合法制备了不同分子量的苯乙烯大分子引发剂(RAFT-PS)

并通过紫外光聚合诱导相分离法制备聚合物分散液晶(PDLC)膜。研究了不同分子量的RAFT-PS对PDLC的微观形貌、光聚合动力学、液晶向列取向程度以及电光性能等方面的影响。研究表明

影响PDLC的微观形貌的关键因素是RAFT-PS的分子量

而不是聚合物基体分子量。通过调整RAFT-PS的分子量

能够有效控制液晶微滴粒径

进而改善PDLC的电光性能。

Abstract

The polymer dispersed liquid crystal (PDLC) films were prepared by photopolymerization induced phase separation with macroinitiator (RAFT-PS) of different molecular weight

synthesized by RAFT polymerization. The influences of molecular weight of RAFT-PS on morphology

photopolymerization kinetics

nematic fraction and electro-optical pro-perties of PDLCs had been investigated. It was found that the key factor of affecting morphology was not the molecular weight of polymer matrix and the rate of polymerization but the molecular weight of RAFT-PS. On the other hand

the diameter of liquid crystal droplets was effectively controlled by changing the molecular weight of RAFT-PS. This result contributed to improve electro-optical properties of PDLCs.

关键词

Keywords

references

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