低玻璃化温度大分子RAFT-PBA对PDLC形貌的影响

张春梅; 阎 斌; 秦爱林; 汪映寒

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低玻璃化温度大分子RAFT-PBA对PDLC形貌的影响

器件制备技术及器件物理 | 更新时间：2020-08-12

- 低玻璃化温度大分子RAFT-PBA对PDLC形貌的影响
- Effect of Low T_g Macro-RAFT-PBA on Morphology of Polymer Dispersed Liquid Crystals
- 液晶与显示 2009年24卷第1期页码：76-80
- 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 610065
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： O753+.2;TN104.3
- 收稿日期：2008-05-26，
  
  修回日期：1900-01-02，
  
  网络出版日期：2009-02-20，
  
  纸质出版日期：2009-02-20
- 稿件说明：
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张春梅;阎斌;秦爱林;汪映寒. 低玻璃化温度大分子RAFT-PBA对PDLC形貌的影响[J]. 液晶与显示, 2009,24(1): 76-80

ZHANG Chun-mei;YAN Bin;QIN Ai-lin;WANG Ying-han. Effect of Low Tg Macro-RAFT-PBA on Morphology of Polymer Dispersed Liquid Crystals[J]. 液晶与显示, 2009,24(1): 76-80
张春梅;阎斌;秦爱林;汪映寒. 低玻璃化温度大分子RAFT-PBA对PDLC形貌的影响[J]. 液晶与显示, 2009,24(1): 76-80 DOI：

ZHANG Chun-mei;YAN Bin;QIN Ai-lin;WANG Ying-han. Effect of Low Tg Macro-RAFT-PBA on Morphology of Polymer Dispersed Liquid Crystals[J]. 液晶与显示, 2009,24(1): 76-80 DOI：

摘要

聚合物分散液晶(PDLC)的形貌对其电光性能有着极其重要的影响

通过控制固化条件实现对PDLC形貌的调控有着重要的实用价值。采用可逆加成-断裂链转移自由基(RAFT)聚合法制备了PDLC

研究了低玻璃化转变温度的大分子RAFT试剂聚丙烯酸丁酯(RAFT-PBA)含量和固化时间对PDLC形貌及关态透光率的影响。结果表明

随着固化时间的延长

PDLC关态透光率降低

最后趋于不变。液晶微滴尺寸随RAFT-PBA含量增加而逐渐增大

当其含量为15%时

PDLC的关态透光率最低。

Abstract

The morphology of polymer dispersed liquid crystals (PDLC) has a great influence on their electro-optical properties

so there is an important academic value to adjust the morphology of PDLC through the different curing conditions. In this paper

reversible addition fragmentation transfer (RAFT) polymerization was employed to prepare PDLC in the process of polymerization induced phase separation (PIPS). The effects of RAFT-PBA concentration and curing time on morphology and OFF-state transmittance of PDLC were studied. It was found that the OFF-state transmittance of PDLC decreases with increasing the curing time

and then keeps constant. The more RAFT-PBA there are in the PDLC films

the bigger the radius of the liquid crystal droplets become. The lowest OFF-state transmittance was achieved when the concentration of RAFT-PBA in the systems was 15%.

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references

. Higgins D A. Probing the mesoscopic chemical and physical properties of polymer-dispersed liquid crystals [J]. Advanced Materials, 2000, 12(4): 251-264.

. 曹须, 刘文菊, 王杰, 等. PDLC 制备过程中聚合物和液晶的选择 [J]. 液晶与显示 , 2006, 21(5): 414-417.

. Mucha M. Polymer as an important component of blends and composites with liquid crystals [J]. Progress in Polymer Science, 2003, 28(5):837-873.

. Doane J W, Vaz N A, Wu B G, et al. Field controlled light scattering from nematic microdroplets [J]. Appl. Phys. Lett., 1986, 48(2): 269-271.

. 王丽萍, 杨海莲, 王立波, 等. 羟基和交联剂对PDLC 膜电-光性能的影响 [J]. 液晶与显示 , 2006, 21(5): 439-443.

. Vaz N A, Smith G W, Montgomery G P. A light control film composed of liquid crystal droplets dispersed in a UV-curable polymer [J]. Molecular Crystals and Liquid Crystals, 1987, 146(1):1-15.

. 王平华, 张斌, 唐龙祥, 等. 可逆加成-断裂链转移活性自由基聚合 [J]. 高分子材料与工程, 2006, 22(5): 110:116.

. Vaia R A, Tomlin D W, Schulte M D, et al. Two-phase nanoscale morphology of polymer/LC composites [J]. Polymer, 2001,42(3): 1055-1065.

. 阎斌, 王守廉, 何杰, 等. 聚合物结构对PDLC性能的影响 [J]. 液晶与显示 , 2007, 22(2):44-47.

. 潘懿, 张红东, 杨玉良, 等. 紫外光固化PDLC膜的形态及电光性能 [J]. 高等学校化学学报, 1994, 15(6): 920-924.

. 王晓安, 何杰, 阎斌, 等. 聚合物网络液晶电光性能的研究 [J]. 液晶与显示 , 2007, 22(4): 372-377.

. He J, Yan B, Yu B, et al. The effect of molecular weight of polymer matrix on properties of polymer dispersed liquid crystals [J]. European Polymer Journal, 2007, 43(6): 2745-2749.

. Yan B, He J, Bao R, et al. Modification of electro-optical properties of polymer dispersed liquid crystals by iniferter polymerization [J]. European Polymer Journal, 2008, 44(3): 952-958.

. Bouteiller L. Polymer-dispersed liquid crystals: Preparation, operation and application [J]. Liquid Crystals, 1996, 21(2):157-174.

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