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液晶与显示 2010, 25(1) 53-56  ISSN:  CN

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器件制备技术及器件物理
聚合物基体分子量及极性 对聚合物分散液晶迟滞效应的影响
胡晓阳;杜 鑫;汪映寒
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
摘要

聚合物分散液晶(PDLC)是液晶微滴分散在聚合物基体中形成的一种新型显示材料。文章采用可逆加成断链转移(RAFT)聚合法制备大分子引发剂,引发可聚合单体甲基丙烯酸甲酯进行聚合,利用光引发聚合诱导相分离法制备了PDLC膜。通过改变大分子引发剂的含量和种类,研究了基体分子量及极性对PDLC迟滞效应的影响。实验结果显示,聚合物基体的参数对PDLC的迟滞效应有显著影响,迟滞效应随着基体分子量的下降而明显增大,而降低基体的极性可以明显减小PDLC的迟滞效应。

关键词 聚合物分散液晶   迟滞效应   聚合物分子量   极性  
Influence of Polymer Matrix Molecule Weight and Polarity on Hysteresis Effect of Polymer Dispersed Liquid Crystals
HU Xiao-yang;DU Xin;WANG Ying-han
State Key Laboratory of Polymer Materials Engineering of China, College of Polymer Science and Engineering, Sichuan University,Sichuan 610065, China
Abstract:

Polymer dispersed liquid crystal (PDLC) films are particular devices consisting of micrometer-sized liquid crystal droplets dispersed in a polymer matrix. In this paper, PDLC films were prepared by photo-polymerization induced phase separation which were initiated by macroinitiator prepared by reversible addition fragmentation chain transfer (RAFT) polymerization. The influence of matrix molecule weight and polarity on the hysteresis effect of PDLCs was investigated. The results showed that parameters of the polymer matrix can significantly affect the hysteresis of PDLCs. Hysteresis increased as the molecule weight of the matrix decreased, and the decrease of the polarity of polymer matrix can efficiently reduce the hysteresis effect of PDLCs.

Keywords: polymer dispersed liquid crystal   hysteresis effect   molecule weight of polymer   polarity  
收稿日期 2009-08-21 修回日期 1900-01-01 网络版发布日期 2010-02-20 
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参考文献:
[1]. 范星河,谢晓峰,Hatat Y.溶剂法制备聚合物分散液晶膜 [J]. 高分子材料科学与工程, 2002,18(3):169-171.
[2]. Drzaic Paul S.Liquid Crystal Dispersions [M].Singapore:World Scientific Publishing Company,1995.
[3]. Bouteiller L,Le Barny P.Polymer-dispersed liquid crystals: Preparation, operation and application [J].Liq. Cryst.,1996,21(2):157-174.
[4]. 任洪文,凌志华,黄锡珉.PDLC器件显示迟滞效应的改善 [J]. 液晶与显示 ,2000, 15(1):40-45.
[5]. Yamada N,Hirai T,Ohnishi N, et al.Electro-optical properties of PDLC cells containing fluorinated polymer //Tokyo,Japan:The Institute of Television Engineers of Japan,1992:695-698.
[6]. Yamada N,Ohnishi N,Kondo M, et al. Electro-optical properties of PDLC cells //SID93 Digest,California,USA:SID,1993:401-403.
[7]. Niiyama S,Hirai Y,Kumai H, et al.A hysteresis-less LCPC device for a projection display //SID'92 Digest, California, USA:SID,1992:575-578.
[8]. Drzalc P S. A new director alignment for droplets of nematic liquid crystal with low bend-to-splay ratio [J].Mol. Cryst. Liq. Cryst,1988,154:289.
[9]. Lai J T, Filla D, Shea R.Functional polymers from novel carboxyl-terminated trithiocarbonates as highly efficient RAFT agents [J]. Macromolecules,2002,35:6754-6756.
[10]. He J,Yan B,Wang YH.RAFT copolymerization as a means to enhance the electro-optical performance of polymer dispersed liquid crystal films [J]. J. Polym. Sci. Polym. Chem., 2007,45:4144-4149.
[11]. Daniela C, Marialuigia M, Fiore P N, et al. Surface anchoring, polarization fields and memory states in polymer dispersed liquid crystals [J]. Liq. Cryst., 2001,28(2):287-290.
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