液晶/聚合物复合膜作为成膜材料,其紫外光固化时间对膜的电光性能及微观形貌有很大的影响.文中利用可逆加成-断裂转移自由基聚合(RAFT)制备了活性聚苯乙烯(PS)大分子引发剂,用以引发丙烯酸甲酯(MA)进行活性聚合制备聚合物分散液晶(PDLC)薄膜.系统研究了紫外光固化时间对RAFT-PS基PDLC薄膜电光性能及微观形貌的影响及影响机理.研究表明,通过RAFT法制备的PDLC在较短时间内即完成相分离,并且随着紫外光固化时间的延长,PDLC的阈值电压(Vth)和饱和电压(Vsat)升高,关态透光率(Toff)、记忆效应(△T)和最大透光率(Tmax)下降,薄膜的微观形貌也出现了连续明显的变化.随着紫外固化反应时间延长,聚合物基体的相对分子质量显著增加.
参考文献
| [1] | Skey J;O'Reilly RK .Facile one pot synthesis of a range of reversible addition-fragmentation chain transfer (RAFT) agents[J].Chemical communications,2008(35):4183-4185. |
| [2] | He J;Yan B;Yu BY;Wang SL;Zeng Y;Wang YH .The effect of molecular weight of polymer matrix on properties of polymer-dispersed liquid crystals[J].European Polymer Journal,2007(6):2745-2749. |
| [3] | Maschke U.;Coqueret X.;Benmouna M. .Electro-optical properties of polymer-dispersed liquid crystals[J].Macromolecular rapid communications: Publishing the newsletters of the European Polymer Federation,2002(3):159-170. |
| [4] | Sugimura A.;Ishino D. .Nematic director deformation induced by a periodic surface anchoring strength[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2003(0):433-439. |
| [5] | He J;Yan B;Wang XA;Yu BY;Wang YG .A novel polymer dispersed liquid crystal film prepared by reversible addition fragmentation chain transfer polymerization[J].European Polymer Journal,2007(9):4037-4042. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%