引入4种玻璃化温度不同的单体,通过可逆加成-断裂链转移和引发转移终止剂活性自由基聚合相结合的方法制备出不同主链柔性的活性接枝大分子引发剂MI,并用其制备了聚合物分散液晶膜,研究了MI的主链柔性对接枝聚合物为基体的PDLC电光性能的影响.研究发现,随着MI主链柔性增加,PDLC的关闭状态透光率、液晶微漓的粒径都是先减小后增大,并都在大分子引发剂为RAFT-P (BMA-co-CMSI)时有最小值;阈值电压、饱和电压均呈现了先增大后减小的变化趋势;但是滞后的变化却表现出多元化,这是由于滞后受到多种因素综合影响导致的.
参考文献
[1] | Justice R S,Schaefer D W,Vaia R A,et al.Interface morphology and phase separation in polymer-dispersed liquid crystal composites[J].Polymer,2005,46(12):4465-4473. |
[2] | Wang P C,Macdiarmid A G.Integration of polymer-dispersed liquid crystal composites with conducting polymer thin films toward[J].Displays,2007,28(3):101-104. |
[3] | 秦爱林,汪映寒.多官能Iniferter制备聚合物分散液晶膜及其含量对电光性能的影响[J].高分子学报,2010,(7):870-875. |
[4] | 张玉良,秦爱林,汪映寒.大分子引发剂的分子量对接枝聚合物基体的PDLC电光性能的影响[J].高分子学报,2012,(5):534-538. |
[5] | Lai J T,Filla D,Shea R.Functional polymers from novel carboxyl-terminated trithiocarbo-nates as highly efficient RAFT agents[J].Macromolecules,2002,35(18):6754-6756. |
[6] | Otsu T,Yamashita K,Tsuda K.Synthesis,reactivity,and role of 4-vinylbenzyl N,N-diethyldithiocarbamate as a monomer-iniferter in radical polymerization[J].Macromolecules,1986,19(2):287-290. |
[7] | 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):129-133. |
[8] | Yan B,He J,Wang Y H,et al.Modification of electro-optical properties of polymer dispersed liquid crystal films by iniferter polymerization[J].European Polymer Journal,2008,44(3):952-958. |
[9] | Xin D,Bin Y,Wang Y H.Influence of matrix glass transition temperature on the memory effect of polymer-dispersed liquid crystals[J].J.Polym.Sci.Part B:Polym.Phys.,2010,48(6):729-732. |
[10] | Xin D,Bin Y,Wang Y H,et al.The improvement of electro-optical properties of polymer-dispersed liquid crystals using copolymer macroinitiator with different glass transition temperature[J].J.Polym.Sci.Part A:Polym Chem.,2010,48(23):5557-5561. |
[11] | Bin Y,Jie H,Wang Y H,et al.Modification of electro-optical properties of polymer dispersed liquid crystal films by iniferter polymerization[J].European Polymer Journal,2008,44(3):952-958. |
[12] | Lackser A M,Margerum J D,Ramos E,et al.Droplet size control in polymer dispersed liquid crystal films[J].SPIE Liquid Crystal Chemical,Physics,and Application,1989,(1080):53-61. |
[13] | Kim B K,Kim S H,Song J C.Polymer network liquid crystals from u.v.curable polyurethane acrylate[J].Polymer,1998,39(24):5949-5959. |
[14] | Sugimura A,Ishino D.Nematic director deformation induced by a periodic surface anchoring strength[J].Thin Solid Films,2003,438-439(22):433-439. |
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%