液晶与显示2017，Vol.32Issue(12)：968-972,5.DOI:10.3788/YJYXS20173212.0968
反应温度对亲核试剂引发点击化学制备聚合物分散液晶电光性能的影响
Effects of reaction temperature on electro-optical properties of polymer-dispersed liquid crystal films fabricated by nucleophile-initiated thiol-ene click reaction
摘要
Abstract
Photo-polymerization-induced phase separation is a most widely used method to fabricate polymer dispersed liquid crystal (PDLC) films.Meanwhile,dichroic dye is usually introduced into PDLC films to enhance the contrast ratio.However,until now,commercial dye-doped PDLC films are still very few,because UV-light can make dye decompose in the process of photo-polymerization-induced phase separation and dye absorbs UV-light causing the polymerization rate of the prepolymer to slow down.Recently,nucleophile-initiated click reaction,which can be processed without UV-light,is a research hotspot in synthetic chemistry.Thus,fabricating PDLC films via click reaction initiated by nucleophile may hopefully overcome the shortcomings of traditional photo-polymerization-induced phase separation method.In our work,PDLC films were prepared via thiol-ene click reaction initiated by nucleophile.The influences of reaction temperature on electro-optical properties of PDLC were investigated.It was found that reaction temperature influenced the electro-optical properties of PDLC films by changing the droplets size of liquid crystal.With the increase of reaction temperature,ON state transmittance (Ton) decreases,while threshold voltage (Vth) and saturation voltage (Vsat) increases.关键词
聚合物分散液晶/点击化学/反应温度/电光性能Key words
polymer dispersed liquid crystal/click reaction/reaction temperature/electro-optical property分类
信息技术与安全科学引用本文复制引用
毛远洪,邵磊山,李静静,钟向宏,肖树萌,王莹,石志清,汪映寒..反应温度对亲核试剂引发点击化学制备聚合物分散液晶电光性能的影响[J].液晶与显示,2017,32(12):968-972,5.基金项目
国家自然科学基金(No.51173115)Supported by National Natural Science Foundation of China(No.51173115) （No.51173115）
