固化条件对聚合物分散液晶膜电光性能的影响  

Effects of curing condition on electro-optical properties of polymer dispersed liquid crystal films

作　　者：张冬冬 张婷婷 曹晖 陈寅杰[2] 杨洲 王冬 何万里 ZHANG Dong-dong;ZHANG Ting-ting;CAO Hui;CHEN Yin-jie;YANG Zhou;WANG Dong;HE Wan-li(State Key Laboratory for Advanced Metals and Materials,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;Beijing Engineering Research Center of Printed Electronics,Beijing Institute of Graphic Communication,Beijing 102600,China)

机构地区：[1]北京科技大学材料科学与工程学院新金属材料国家重点实验室,北京100083 [2]北京印刷学院北京市印刷电子工程技术研究中心,北京102600

出　　处：《分子科学学报》2020年第1期23-29,I0002,共8页Journal of Molecular Science

基　　金：国家留学基金资助项目;国家自然科学基金资助项目(51773017,51673023,51702019);新金属材料国家重点实验室自主课题资助项目(2018Z-06);中央高校基本科研业务费专项资金资助项目(FRF-DF-19-001).

摘　　要：选用聚乙二醇二缩水甘油醚(EGDE)/季戊四醇缩水甘油醚(PERTGE)/1,8-二氨基-3,6-二氧杂辛烷(EDBEA)/向列相液晶(SLC1717)复合体系,在不同的固化条件下,通过热聚合诱导相分离方法制备了一系列电光性能不同的聚合物分散液晶(polymer dispersed liquid crystal,简称PDLC)膜.研究了固化温度和固化时间对制备的PDLC膜中聚合物网络的微观形貌和电光性能的影响.结果表明,随着固化温度的升高以及固化时间的缩短,PDLC膜的对比度、驱动电压和开态响应时间逐渐增大,而关态响应时间逐渐减小.在固化温度为363.2 K,固化时间为7 h时,所制备的PDLC膜具有较佳的电光性能.Polymer dispersed liquid crystal(PDLC)films were prepared from thermal polymerization induced phase separation in ethylene glycol diglycidyl ether(EGDE)/pentaerythritol tetraglycidyl ether(PERTGE)/1,8-diamino-3,6-dioxaoctane(EDBEA)/SLC1717 mixtures.The effects of curing condition on the micromorphology of polymer network and electro-optical properties of PDLC films were studied.The results show that driving voltage,contrast ratio and on-state response time increase and off-state response time decreases with the increase of curing temperature or the decrease of curing time.The PDLC film shows better electro-optical properties at the curing temperature of 363.2 K with the curing time of 7 h.

关 键 词：聚合物分散液晶 固化条件 聚合物网络 微观形貌 电光性能 

分 类 号：O647[理学—物理化学]