聚合单体对聚合物分散液晶薄膜视角电光特性的影响  

Influence of polymeric monomers on the electro-optic properties of polymer dispersed liquid crystal films

作　　者：赵霄向 刘露露 王一平 李正强 李敬磊 ZHAO Xiaoxiang;LIU Lulu;WANG Yiping;LI Zhengqiang;LI Jinglei(Shijiazhuang Chengzhi Yonghua Display Material Co.Ltd.,Shijiazhuang 050000,China)

机构地区：[1]石家庄诚志永华显示材料有限公司,河北石家庄050000

出　　处：《液晶与显示》2025年第3期424-430,共7页Chinese Journal of Liquid Crystals and Displays

摘　　要：聚合物分散液晶(PDLC)薄膜的视角电光性能对其在实际应用中的观感效果具有显著影响。为优化PDLC薄膜的视角性能,缩小其侧视角与正视角雾度差值,改善人们的实际观感,本文从聚合单体的角度出发,对PDLC薄膜的视角电光特性展开研究,深入探究影响PDLC薄膜视角性能的因素。采用聚合诱导相分离(Polymerization Induced Phase Separation,PIPS)技术制备PDLC薄膜,借助雾度计测量由双官能团聚合单体、甲基类功能型聚合单体、羟基类功能型聚合单体制成的PDLC薄膜的视角雾度值,并计算PDLC薄膜正视角雾度与侧视角雾度的差值。实验结果显示,烷基链长度适宜、与液晶折射率(no)相匹配且位阻较小的聚合单体EOHDDA、IBOMA、4-HBA所制备的PDLC薄膜,其侧视角与正视角雾度差值(ΔH)最小,为2.66%;由此制得的宽视角型PDLC薄膜电光性能最佳、视角差值最小、视觉效果最优,能够满足实际应用需求。The electro-optical performance of the viewing angle of polymer dispersed liquid crystal(PDLC)films can exert an influence on people’s perception effect in practical applications.To optimize the viewing angle performance of PDLC films and reduce the difference in haze between the side view and the front view,thereby improving people’s actual perception,this paper conducts a study on the electro-optical characteristics of PDLC films from the perspective of polymer monomers and explores the factors affecting the viewing angle performance of PDLC.PDLC is fabricated using the polymerization-induced phase separation(PIPS)technique.The viewing angle haze values of PDLC films fabricated with bifunctional monomers,methyl-functional monomers and hydroxyl-functional monomers are tested using a haze meter,and the difference in haze between the frontal viewing angle and the lateral viewing angle of PDLC is calculated.The experimental results indicate that the PDLC fabricated with polymer monomers such as EOHDDA,IBOMA and 4-HBA,which feature a moderate alkyl chain length,a refractive index(n_(o))matching that of the liquid crystal,and low steric hindrance,has the smallest viewing angle haze difference(ΔH),which is 2.66%.The electro-optical performance of this wide-viewing-angle PDLC film is the best,with the smallest viewing angle difference and the optimal visual effect,which can meet the needs of practical applications.

关 键 词：聚合物分散液晶 聚合单体 视角性能 折射率 

分 类 号：O753.2[理学—晶体学]