The Electro-Optical Properties and Adhesion Strength of Epoxy-Polymercaptan-Based Polymer Dispersed Liquid Crystal Films

被引：15
作者：
Chen, Gang [1 ]
Hu, Wei [2 ]
Zhou, Le [2 ]
Zhang, Huimin [3 ]
Wang, Ling [4 ]
Zhang, Cuihong [3 ]
Sun, Jian [2 ]
Zhang, Lanying [2 ]
Yuan, Xiaotao [5 ]
Zhu, Siquan [1 ,6 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China
[3] Xijing Univ, Sch Sci, Key Lab Organ Polymer Photoelect Mat, Xian 710123, Peoples R China
[4] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[5] Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Dept Chem & Chem Engn, Beijing 100083, Peoples R China
[6] Capital Med Univ, Dept Ophthalmol, Beijing Anzhen Hosp, Beijing 100020, Peoples R China
来源：
CRYSTALS | 2021年 / 11卷 / 06期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
polymer dispersed liquid crystal; polymer network morphologies; electro-optical properties; adhesion strength; LIGHT-TRANSMITTANCE; DRIVEN; COMPOSITES; DISPLAY;
D O I：
10.3390/cryst11060576
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Polymer dispersed liquid crystal (PDLC) films were prepared by thermal polymerization-induced phase separation in epoxy/polymercaptan/liquid crystal (LC)/accelerator mixtures. The effects of the concentration of LC and accelerator, the curing temperature, and the structure of epoxy monomer on the electro-optical (E-O) properties and adhesion strength of the PDLC films were studied systematically via E-O, peel strength, DSC, IR, and gel measurements. It showed that different polymer structures and the properties of the polymer can be obtained by changing the compositions and the curing temperature, which had significant impacts on the E-O properties of the PDLC films. Meanwhile, the polymer matrix with high glass-transition temperature (T-g) and small pore size will improve the adhesion strength of the PDLC film, and these kinds of epoxy-polymercaptan-based PDLC films have better performance than traditional acrylate-based PDLC in the aspect of the adhesion strength. This work may provide some inspiration in preparing epoxy-polymercaptan-based PDLC films, which both have excellent E-O performance and good adhesion strength, towards roll-to-roll processes and large-scale flexible applications.
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页数：14
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