液晶与显示, 2015, 30 (3): 404, 网络出版: 2015-06-25   

添加剂对高双折射液晶紫外稳定性影响

Effect of additive agents on ultraviolet stability of high birefringence liquid crystals
作者单位
1 石家庄诚志永华显示材料有限公司, 河北 石家庄 050091
2 河北省平板显示材料工程技术研究中心, 河北 石家庄 050091
摘要
高双折射液晶在液晶显示中具有重要的应用价值,但是由于分子结构中含有不饱和共轭结构,在紫外下不稳定,本文对高双折射液晶紫外不稳定的问题进行了研究.首先在混晶母体A中分别加入几种不同结构的添加剂三苯氧膦、丙基双环己基甲醛、丙基苯(3,5-2F)溴苯、UV-P,搅拌使其溶解均匀,将液晶灌入TN-7.0-R测试盒,在紫外下曝光后测试混晶的各项参数.实验结果表明:UV-P明显提高了高双折射液晶的抗紫外性能,因为UV-P的紫外吸收光谱带与高双折射液晶母体A的紫外吸收光谱带最接近.
Abstract
The high birefringence liquid crystals have important applications in LCD,but they are instable under UV exposure due to the conjugated unsaturated structures.The ultraviolet stability of high birefringence liquid crystals was studied in this paper.First,several different additives were added to the liquid crystal mixture A,such as triphenylphosphine oxide,4’-propylbi(cyclohexane)-4-formaldehyde,4-propyl-4’-cyclopentyl-3,5-difluorobiphenyl and UV-P.The liquid crystal mixtures were poured into TN-7.0-R test cells after stirred uniformly,then the test cells were exposed to ultraviolet,finally the liquid crystal parameters were tested.The results show that the UV stability of liquid crystal A can be significantly improved by UV-P,because the UV absorption of UV-P is most similar with liquid crystal A.

王永青, 贵丽红, 丰景义, 张冠超, 邸玉静, 王明霞. 添加剂对高双折射液晶紫外稳定性影响[J]. 液晶与显示, 2015, 30(3): 404. WANG Yong-qing, GUI Li-hong, FENG Jing-yi, ZHANG Guan-chao, DI Yu-jing, WANG Ming-xia. Effect of additive agents on ultraviolet stability of high birefringence liquid crystals[J]. Chinese Journal of Liquid Crystals and Displays, 2015, 30(3): 404.

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