利用双酚A双肉桂酸酯光敏单体在线偏振紫外光作用下发生光交联反应,制备了光控取向膜.制备过程更为简单,不需要高温热处理过程.液晶分子的排列方向与入射紫外光偏振方向垂直.通过紫外光谱和红外光谱分析了光化学反应过程,链聚合反应与异构反应相比,链状聚合反应对于液晶的排列起重要作用.利用偏振红外光谱对取向膜的有序度值计算发现,有序值较小.利用Cano盒测试了方位锚定能的大小为1.28 ×10-6J/m2.取向膜的热稳定性可以达到90℃.
参考文献
| [1] | Kunihiro Ichimura, Yasuzo Suzuki, Takahiro Seki,et al.Reversible change in alignment mode of nematic liquid crystals regulated photochemically by command surfaces modified with an azobenzene monolayer[J]. Langmuir, 1988,4(5): 1214-1216. |
| [2] | Schadt M, Seiberle H, Schuster A. Optical patterning of multidomain liquid-crystal displays with wide viewing angles[J].Nature, 1996,381 (6579): 212-215. |
| [3] | Liu J, Liang X, Tang H, et al.Allyl p-fluor cinnamate grafted polysiloxane photoalignment films polymerized under linear polarized UV light[J].Thin Solid Films, 2001,384(2): 212-214. |
| [4] | Akiyama H, Iimura Y. Azimuthal anchoring properties of nematic liquid crystal on UV-exposed polyimide layers[J].Jap.J. Appl. Phys., 2002,41(5A): L521-L523. |
| [5] | 梁兆颜,宣丽,杨柏梁,等.光控取向弱锚定表面的液晶分子排列[J]. 液晶与显示,2000,15(1): 53-59. |
| [6] | 闫石,梁兆颜,黄锡珉. 聚甲基丙烯酸肉桂酰氧基乙酯的光控取向研究[J].液晶与显示,1997,12(4):237-243. |
| [7] | 彭增辉,于涛,乌日娜,等.光敏小分子单体链聚合物诱导液晶分子排列的研究[J].液晶与显示,2003,18(1):14-17. |
| [8] | 于涛,彭增辉,乌日娜,等.光敏聚酰亚胺(BTDA-TMMDA)的光控取向[J].液晶与显示,2003,18(3):93-96. |
| [9] | Sato Y,Sato K,Uchida T.Relationship between rubbing strength and surface anchoring of nematic liquid crystal[J].Jap.J. Appl.Phys.,1992,31:579-581. |
| [10] | Egerton P L,Pitts E, Reisner A. Photocycloaddition in solid poly(vinyl cinnamate). The photoreactive polymer matrix as an ensemble of chromophore sites [J].Macromolecules, 1981,14(1):95-100. |
| [11] | Ichimura K, Akita Y, Akiyama H, et al. Photoreactivity of polymers with regioisomeric cinnamate side chains and their ability to regulate liquid crystal alignment[J]. Macromolecules, 1997,30 (4): 903-911. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%