光异构化
材料科学
光致变色
偶氮苯
丙烯酰氯
玻璃化转变
异构化
热稳定性
聚合物
高分子化学
光化学
有机化学
丙烯酸酯
化学
单体
复合材料
纳米技术
催化作用
作者
Chang Hong Ge,Feng Qiu,Xiao Xian Gu,Dong Ya Yang
出处
期刊:Materials Science Forum
日期:2010-11-01
卷期号:663-665: 41-44
标识
DOI:10.4028/www.scientific.net/msf.663-665.41
摘要
A novel azobenzene optically polymer (P-DA) was synthesized based on the azo chromophore molecule, chiral reagent L(-)-tartaric acid, acryloyl chloride and methacrylate. The P-DA was characterized by FT-IR, UV-Vis spectroscopy, 1H NMR, DSC and TGA. The P-DA had high thermal stability up to its glass-transition temperature (Tg) of 110 oC and 5 % heat weight loss temperature of 199 oC. The UV-induced trans/cis photoisomerization and reflex-isomerization behaviors were investigated. The results indicated that the P-DA solution could undergo photochromism after irradiated by 365 nm UV light. The optical parameters: refractive index (n), the dielectric constant (ε) and thermal volume expansion coefficient (β) of P-DA were obtained. The thermo-optic coefficients are one order of magnitude larger than those of the inorganic materials, such as SiO2 (1.1×10−5 oC -1 and LiNbO3 (4×10−5 oC -1) and was larger than the organic material such as polystyrene (-1.23×10-4 oC -1) and PMMA (-1.20×10-4 oC -1). The conclusion had a little significance to develop optical communication.
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