• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Post and prepolymerization strategies to develop novel photochromic poly(esterimide)s
【24h】

Post and prepolymerization strategies to develop novel photochromic poly(esterimide)s

机译：后和预聚合策略，以开发新型的光致变色聚（酰亚胺）

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper reports novel photoresponsive, processable poly(esterimide)s functionalized with the azobenzene and tricyanovinylene groups. Post and prepolymerization strategies were utilized for preparation of the new photochromic polymers with imide rings. The postpolymerization method of azopolymer synthesis included a functionalization of precursor poly(esterimide) containing dialkylaminophenyl groups with diazonium salt of aniline. The precursor poly(esterimide) was obtained from synthesized 2,2′[N- phenylethyloaniline-di(4-estro-1,2-dicarboxylic)]anhydride and 4,4′-methylene bis(2,6-dimethylaniline). The prepolymerization strategy based on polycondesation of 2,4-diaminoazobenzene with two dianhydrides, that is, with or without the azobenzene group. The new dianhydride with azobenzene unit was obtained. The reaction of post-tricyanovinylation was carried out for substitution of prepared polymers with tricyanovinylene groups. The synthesized polymers were characterized and evaluated by FTIR, 1H NMR, X-ray, UV-Vis spectroscopies, and DSC. The polymers exhibited glass transition temperatures in the range of 119-208°C and good solubilities in common organic solvents, providing optical-quality films. Thermal stability of the polymers films was investigated by UV-Vis spectroscopy. Preliminary investigations of the optical anisotropy in chosen poly(esterimide)s were carried out by photoinduced birefringence measurements. Relatively high photoinduced birefringence (Δn = 0.01) was measured for polyimide with covalently bonded azobenzene substituted with strong acceptor group.
机译：本文报道了用偶氮苯和三氰基亚乙烯基官能化的新型光响应性，可加工的聚（亚胺）。后聚合和预聚合策略用于制备具有酰亚胺环的新型光致变色聚合物。偶氮聚合物合成的后聚合方法包括将含有二烷基氨基苯基的前体聚（酯酰亚胺）与苯胺的重氮盐官能化。前体聚（酯酰亚胺）是从合成的2,2'[N-苯基乙基邻苯胺-二（4-雌-1,2-二羧酸）]酸酐和4,4'-亚甲基双（2,6-二甲基苯胺）获得的。基于2，4-二氨基偶氮苯与两个二酐的缩聚反应，即带有或不带有偶氮苯基的预聚合策略。获得了具有偶氮苯单元的新二酐。进行三氰基乙烯基化后的反应，以用三氰基亚乙烯基取代制备的聚合物。通过FTIR，1 H NMR，X射线，UV-Vis光谱和DSC对合成的聚合物进行表征和评估。该聚合物的玻璃化转变温度在119-208°C的范围内，并且在普通有机溶剂中具有良好的溶解性，从而提供了光学质量的薄膜。聚合物膜的热稳定性通过紫外-可见光谱研究。通过光致双折射测量，对所选聚（酰亚胺）中的光学各向异性进行了初步研究。对于具有被强受体基团取代的共价键合的偶氮苯的聚酰亚胺，测得相对较高的光致双折射（Δn= 0.01）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号