New Soluble Polyimides with High Optical Transparency and Light Color Containing Pendant Trifluoromethyl and Methyl Groups

作     者：汪称意 赵晓燕 李光 

作者机构：School of Material Science and EngineeringSchool of Petrochemical EngineeringChangzhou UniversityChangzhouJiangsu 213164China State Key Laboratory for Modification of Chemical Fibers'and Polymer MaterialsCollege of Material Science and EngineeringDonghua UniversityShanghai 201620China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2012年第30卷第7期

页      面：1555-1560页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：Acknowledgement This word was supported by the National Natural Science Foundation of China (No. 51103016)  Natural Science Foundation of Jiangsu Province (Nos. BK2011232 and BK2011241)  the Grant-in-aid for Youth Innovation Fundation of Changzhou University (Nos. ZMF 11020017 and ZMF 1102037)  and the Opening Project of State Key Laboratory for Modification of Chemical Fibers and Polymer Materials (No. LK1001) 

主　　题：fluorinated polyimides solubility optical transparency 

摘      要：A new aromatic diamine containing trifluoromethyl and methyl groups, namely a,a-bis（4-amino-3-methylphetayl）-4-（trifluoromethyl）phenylmethane （1）, was synthesized from 2-methylaniline and 4-（trifluoromethyl）- benzaldehyde. A series of fluorinated polyimides （PIs） were prepared from the diamine with four commercially available aromatic tetracarboxylic dianhydrides using a one-step high-temperature polycondensation procedure. These obtained PIs showed excellent solubility, with the dissolvability at a concentration of 10 wt% in most solvents, and they could afford flexible and strong films. Thin films of these PIs exhibited high optical transparency and light color, with the cutoff wavelength at 324-357 nm and transmittance higher than 74% at 450 nm. Moreover, these Pls possessed eminent thermal stability and good mechanical properties.