Soluble fluoro-polyimides derived from 1,3-bis(4-amino-2-trifluoromethyl- phenoxy) benzene and dianhydrides

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• 作者：Xie ; K. ; Liu ; J.G. ; Zhou ; H.W. ; Zhang ; S.Y. ; He ; M.H. ; Yang ; S.Y.
• 关键词：Fluoro-containing diamine ; Soluble polyimides ; Polycondensation
• 刊名：Polymer
• 出版年：2001
• 出版时间：August, 2001
• 年：2001
• 卷：42
• 期：17
• 页码：7267-7274
• 全文大小：161 K

文摘

Soluble fluoro-polyimides have been synthesized by reacting of a fluorine-containing aromatic diamine, 1,3-bis(4-amino-2-trifluoromethylphenoxy) benzene(diamine 3), with aromatic dianhydrides to yield poly(amic acid)s which were then cyclized to yield polyimide by either thermal or chemical imidization method. The new tri-aromatic ring diamine, with trifluoromethyl groups at β position of amine group and bridged by ether bonds, was obtained by reduction of the corresponding dinitro-compound which was synthesized by coupling of 2-chloro-5-nitro-1-trifluoromethylbenzene with 1,3-hydroquinone in presence of strong base. Homogeneous and stable polyimide solutions with >12–15wt. % of solid content were obtained. High quality and purity polyimide films have been prepared which exhibited excellent thermal stability, low moisture absorption and high hygrothermal stability.