Synthesis of 1,4-Bis(3-amino-5-trifluoromethylphenoxy)benzene and Properties of the Polyimide Film Therefrom
Firstly,1,4-bis(3-nitro-5-trifluoromethylphenoxy)benzene(Ⅰ) was synthesized through the nucleophilic substitution reaction of 3,5-dinitrobenzotrifiuoride and 1,4-dihydroxybenzene in the presence of potassium carbonate.Then,the diamine monomer 1,4-bis(3-amino-5-trifluoromethylphenoxy)benzene (Ⅲ) was obtained through the catalytic reduction with hydrazine and Pd/C.These fluorinated polyimides (PI) were synthesized from the fluorinated diamine Ⅱ with four kinds of dianhydrides,including pyromellitic dianhydride (PMDA),3,3,4,4-biphenyltetracarboxylic acid dianhydride (BPDA),3,3,4,4-oxydiphthalic anhydride (ODPA) and 3,3,4,4-benzophenonetetracarboxylicdianhydride (BTDA) respectively,via thermal imidization ofpoly(amic acid) (PAA).The structure and properties of these obtained fluorinated PIs were characterized.These experimental results showed that these fluorinated PI films exhibited excellent optical transmittance in the visible region and thermal resistance.The PI derived from ODPA showed the best optical transparency with the transmittance higher than 85.38 % at 450 nm.These PIs also exhibited good thermal properties with 5 wt% thermal decomposition temperature above 533 ℃.
1,4-bis(3-amino-5-trifluoromethylphenoxy)benzene polyimides synthesis structure and properties
YunHua Lu Bing Wang GuoYong Xiao ZhiZhi Hu
185 Qianshan Zhong Road, Anshan, Liaoning, China, School of chemical engineering, University of science and technology Liaoning
国际会议
昆明
英文
297-300
2012-10-12（万方平台首次上网日期，不代表论文的发表时间）