Synthesis and characterization of polyimide end-capped with fluorinated phenylethynylaniline

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	Synthesis and characterization of polyimide end-capped with fluorinated phenylethynylaniline
	Chen Jiansheng ; Li Zhongxiao ; Tao Zhiqiang ; Zuo Hongjun ; Fan Lin ; Yang Shiyong
刊名	ACTA POLYMERICA SINICA
	2007-03-01
期号	3 页码:235-239
关键词	Fluorinated Phenylethynylaniline Polyimide Pmr Thermal Property
ISSN号	1000-3304
英文摘要	A novel end cap 3-trifluoromethyl-4-(phenylethynyl) aniline (3FPA) was obtained by reduction of the corresponding nitro-compound which was synthesized by coupling of 2-trifluoromethyl-4-nitro-1-bromobenzene with ethynylbenzene.Polyimide monomer solutions were prepared by classic PMR process using p-phenylenediamine (pPDA), the diethyl ester of 4, 4'-hexafluoroisopropylidene-bisphthalic acid (6FDE) and 3-trifluoromethyl-4(phenylethynyl) aniline as endcap. The monomer solution has high solid contents of about 40%-45%, low viscosity of about 28 similar to 36 mPa-s and show high stability at room temperature in two months. The polyimide molding powders were produced by thermally curing the monomer solutions at 200 degrees C, and the imidization degree of powders increased with increasing the curing temperature. The thermosetted polyimides were produced by thermal curing the polyimide molding powders at 370 degrees C under pressure of 1 similar to 2 MPa. The postcured polyimide showed a 5% weight loss temperature of 536 degrees C and Tg about 404 degrees C (DMA) The thermo-oxidative stability of the thermosetted polyimides 3FPA-PI-50 and PMR-II resins at elevated temperature (370 degrees C) were determined by isothermally aging the samples in flowing air atmosphere, and the weight loss of 3FPA-PI-50 was about 6.78 wt% after 300 It isothermal aging which was lower than that of PMR-II (7.15%).
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000245189900005
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/61207]
专题	中国科学院化学研究所
通讯作者	Chen Jiansheng
作者单位	1.Chinese Acad Sci, Inst Chem, Adv Mat Lab, Beijing 100080, Peoples R China 2.Beijing Inst Graph Commun, Beijing 102600, Peoples R China
推荐引用方式 GB/T 7714	Chen Jiansheng,Li Zhongxiao,Tao Zhiqiang,et al. Synthesis and characterization of polyimide end-capped with fluorinated phenylethynylaniline[J]. ACTA POLYMERICA SINICA,2007(3):235-239.
APA	Chen Jiansheng,Li Zhongxiao,Tao Zhiqiang,Zuo Hongjun,Fan Lin,&Yang Shiyong.(2007).Synthesis and characterization of polyimide end-capped with fluorinated phenylethynylaniline.ACTA POLYMERICA SINICA(3),235-239.
MLA	Chen Jiansheng,et al."Synthesis and characterization of polyimide end-capped with fluorinated phenylethynylaniline".ACTA POLYMERICA SINICA .3(2007):235-239.