【摘 要】
：
Polyimide (PI) is well-known as high-performance polymeric engineering material with excellent mechanical, thermal and electrical properties, so it has been widely used in many applications, such as m
【机 构】
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Institute of Chemistry,Chinese Academy of Sciences,Beijing,100190,China
【出 处】
：
Seventh International Symposium On Engineering Plastics (第七届
论文部分内容阅读
Polyimide (PI) is well-known as high-performance polymeric engineering material with excellent mechanical, thermal and electrical properties, so it has been widely used in many applications, such as microelectronics, mechanical and aerospace industries, etc.[1].As PI is generally insoluble in any solvents, it is thermally or chemically converted from precursor polyamic acid (PAA) dissolved in aprotic polar solvents such as N-methyl-2-pyrrolidone (NMP), N.N-dimethylacetamide (DMAc) and N,N-dimethylformamide (DM F)[2].The process involves simultaneous imidization, evaporation of residual solvent and crystallization, so it is very complicated and the final mierostructure and properties of PI f(i)lm highly depends on the process [3].
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