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1前言聚酰亚胺(polyim ide,PI)在已商品化的塑料中耐热性是最好的,其产品以超级工程塑料为代表。PI由美国杜邦公司于1960年开发成功并投入市场,先用于宇宙飞
1 Introduction Polyimides (PI) have the best heat resistance in commercialized plastics and their products are represented by super engineering plastics. PI by the United States DuPont in 1960 developed and put into the market, first for the space shuttle