热塑性聚氨酯-聚酰亚胺合金的制备及其性质研究  

Investigation on Thermoplastic Polyurethane-Polyimide Blends

作　　者：陈江宁[1] 张峻峰[1] 陈东琛[1] 华子春[1] 余学海[2] 

机构地区：[1]南京大学医药生物技术国家重点实验室,南京210093 [2]南京大学高分子科学与工程系,南京210093

出　　处：《南京大学学报（自然科学版）》2001年第1期131-134,共4页Journal of Nanjing University（Natural Science）

摘　　要：A novel type of polyurethane and polyether-polyimide blends were prepared in two steps. The first step was the preparation of polyether-amic acid by the reaction of an oligmer based on polytetramethylene oxide glycol di-p-aminobenzoate (APTMO) of different molecular weight with benzenetetracarboxylic acid dianhydride (PMDA). The second step was mixing polyether-polyurethane and polyether-polyamic acid solution at room tem- perature in various weight ratios and the blend films were obtained by casting and then heating imidization .In- frared spectroscopy, dynamic mechanical analysis,differential scanning calorimetry,, wide-angle X-ray diffraction and sham-sires testing were used to study this family of blends. DMA and DSC results show that the blends exhibit a well phase-separated morphology and possess a wide range of service temperature, which varies with the PU content. The thermal stability of PU is found to increase obviously by the incorporation of PI. The excellent tensile properties of the blends suggest that they could be potentially ed as heat resistant thermoplastic elas-tomers.A novel type of polyurethane and polyether-polyimide blends were prepared in two steps. The first step was the preparation of polyether-amic acid by the reaction of an oligmer based on polytetramethylene oxide glycol di-p-aminobenzoate (APTMO) of different molecular weight with benzenetetracarboxylic acid dianhydride (PMDA). The second step was mixing polyether-polyurethane and polyether-polyamic acid solution at room tem- perature in various weight ratios and the blend films were obtained by casting and then heating imidization .In- frared spectroscopy, dynamic mechanical analysis,differential scanning calorimetry,, wide-angle X-ray diffraction and sham-sires testing were used to study this family of blends. DMA and DSC results show that the blends exhibit a well phase-separated morphology and possess a wide range of service temperature, which varies with the PU content. The thermal stability of PU is found to increase obviously by the incorporation of PI. The excellent tensile properties of the blends suggest that they could be potentially ed as heat resistant thermoplastic elas-tomers.

关 键 词：聚氨酯 聚酰亚胺 高分子合金 相形态 性质 制备 工程材料 

分 类 号：TB333[一般工业技术—材料科学与工程]