【摘要】 室温下，通过溶液酰亚胺法使 3，3’－二甲基－4，4’－二氨基二苯甲烷与 3，3’，4，4’－二苯醚四羧酸二酐（ODPA）和 3，3’，4，4’－二苯酮四羧酸二酐（BTDA）进行缩聚反应，制备了一种可溶性的主链带侧基的聚酰亚胺。这种聚酰亚胺很容易溶解于诸如 NMP、DMAC 和 DMF 等强极性溶剂。 通过对其成品膜的可溶性、热稳定性、动态机械性能的初步分析，知道其具有良好的热稳定性和机械性能：热分解温度超过了 500℃，200℃ 以下其贮能模量超过 108 Pa。从 DMA 图中观测到其 g 大约为 250℃。因此，通过溶液缩聚制得的这种带侧基的聚酰亚胺薄膜具有许多良好的性能，可以被用在诸多方面。更多还原

【Abstract】 Soluble polyimides were prepared by a condensation of flexible diamine monomer with a substituent,3,3’-bimethyl-4,4’-diaminodiphenylmethane and 3,3’,4,4’-oxydiphthalic anhydride (ODPA),or 3,3’,4,4’-benzophenonetetracarboxylic dianhydride(BTDA) followed by the solution imidation at room temperature .Polyimides thus obtained are soluble in strong polar solvents, such as NMP, DMAc and DMF. Some elementary study was done in the solubility, the heat stability and the dynamic mechanical analysis of the film. It was also observed that the soluble polyimides obtained have excellent thermal property and mechanical character. The thermal decomposition temperatures were above 500℃ and the storage modulus were greater than 10 Pa under 200℃.And the Tg of this polyimides was about 250℃observed through the spectrum of dynamic mechanical analysis. Therefore, the polyimide film with side group preparation by solution polycondensation has many good performance and it can be used in varies aspects.更多还原