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共缩聚型可溶性聚酰亚胺的合成与性能研究(1) 被引量:18

STUDY ON THE SYNTHESES AND PROPERTIES OF SOLUBLE, CO-CONDENSATION TYPE POLYIMIDES (1)
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摘要 采用3,3′-二甲基-4,4′-二氨基二苯甲烷,4,4′-二氨基二苯醚或4,4′-二氨基二苯甲烷为共缩聚二胺单体与二苯醚3,3′-,4,4′-四酸二酐进行缩聚制备共缩聚型聚酰亚胺。当3,3′-二甲基-4,4′-二氨基二苯甲烷与4,4′-二氨基二苯醚的摩尔比为10∶0~4∶6或3,3′-二甲基-4,4′-二氨基二苯甲烷与4,4′-二氨基二苯甲烷的摩尔比在10∶0~5∶5时,所得聚酰亚胺可溶解于强极性有机溶剂。所得可溶性聚酰亚胺在NMP中的特性粘度在0.87~1.45dL/g.它们在氮气中的热降解起始温度在504℃以上,并且在研究范围内与共聚二胺的结构及比例无明显关系。 Cocondensation type polyimides were prepared by using 3,3′-dimethyl-4,4′-diamino diphenylmethane and 4,4′-diamino diphenylether or 4,4′-diamino diphenylmethane as the co-diamine monomers and diphenylether-3,3′,4,4′-tetracarboxylic acid dianhydride as the dianhydride monomer. The polyimides were observed to be soluble in strong polar solvents only when the molar ratio of 3,3′-dimethyl-4,4′-diamino diphenylmethane and 4,4′-diamino diphenylether was 10∶0-4∶6, or that of 3,3′-dimethyl-4,4′-diamino diphenylmethane and 4,4′-diamino diphenylmethane was 10∶0-5∶5. The intrinsic viscosity of soluble polyimides in NMP was observed to be 0.87-1.45 dL/g. The thermal decomposition temperature of soluble polyimides in N_2 was observed to be above 504 ℃ and almost independent of the structure and molar ratio of the co-diamine monomers studied.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 1998年第2期28-30,共3页 Polymer Materials Science & Engineering
关键词 聚酰亚胺 可溶性 共缩聚 性能 合成 polyimide, soluble, co-condensation
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