聚醚酰亚胺/酚酞型聚醚醚酮共混体系相容性的稀溶液粘度法研究

STUDY OF MISCIBILITY OF POLY (ETHER IMIDE)/PHENOLPHTHALEIN POLY (ETHER ETHER KETONE) BLENDS BY DILUTE SOLUTION VISCOMETRY

近年来,有关高性能树脂聚酰亚胺共混物的研究日益引起人们的关注。已经发现许多种分子结构不同的聚酰亚胺之间,聚酰亚胺与聚苯并咪唑,或聚醚醚酮能形成完全相容的共混体系,从而扩大了高性能树脂聚酰亚胺的应用范围。 酚酞型聚醚醚酮(PEK-C)是由我所研究开发出的一种新型的聚醚醚酮类高性能树脂,它具有良好的可溶性,优异的机械强度和加工流动性,已广泛应用于结构材料及复合材料的制备。为进一步扩大该树脂的应用范围,本实验室在PEK-C共混物的研究做了大量的工作。本工作研究了聚醚酰亚胺(PEI)/PEK-C共混体系的相容性。PEI和PEK-C的分子结构如下:

The irascibility of a poly (ether imide)/phenolphthalein poly (ether ether ketone) blend was determined by viscometry. The results ob ained indicate that the Huggins coefficients of the blends exhibit positive deviation from simple additivity, while the inherent viscosities of the blends exhibit negative deviation. The a values of viscometry, calculated from these parameters are all >0. It is obvious that the blends are miscible within the whole composition range.