结晶态双酚A型聚碳酸酯固相缩聚的研究

摘要

High molecular weight bisphenol—A polycarbonate (BAPC) was respectively synthesized by solid state polycondensation with crystalline and amorphous bisphenol—A polycarbonate prepolymer in a solid phase reactor. The bisphenol—A polycarbonate was characterized by DSC and FTIR spectroscopy. The results showed that bisphenol—A polycarbonate glass transition temperatures increased after solid state polycondensation, while its thermal stability enhanced. In addition, the polycondensation temperature of crystalline prepoymer was lower than that of amorphous. The polycondensation synthesized by crystalline bisphenol—A polycarbonate was amorphous.%在自制的反应器中将结晶态、无定形两种双酚A型聚碳酸酯(BAPC)预聚体固相缩聚合成了高摩尔质量的双酚A型聚碳酸酯.采用DSC、IR对双酚A型聚碳酸酯(BAPC)的熔融行为和结构进行了表征.结果表明,BAPC在固相缩聚后,玻璃化转变温度升高,热稳定性增强,其中BAPC为结晶态时固相缩聚的温度低于无定形态BAPC的固相缩聚温度,且结晶态BAPC固相缩聚后为无定形态.