芳烯
缩聚物
热重分析
化学
高分子化学
热稳定性
单体
双酚
碳酸二苯酯
玻璃化转变
聚合物
低聚物
有机化学
酯交换
催化作用
烷基
芳基
环氧树脂
作者
Bassam A. Sweileh,Yusuf Al‐Hiari,Mohammed H. Kailani,Hani A. Y. Mohammad
出处
期刊:Molecules
[Multidisciplinary Digital Publishing Institute]
日期:2010-05-18
卷期号:15 (5): 3661-3682
被引量:31
标识
DOI:10.3390/molecules15053661
摘要
This work presents a new synthetic approach to aromatic and aliphatic polycarbonates by melt polycondensation of bisphenol A diacetates with alkylene- and arylenediphenyl dicarbonates. The diphenyl dicarbonates were prepared from phenyl chloroformate and the corresponding dihydroxy compounds. The process involved a precondensation step under a slow stream of dry argon with the elimination of phenyl acetate, followed by melt polycondensation at high temperature and under vacuum. The potential of this reaction is demonstrated by the successful synthesis of a series of aromatic-aromatic and aromatic-aliphatic polycarbonates having inherent viscosities from 0.19 to 0.43 dL/g. Thus low to intermediate molecular mass polymers were obtained. The 13C-NMR spectra of the carbon of the carbonate group showed that the formed polycarbonates contain partial random sequence distribution of monomer residues in their chains. The polycarbonates were characterized by inherent viscosity, FTIR, 1H-NMR and 13C-NMR spectroscopy. The glass transition temperatures, measured by DSC, of the polycarbonates were in the range 13–108 ºC. The thermogravimetric curves of showed that these polymers have good thermal stability up to 250 ºC. The present approach may open the door for novel polycarbonates containing other organic functional groups.
科研通智能强力驱动
Strongly Powered by AbleSci AI