Abstract
Silicone-containing polyamide-imides were prepared from bis(p-chlorocarbonylphenyl)diphenylsilane (BCCDPS), pyromellitic dianhydride(PMDA) and diamines. The thermal characteristics of the above polymers had been carefully studied using a thermogravimetric analyzer. The thermal stability of polymer was decreased with increasing contents of bis(p-carbonylphenyl)diphenylsilane units(BCDPS). The effect of diamine on thermal stability of polymer led benzidine > m-phenylenediamine> 4,4'-diaminodiphenyl ether > 4,4'-diaminodiphenyl sulfone. The activation energy of degradation of polymer obtained by Friedman method increased as the contents of BCDPS in the polymer decreased. The degradation temperature of polymers generally increased as the activation energy increased. The solubility of polymer increased as the content of BCDPS increased except polymers prepared with benzidine.
bis(p-chlorocarbonylphenyl)diphenylsilane (BCCDPS)과 pyromellitic dianhydride(PMDA) 및 몇가지의 디아민으로부터 실리콘을 함유하고 있는 폴리아미드-이미드를 합성하였다. 열중량분석기를 이용하여 합성한 중합체의 열적성질을 조사하였으며 Friedman 방법으로 중합체 열분해 반응의 활성화에너지를 구하였다. 중합체 분자내의 bis(p-carbonylphenyl)diphenylsilane units(BCDPS) 단위의 함량이 증가할수록 열안정성과 열분해 반응의 활성화에너지값은 감소하였으나 용매에 대한 용해성은 증가하였다.