Correlation of thermal analysis data and hydrolysis resistance of polycarbonates |
| |
Authors: | Z Dobkowski E Rudnik |
| |
Institution: | (1) Industrial Chemistry Research Institute, Warsaw, Poland |
| |
Abstract: | The initial activation energy at zero conversionE o of thermooxidative decomposition has been taken as a measure of thermal stability of polycarbonates (PC) andE o has been correlated with the relative hydrolysis rater h as a measure of their hydrolyse resistance. It is suggested that both decomposition processes are initiated by the same mechanism, the attack of hydrolytic agent onto ester C?O bonds. The following values ofE o have been found: 187 (PC-M)>87 (PC-A)>43 (PC-C) kJ/mol, and they are correlated with values ofr h being 0.01 (PC-M)<1 (PC-A)<4.4 (PC-C). It has been found, using a computer modeling technique, that bothE o andr h depend on the minimized energy of conformations. |
| |
Keywords: | activation energy of decomposition polycarbonates rate of hydrolysis |
本文献已被 SpringerLink 等数据库收录! |
|