Kinetics and Mechanisms of Thermal Degradation of Polymers Using Time-of-Flight Mass Spectrometry for Continuous Gas Analysis.

摘要

Research was continued using mass spectrometric thermal analysis (MTA) to study the thermal degradation of various polymers. Several samples of bis benzimidazo benzophenathroline (BBB) polymer and its ladder (BBL) polymers were successfully subjected to MTA. Quantitative results were obtained for ordinary and end-capped BBL polymers,and the effects of end-capping were discussed. BBB runs were carried out in modified fashions that allowed greater frequency of scanning of a limited mass range. The effects of varying the frequency were discussed. The results for BBL polymers and for the present and earlier BBB polymers were compared. A discussion on some aspects of the mechanism of thermal degradation of aliphatic polyesters was included. (Author)