Kinetics and Mechanisms of the Thermal Degradation of Polymers Using Time-of-Flight Mass Spectrometry for Continuous Gas Analysis
Abstract
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, as the result of reviewing earlier data. Calibration results were reported for seventeen compounds. Pumping coefficients for thirty three compounds were compared. Tests were carried out for new furnace systems in a more modern time- of-flight mass spectrometer, which was equipped with a differentially pumped region near the electron beam. Computer programs are in the process of being rewritten for a new computer and to permit greater flexibility in experimental technique and in data processing.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1970
- Accession Number
- AD0866814
Entities
People
- George A. Griffith
- Henry L. Friedman
Organizations
- General Electric