Accession Number : AD0454639

Title :   THE RELATIONSHIP BETWEEN STRUCTURE AND THERMAL STABILITY OF NEW HIGH TEMPERATURE POLYMERS.

Descriptive Note : Rept. for Jun 63-May 64,

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Friedman, H. L.

Report Date : AUG 1964

Pagination or Media Count : 41

Abstract : A research program aimed at obtaining quantitative relationships between structure and thermal stability of polymers was started. Kinetic criteria are to be used as a measure of stability. Two types of experimental methods were used to generate data for kinetic analysis. A vacuum thermobalance was developed for this program. Although reproducible thermograms resulted, this method was found to have several shortcomings. Time-of-flight mass spectrometric analysis of decomposition gases during heating through a linear rate of temperature rise was found to be much more suitable. Both methods were applied to four polybenzimidazoles. Calibration experiments are being carried out for the purpose of converting the mass spectra to quantitative yields of specific products. The effects of momentum transfer in vacuum thermogravimetry are also being investigated. (Author)

Descriptors :   (*HEAT RESISTANT PLASTICS, BENZIMIDAZOLES), (*BENZIMIDAZOLES, POLYMERS), STABILITY, HEAT, REACTION KINETICS, DECOMPOSITION, MASS SPECTROSCOPY, PYROLYSIS, THERMOCHEMISTRY, LABORATORY EQUIPMENT, INSTRUMENTATION, HALOCARBON PLASTICS, SPECTRUM ANALYZERS, GAS ANALYSIS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE