Accession Number:

AD0684714

Title:

KINETIC ANALYSIS OF THERMOGRAVIMETRY. PART 2. PROGRAMMED TEMPERATURE

Descriptive Note:

Technical rept. Jan 1967-May 1968

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OH

Report Date:

1968-12-01

Pagination or Media Count:

86.0

Abstract:

A generally applicable method of obtaining kinetic parameters from temperature-programmed thermogravimetry is presented. Factors influencing the selection of a particular method for the numerous treatments reported in the literature are discussed in detail. The method of Friedman involving the use of several thermograms at different heating rates and determining Arhennius parameters at each percent conversion was chosen. The experimental procedure and a method of handling thermogravimetric analysis TGA data and calculations by computer are fully described. The application of the treatment to some specific polymer degradation systems is reported in order to illustrate the scope of the method and its potential usefulness in obtaining information concerning complex degradation mechanisms. Polytetrafluoroethylene, an aliphatic, and an aromatic polyamide were the polymers selected for this study.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE