Accession Number:

ADA220775

Title:

Thermal Analysis of Acetylene Terminated Sulfone (ATS) Resin

Descriptive Note:

Final rept. Jan 1981-Jun 1983

Corporate Author:

AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH

Report Date:

1990-01-18

Pagination or Media Count:

229.0

Abstract:

A number of new thermo-analytical techniques for the elucidation of kinetic and mechanistic aspects of the decomposition of thermally stable polymers under high vacuum conditions are described herein, with particular reference to their use in conjunction with more conventional techniques of organic structural analysis to gain a more comprehensive insight into the degradation process. In addition to general procedures, some approaches geared specifically to the thermal analysis of acetylene terminated sulfone ATS resins are also detailed. A compositional analysis of volatiles flashed from thin films of ATS-G prepolymer is used to assess the purity of the feedstock used to prepare ATS-G, and to propose the existence of some preparative side reactions. A brief description of the cure process of ATS-G is followed by a more complex study of the post cure step and its overlap with low temperature degradations in the polymer. Finally, a fairly comprehensive mechanism of accelerated high temperature thermal degradation of ATS-G and its component fractions. With particular reference to the influence of the sulfone linkage as a relatively unstable thermal weak link, and the polyene crosslink or its thermal derivative on the weight loss processes operative within the basic polyphenylether constituent of the polymer.

Subject Categories:

  • Physical Chemistry
  • Polymer Chemistry
  • Laminates and Composite Materials
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE