Accession Number:

ADA470135

Title:

High Temperature Degradation of 5250-4 Polymer Resin

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH DEPT OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s):

Report Date:

2007-06-01

Pagination or Media Count:

99.0

Abstract:

5250-4 bismaleimide resin is used in high performance polymer matrix composites with high temperature aeronautical applications. This thesis investigated the thermal and oxidative degradation of 5250-4 neat resin powder in argon, air, and oxygen environments. The powder was aged at 163 deg. C, 177 deg. C, and 190 deg. C in all environments for at least 250 hours. Isothermal thermo-gravimetric analysis demonstrated that weight loss was negligible for aging in the argon environment, indicating weight loss is the result of an oxidative process at these temperatures. The 5250-4 powder exhibited an initial period of weight gain before eventually losing weight in both air and oxygen. The applicability of a closed loop oxidation scheme to 5250-4 gravimetric behavior was investigated. Kinetic parameters for the scheme were determined for the Air Force Research Laboratorys polymer matrix composite lifetime prediction modeling efforts.

Subject Categories:

  • Polymer Chemistry
  • Test Facilities, Equipment and Methods
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE