Accession Number:

ADA422141

Title:

The Characterization of the Structure-Property Relations of Electron Beam Cured Composites

Descriptive Note:

Final rept. 1 Feb 2001-31 Dec 2003

Corporate Author:

TEXAS ENGINEERING EXPERIMENT STATION COLLEGE STATION

Personal Author(s):

Report Date:

2004-03-01

Pagination or Media Count:

17.0

Abstract:

The ultimate objective of this program was to develop a fundamental understanding of the relations between the processing parameters, the resultant physical and chemical structure and the performance of E-beam cured polymer matrix composites for cryogenic fuel containment structures for future Air Force space operations vehicles. The S-beam induced cure mechanisms for cationic polymerized epoxides and free radical polymerized bismaleimides BMI were characterized in terms of processing variables, dissociation chemistry of the catalytic initiators, and inherent absorbed moisture. A general S-beam resin and composite cure model was developed as a function of S-beam processing variables. Stress-thermal cycling of BMI- Carbon fiber composites under cryogenic fuel simulated environments revealed that there is a high probability of microcracking with increasing number of thermo-cycles, higher pre-strain and humidity.

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE