Epoxy matrices for filament-wound carbon fiber composites

✍ Scribed by Roger J. Morgan; Connie M. Walkup

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 995 KB
• Volume: 34
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1987.070340103

✦ Synopsis

Epoxies suitable for filament-winding fibrous composites must be processible at ambient temperatures, nontoxic, chemically simple, undergo full cure at s 100°C and, also, be tough and exhibit a TB > 120°C. In this paper, we report the cure characteristics, processibility, toxicity, and mechanical and physical properties of a number of amine-cured diglycidyl ether of bisphenol-A (DGEBA) epoxide candidate systems suitable for filament-wound carbon fiber composites. 2,5-Dimethyl-2.5-hexane diamine (DMHDA)-cured DGEBA epoxy was found to be the most promising candidate. The good processibility and thermal properties, togetber with the low cure characteristics of the DGEBA-DMHDA epoxy system, are discussed in t e r m of molecular structure of the arnine molecule. The network structural parameters that control epoxy toughness and subsequent ernbrittlement upon plastic flow are discussed. Evidence is presented for plastic flow-induced thermal and mechanical property deterioration of epoxles as a result of network chain scission.