THE THERMAL AND ABLATIVE DEGRADATION OF SOME EPOXY RESINS CURED WITH METHYL BICYCLO(2.2.1)HEPTENE-2,3-DICARBOXYLIC ANHYDRIDE (NMA).
Abstract
The unusual two-step thermal degradation mechanism of epoxy resins cured with methyl bicyclo(2.2.1)heptene-2,3-dicarboxylic anhydride (NMA) was of NMA on the final epoxy system's chemical composition, crosslink density, thermal and ablative performance, and mechanism of degradation. Two mechanisms were elucidated for the initiation of thermal degradation of NMA cured epoxy resins. One, an acid-initiated mechanism which results in a splitting out of NMA from the resin structure, is operative up to 350 C. The other, a reverse Diels-Alder mechanism, is operative from 350 C and higher, especially under ablative conditions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 12, 1965
- Accession Number
- AD0475864
Entities
People
- Gerald J. Fleming
Organizations
- Naval Ordnance Laboratory