THE EFFECT OF EPOXY RESIN AND CURING AGENT STRUCTURE ON ABLATIVE PROPERTIES.

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Abstract:

The reported is the second phase of a correlation of the chemical and physical properties of a polymer with its ablative properties See AD-467 049 for phase I. Epoxide resins and curing agents were employed as model systems. Thermogravimetric analysis, cross-link density studies, infrared spectroscopy and alpha-rod testing in the oxyacetylene burner facility were employed in the evaluation of the various systems. Amine cured epoxide structures produced high char rates 7.1 to 21.0 milssec and low times to 200C 33 to 47 sec. Certain anhydride cured epoxides, namely methyl bicyclo 2.2.1 heptene-2,3-dicarboxylic anhydride NMA and 3,3,4,4-benzophenone tetracarboxylic dianhydride BTCD were found to give good performance with low char rates 2.2 to 5.0 milssec and high times to 200C 91 to 101 sec. Epoxides with a polyphenyl backbone gave the best overall performance, although resorcinol diglycidyl ether performed well also. Resin purity was found to be fairly critical in regard to ablative performance. Author

Author(s):
Fleming, Gerald J.
Author Organization(s):
NAVAL ORDNANCE LAB WHITE OAK MD
Descriptive Note:
Interim rept., Jul 64-Jul 65,
Pagination:
0032

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NOLTR-66-124
Project Number(s):
RRMA-03-043/212-1/R007-04-01
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*EPOXY RESINS, *ABLATION), AGING(MATERIALS), ADDITIVES, AMINES, ANHYDRIDES, THERMOGRAVIMETRIC ANALYSIS, CROSSLINKING(CHEMISTRY), INFRARED SPECTRA, PYROLYSIS, COMBUSTION PRODUCTS, IMPURITIES, MOLECULAR STRUCTURE
Field(s)/Group(s):
Polymer Chemistry
Report Date:
1966 Sep 12