/sup 13/C study of the potential influence of thermal aging on the molecular integrity of FEFO

Abstract

A /sup 13/C NMR study of isothermally aged FEFO (75/sup 0/C, 300 hr) produced no evidence of molecular instability of the material, up to this temperature. /sup 13/C analysis of acetone extracts of thermally aged LX-09 produced no definitive evidence as to the molecular instability of this system.

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