Polymer and Materials Science
Wiley InterScience Backfile Collection 1832-2000
Chemistry and Pharmacology
The reaction of cycloaliphatic and glycidylic oxiranes with primary amines was examined; no reaction was observed for the former. From unsymmetrical cycloaliphatic glycidylic imide derivatives and primary amines, it was possible to obtain well defined epoxy-terminated biscycloaliphatic resins containing imide rings, which were identified by 13C NMR spectroscopy and elemental analysis. These epoxy resins were crosslinked by simple heating without hardeners and epoxide/amine-networks were obtained. The action of phthalic anhydride as curing agent gave different results depending on the nature of the starting cycloaliphatic group. Thus, while tetrahydrophthalimide derivatives, N-(2,3-epoxypropyl)perhydro-4,5-epoxyphthalimide (2), underwent crosslinking, nadimide derivatives, N-(2,3-epoxypropyl)-5,6-epoxybicyclo [2.2.1] heptane-2,3-dicarboximide (1) did not react. Differential scanning calorimetry was used to follow the reaction; in all the cases, only the dynamic method was applied, in order to obtain kinetic parameters. The values for activation energies are comparable to those reported for the curing of epoxide systems.
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