トリクロロトリジメチルアミノシクロトリホスファゼンによるエポキシ樹脂の硬化と機械的性質

概要

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1, 3, 5-trichloro-1, 3, 5-tridimethylamino-cyclotriphosphazene obtained from hexachloro-cyclotriphosphazene was used as a curing agent for epoxy resins. Epoxy resins (EPIKOTE828 and 154) were precured at 120°C for 7 hours. EPIKOTE828 was postcured at 140°C for 4 hours; EPIKOTE154 was postcured at 140°C for 5 hours followed by 200°C for 30 minutes. Dynamic viscoelastic measurements and tensile tests were conducted on the cured epoxy resins. The results were compared with those of epoxy resins cured by aminophosphazenes and m-phenylene diamine2). Although the glass transition temperature (Tg) was relatively low, these epoxies exhibited higher Youngs modulus (30°C-Tg) and higher elongation (around Tg) than the epoxies investigated in the preceding paper2). Besides, in the thermo-gravimetric analysis, the epoxies cured by the present curing agent showed higher weight remaining in the range of 500-700°C. These results suggest that trichloro-tridimethylamino-cyclotriphosphazene has peculiar potential as a curing agent of the epoxy resins which can be used for load-bearing and fire-resistant applications.