種々のアミンで硬化したエポキシ樹脂の機械的性質

概要

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Ethylenediamine, hexamethylenediamine, ortho-, meta-, para-phenylenediamines and 2, 2-diamino-4, 4, 6, 6-tetraphenoxy-cyclo-triphosphazene were used as the curing agents of an epoxy resin. Mechanical properties of the cured epoxies were determined by the dynamic mechanical measurements and uniaxial tensile tests as a function of temperature. To increase the Young's modulus and the glass transition temperature of the epoxy resin, aromatic amines are more effective than aliphatic amines, and the amines with short distances between amino groups are also effective. The amino-phosphazene investigated in this paper is effective to increase the room temperature Young's modulus. However, it is not effective to increase the glass transition temperature of the epoxy resin, because of the steric hindrance during the curing reaction. The resistances of the epoxy resin to the immersion into water, HCl and NaOH aqueous solutions were also investigated.
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