抄録
In a preceding paper, the chemical resistance of the epoxy resin cured with 1, 3, 5-trichloro-1, 3, 5-tri (dimethylamino) cyclotriphosphazene (CL3) was investigated, and it was shown that the epoxy resin cured with CL3 was degradated by acid and was resistant to alkali. In this paper, the water resistance of EPIKOTE154 cured with CL3 has been investigated in detail and the effect of glass flake reinforcement has been also investigated. The results obtained are as follows:
(1) The curing reaction may proceed further in the presence of water. This is considered because the curing reaction of the EPIKOTE154/CL3 is difficult to proceed completely in an ordinary curing condition, and also because the cured epoxy resin is not degradated by water.
(2) When the epoxy resin was filled with glass flakes, the modulus of rigidity increased and the glass transition was observed at 15-25°C higher temperature. When the glass flakes were surface treated, the experimental results of the modulus of rigidity showed relatively good agreement with the theoretical prediction, in which the interfacial perfect adhesion between the glass and epoxy was assumed. On the other hand, when the glass flakes were not surface treated, the reinforcing effect was remarkably lower than that of the surface treated case.
(3) After the glass flake filled specimens were immersed into water, the effect of surface treatment vanished.
