Abstract
In this study, noticing foaming temperature as the factor, which controls thermodynamic instability for creating cells of microcellular plastics(MCP),the effect of foaming temperature on cell size and cell density of MCP was investigated. Concretely, two foaming methods were employed ; one is the elevated temperature method that grows up cells by raising temperature after decompression in the foaming process, the other is the constant temperature method in which the temperature is already kept at high temperature before the decompression. As results, although cell density of foamed plastics becomes large and average cell size becomes small, the maximum cell size becomes large by the elevated temperature method. On the other hand, although the maximum cell size becomes small, average cell size becomes large by the constant temperature method.
