Time-temperature dependence behavior of physical aging on creep behavior of PC

摘要

Thermoplastic resin and its FRTP were practically used without post cure treatment and aging treatment which is called "molded material". For such materials, it is known that creep behavior and physical aging occur simultaneously. And the effect of physical aging has the time and temperature dependency. The effect was occurred on the materials after molded, and the effect saved on the materials as the thermal history. This history has big influence on mechanical properties especially creep properties. Therefore, it is necessary to stay in control of the progress of the physical aging. In this report, the creep deformation of Polycarbonate (PC) was researched to grasp the effect of physical aging on creep behavior. It was clearly that the effect had the time and temperature dependency by two shift factors, and it had the same tendency as density. Using these relationships between the shift factors and density, it must be able to calculate the effect of thermal history as physical aging since the materials were molded by density.