ポリプロピレンの熱伝導率の圧力依存性
Pressure Dependence of Thermal Conductivity of Polypropylene
菊地時雄・長谷川 隆・渡部 修・小山清人
Kikuchi, Tokio / Hasegawa, Takashi / Watanabe, Osamu / Koyama, Kiyohito
In this paper, thermal conductivity of polypropylene (PP) was measured at various temperature and pressure, in order to obtain the basic data-base of the thermal properties of polymeric materials applicable for the precise simulation of injection molding processes. The measurement of the thermal conductivity was performed by using the transient hot-probe method, the probe of which was installed in the cylinder of a PVT measurement system. The obtained results were correlated with the resin temperature and pressure, and an empirical correlation was derived. Since this empirical correlation enables to estimate the thermal conductivity of PP continuously from the molten state to the solidified state, the behaviors of injection-molded polymer, such as warping and solidification, can be simulated more accurately by using so-called CAE (Computer-Aided Engineering) technique.
Key words: Thermal conductivity / Pressure dependence / Temperature dependence / Polypropylene / Transient hot-probe method