캐필러리 레오미터를 이용한 고분자의 PvT 측정 방법

In injection molding processes, the property of molten resin should be characterized accurately. Among severalproperties, the PvT state is the most important one, since it affects the shrinkage, warpage, molded weight, and the partdensity. Thus, the PvT data is crucial to the simulation of the injection molding process. This work shows how such ameasurement can be performed for a semi-crystalline and amorphous polymers. The PvT measurement has been conductedusing a capillary rheometer using a suitable accessory that blocks the capillary. The results have shown that the PvT datacan be obtained using such a rheometer and then the PvT coefficients of the Tait equation can be reached.