Processing–crystallization kinetics–morphology relationships in injection molding of PP and GFRPP

The dynamic crystallization model proposed in our previous work was applied to the simulation of crystallization kinetics and morphology of PP and PP/glass fiber composite (GFRPP) in injection molding process. The cooling rate was very rapid in the processing, either in the core or in the skin region of thin disc part, so that the crystallization would take place at low temperatures and the size of spherulites was small. However, the ultimate crystallinity of PP could always be obtained since the crystallization rate of PP was extremely fast. Prediction of the crystallization morphology from the dynamic model agreed well with the experimental observation, which indicated that our proposed model could give a good estimation of processing–crystallization kinetics–morphology relationships for PP and GFRPP.