Polypropylene is one of the most important commodity polymers. The application of polypropylene, however, has been limited by its high flammability, tendency to brittleness at temperatures below its glass transition temperature and low stiffness particularly at elevated temperatures. Recently, polypropylene has been incorporated both by elastomer and by rigid filler for the automotive applications, because the modified polypropylene showed excellent mechanical properties. In this study, the crystallization behavior and the crystal orientation of the PP/EPR/Talc blends were investigated by DSC and x-ray diffractometer. To evaluate the effect of the EPR molecular weight and the talc content on the rate of PP crystallization which affects the crystal orientation of polypropylene, the non-isothermal crystallization of PP/EPR/Talc blends were studied. The change of the crystal orientation of polypropylene with the variation of the orientation of talc in PP/EPR/Talc blends was investigated. The effect of the crystal orientation on the impact strength was also studied.
