Non-isothermal crystallization behavior of molten polypropylene catalloys(PP-c) was studied by using differential scanning calorimetry(DSC). Besides, crystallization process and spherulite morphology were observed thr...Non-isothermal crystallization behavior of molten polypropylene catalloys(PP-c) was studied by using differential scanning calorimetry(DSC). Besides, crystallization process and spherulite morphology were observed through polarized optical microscopy. Compared with pure polypropylene(PP), the crystallization peak temperature(t p c) of PP-c shifted to a higher temperature, and the value of t p c became bigger with the increase of ethylene component in PP-c. The spherulitic geometrical dimension of PP-c decreased distinctly, and the number of spherulite augmented obviously. It is believed that the ethylene component acts as the heterogeneous nucleation agent in PP-c.展开更多
文摘Non-isothermal crystallization behavior of molten polypropylene catalloys(PP-c) was studied by using differential scanning calorimetry(DSC). Besides, crystallization process and spherulite morphology were observed through polarized optical microscopy. Compared with pure polypropylene(PP), the crystallization peak temperature(t p c) of PP-c shifted to a higher temperature, and the value of t p c became bigger with the increase of ethylene component in PP-c. The spherulitic geometrical dimension of PP-c decreased distinctly, and the number of spherulite augmented obviously. It is believed that the ethylene component acts as the heterogeneous nucleation agent in PP-c.
