增容对回收PET/PP共混物的结晶与熔融行为的影响

摘要

The recycled poly (ethylene terephthalate) /polypropylene (r-PET/PP) blends were prepared with different compatibilizers. The differential scanning calorimetry (DSC) was used to investigate the effect of compatibilizers on crystallization and melting behavior of r-PET, the effect of r-PET on crystallization and melting behavior of PP and the effect of compatibilizers on crystallization and melting behavior of r-PET/PP blends. The results indicated that the crystallization temperatures of PP increased with increasing r-PET contents and the crystallization temperatures of r-PET decreased with increasing PP contents. Addition of compatibilizers significantly decreased the crystallization temperatures of neat r-PET and r-PET component in the blends. However , the different compatibilizers had no influence on the crystallization and melting behavior of blends and the crystallization behavior of PP in the blends depend on the kinds of compatibilizers.%制备了不同相容剂增容回收PET/PP共混物,用DSC方法研究了相容剂对r-PET结晶与熔融行为的影响,r-PET对PP结晶与熔融行为的影响和相容剂对r-PET/PP共混物结晶与熔融行为的影响,观察到PP结晶温度随着r-PET含量增加而提高,r-PET结晶温度随着PP含量增加而降低,相容剂加入明显降低共混物中r-PET结晶温度,但不同相容剂对共混物中r-PET结晶与熔融行为影响不大,共混物中PP结晶性能与相容剂的大分子链有关.