通过动态硫化方法制备了聚丙烯/三元乙丙橡胶(PP/EPDM)共混体系，研究了不同橡塑比、SiO2添加量等因素对PP/EPDM共混体系的力学性能、导热及结晶动力学的影响。研究表明，随着EPDM含量增加，共混物冷却速率较纯PP有显著提高；随着EPDM的加入，使得PP半晶时间(t1/2)显著缩短，EPDM在共混体系的冷却结晶过程中对PP具有良好的成核促进作用。 The PP/EPDM blends were prepared using dynamical vulcanization. The effects of different plas-tic/rubber ratios, content of SiO2 on the mechanical properties, thermal conductivity as well as crystallization kinetics were intensively investigated. Our findings showed that the cooling rate of the PP/EPDM blends increased with increasing EPDM content. With the addition of EPDM, the crystallization half time (t1/2) was shortened, suggesting that the existence of EPDM phase was fa-vorable to the improvement on PP nucleation during the cooling period from melt state.
Gupta, N.K., Nagpal, A.K. and Jain, A.K. (2000) Dynamically vulcanized blends of polypropylene (PP) and ethylene propylene diene (EPDM)—A toughening mechanism. Journal of Polymeric Materials, 17, 393-410.
Yang, B., Xia, R. and Miao, J.-B. (2013) Probing solidification kinetics of high-density polyethylene during injection molding using an in-situ measurement technique. Polymer Testing, 32, 202-208.
