标题:
动态硫化PP/EPDM共混体系固化与结晶动力学研究Study on Solidification Behavior and
Crystallization Kinetics of Dynamically-Vulcanized PP/EPDM Blends
作者:
黄亮, 胡磊, 杨斌, 苗继斌, 夏茹, 钱家盛, 曹明
关键字:
动态硫化, PP/EPDM, 共混物, 二氧化硅, 结晶动力学Dynamic Vulcanization, PP/EPDM, Blend, SiO2, Crystallization Kinetics
期刊名称:
《Material Sciences》, Vol.4 No.5, 2014-09-26
摘要:
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.