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研究了聚丙烯/皂化乙烯-乙酸乙烯共聚物/马来酸酐接枝聚丙烯(PP/EVAL/PP-g-MAH)动态硫化体系的力学性能、相形态、结晶性能和动态机械性能。结果表明:PP-g-MAH能显著改善PP/EVAL动态硫化体系的力学性能和熔体流动速率(MFR)。当PP/EVAL/PP-g-MAH质量比为80/20/8时,材料的冲击强度较不加PP-g-MAH时提高了179.6%,达到74.1 kJ/m2,MFR为13.4 g/10min。PP-g-MAH能有效改善分散相的分散效果和两相相容性,并同时促进PP/EVAL动态硫化体系中PP的α晶和β晶的形成。PP-g-MAH的加入使PP/EVAL动态硫化体系中PP组分的Tg向低温方向移动。
The mechanical properties, phase morphology, crystallinity and dynamic mechanical properties of PP / EVAL / PP-g-MAH dynamic vulcanizates were investigated. The results show that PP-g-MAH can significantly improve the mechanical properties and melt flow rate (MFR) of PP / EVAL system. When the mass ratio of PP / EVAL / PP-g-MAH was 80/20/8, the impact strength of the material was increased by 179.6%, reaching 74.1 kJ / m2 and the MFR was 13.4 g / 10min with PP-g- . PP-g-MAH can effectively improve the disperse phase dispersion effect and two-phase compatibility, and at the same time, promote the formation of α and β crystals of PP in the dynamic vulcanization system of PP / EVAL. The addition of PP-g-MAH causes the Tg of the PP component in the PP / EVAL dynamic vulcanization system to move towards lower temperature.