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聚丙烯(PP)是结晶性聚合物,熔体强度低,发泡性能差。为了提高PP的微孔发泡性能,首先将PP和聚乙烯(PE)共混,然后在PP/PE共混体系中加入少量EPDM,研究EPDM的质量含量对PP/PE共混体系熔体强度和最终泡孔结构的影响,分析机理,寻找能够提高PP熔体强度和改善发泡性能的材料。
Polypropylene (PP) is a crystalline polymer with low melt strength and poor foaming properties. In order to improve the microporous foaming properties of PP, PP and polyethylene (PE) were firstly blended and then a small amount of EPDM was added into the PP / PE blend system to study the effect of the mass content of EPDM on the melt strength of PP / PE blend system And the final cell structure, analyze the mechanism, look for materials that can increase the PP melt strength and improve foaming properties.