Nano-CaCO 3 can effectively improve the strength of foamed Polypropylene (PP), ethylene-octene copolymer (POE) can greatly enhance the toughness of PP, and PP-g-MAH can improve the compatibility of Nano-CaCO 3 with PP. The supercritical fluid-nitrogen (N 2 ) was used as physical foaming agent, and the PET film was selected to study the effect of POE content on the mechanical properties and cellular structure of PP/nano-CaCO 3 blends during combined in-mold decoration and microcellular injection molding (IMD/MIM) process. The results showed that the addition of POE did improve the impact strength of PP/nano-CaCO 3 composites, while the tensile strength and flexural strength decreased. On account of the characteristics of POE, the melt strength change of PP/nano-CaCO 3 blend system after POE’s addition was studied. The melt strength of the blend system decreased at first and then increased. It can be found that POE distrib...

中文翻译：

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POD对IMD / MIM过程中PP / Nano-CaCO 3复合材料力学性能和孔结构的影响

纳米CaCO 3可以有效提高发泡聚丙烯（PP）的强度，乙烯-辛烯共聚物（POE）可以大大提高PP的韧性，而PP-g-MAH可以提高纳米CaCO 3与PP的相容性。使用超临界流体氮（N 2）作为物理发泡剂，并选择PET膜以研究POE含量对组合模内装饰过程中PP / nano-CaCO 3共混物的机械性能和孔结构的影响和微孔注塑（IMD / MIM）工艺。结果表明，POE的添加确实提高了PP /纳米CaCO 3复合材料的冲击强度，而拉伸强度和弯曲强度却降低了。基于POE的特性，研究了POE添加后PP / nano-CaCO 3共混体系的熔体强度变化。共混体系的熔体强度先降低然后增加。可以发现POE分布...