聚丙烯接枝改性及其挤出发泡研究
Studies of the Graft-modified Polypropylene and Its Foaming in Extrusion
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摘要: 以有机过氧化物为引发剂，以双螺杆挤出机为反应器，将线型不饱和聚酯(ULP)接枝到聚丙烯(PP)分子链上。通过FTIR、DSC及凝胶含量测试，对MPP的结构和性能进行了研究，表明PP发生了接枝反应；泷变性能和熔体流动速率(MFR)测定表明，接枝反应有效地改善了PP流变性能，用双螺杆挤出机对未接枝和接枝的PP进行了发泡研究，SEM分析表明接枝PP具有更好的发泡效果。Abstract: With organic peroxide as initiator, melt polypropylene(PP) was grafted with unsaturated linear polyester(ULP) in the twin-screw extruder. By means of FT-IR, DSC, gel content testing, it is proved that the grafting reaction occurrs on PP in extrusion. The
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