高抗冲聚丙烯材料的制备

PREPARATION OF HIGH-IMPACT POLYPROPYLENE

采用过氧化物引发剂与助交联剂组合对聚丙烯(PP)进行交联改性。研究了加工工艺、引发剂和助交联剂对改性效果的影响。结果表明,当选用交联剂A1和助交联剂B,且其用量分别为0.05％和1.0％时,在双螺杆挤出机上进行反应挤出,得到了高抗冲聚丙烯材料,在保持其它力学性能良好的前提下,它的悬臂梁缺口冲击强度高达356J/m,为纯共聚聚丙烯的3倍多。

Polypropylene (PP) was modified by peroxide initiator and assistant crosslinker. The influence of the process technology, initiator and assistant crosslinker on the mechanical properties of the modified PP was studied. The results showed that when 0. 05% initiator Al and 1.0% assistant crosslinker B were added, high-impact PP was prepared by twin-screw extruder. The modified PP had good mechanical properties. Its notched Izod impact strength was particularly high to 356 J/m, as over three times as that of pure PP.