【摘要】 以过氧化二异丙苯(DCP)为主交联剂,松香酯为助交联剂,采用化学交联法对聚丙烯进行交联改性。分别测试DCP和DCP/松香酯交联体系下,PP的熔体质量流动速率-凝胶含量-抗熔断能力以及力学性能。结果表明,与单独使用DCP相比,DCP/松香酯交联体系使PP抗熔断能力延长了12 min,当DCP为2 phr时,PP的熔体质量流动速率减少了0.1 g/10min,凝胶含量提高了15%,冲击强度和拉伸强度分别增加了0.73 k J/m2、1.97 MPa。更多还原

【Abstract】 Polypropylene(PP) resin was cross-linked by chemical crosslinking method with dicumyl peroxide(DCP) as the major cross-linking agent and turpentine as the assistant crosslinker.In the absence and presence of turpentine,the melt flow rate,anti-sagging ability,gel content and mechanical properties of polypropylene were measured,respectively.The results show that DCP/turpentine crosslinking system prolongs the anti-sagging time of PP by 12 minutes.When adding 2 phr DCP in polypropylene,the maximal gel percentage of the cross-linked PP is improved by 15%,its impact strength is increased by 2.31 kJ/m~2,and its tensile strength increases by 1.97 MPa,compared with pure PP.更多还原