共聚聚丙烯拉伸流变性能研究  

Study on Extensional Rheology of Co-Polypropylenes

作　　者：王晶[1] 傅勇[1] 徐振明[1] 袁小亮[1] 左胜武[1] 

机构地区：[1]中国石化扬子石油化工有限公司南京研究院,江苏南京210048

出　　处：《现代塑料加工应用》2016年第2期9-11,共3页Modern Plastics Processing and Applications

摘　　要：采用双螺杆挤出方法,将3种共聚聚丙烯(PP)基料PPB,PPR和PPB-G按照不同配比进行共混。利用拉伸流变仪,研究了3种不同PP树脂的熔体强度和拉伸流变行为。通过与小中空制品聚乙烯专用料HHM5502对比,讨论了3种基料的熔体拉伸流变特征。结果表明:当PPB,PPR,PPB-G质量比分别为40∶20∶40和40∶35∶25时,可以得到同时具备高熔体强度和高熔体延展性的PP树脂,二者的熔体强度均大于0.17 N,熔体可拉伸比也均超过了5。The different percentages of the co-polypropylenes including PPB,PPR and PPB-G were prepared by the twin-screw extruder. The melt strength and extensional rheological behaviors of three kinds of co-polypropylenes were studied by extensional rhe-ometer.Compared to special resins of polyethylene HHM5502 used for small hollow products,the extensional rheological characteristics of these co-polypropylenes were dis-cussed.The results show that when m(PPB:PPR:PPB-G)is 40:20:40 or 40:35:25, the polypropylene with both high melt strength and high melt ductility is successfully at-tained.The melt strength is more than 0.17 N,and the melting drawing ratio is also more than 5 .

关 键 词：共聚聚丙烯 拉伸流变 熔体强度 拉伸比 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]