作　　者： ; ; ; ; ; ;

机构地区： 华南理工大学聚合物新型成型装备国家工程研究中心聚合物成形加工工程教育部重点实验室

出　　处： 《工程塑料应用》 2009年第5期31-34,共4页

摘　　要： 采用电磁动态塑化挤出机挤出聚丙烯(PP)管材,通过爆破压力测试、拉伸性能测试、差示扫描量热(DSC)分析和X射线衍射(XRD)分析研究了振动频率和振幅对PP管材结构与力学性能的影响。力学性能测试结果表明,振动挤出PP管材的周向强度有了显著提高,实现了管材的双向自增强。与稳态挤出的PP管材相比,振动挤出PP管材的爆破压力最大提高了27.03%,轴向拉伸屈服强度最大提高了7.3%。DSC分析和XRD分析表明,振动挤出的PP管材结晶度提高,熔点升高,结晶完善,晶粒变小,有利于管材力学性能的提高。 The polypropylene （PP） pipes were extruded by an electromagnetic dynamic plasticating extruder. The influences of vibration frequency and amplitude on the mechanical properties and mierostructure of PP pipe were investigated by using bursting pressure testing, tensile testing, DSC analysis and XRD analysis. The mechanical properties testing results showed that the hoop strength of PP pipes increased significantly, and the biaxial self-reinforcement pipes could be obtained. Compared with the conventional specimens, the maximum increment of bursting pressure and tensile yield strength was 27.03% and 7.3% , respectively. DSC and XRD analysis showed that the PP pipes obtained by vibration extrusion had higher crystallinity, higher melting temperature, more perfect crystals and smaller crystal sizes. All these were very useful in enhancing the mechanical properties of PP pipes.

关 键 词： 聚丙烯 管材 振动力场 力学性能

领　　域： [化学工程] [金属学及工艺] [金属学及工艺]