振动挤出对HDPE管材耐慢速裂纹增长性能的影响

Effect of Vibration Extrusion on Slow Crack Growth Resistance of HDPE Pipe

使用自制的电磁动态塑化挤出机挤出高密度聚乙烯(HDPE)管材。对稳态挤出和振动挤出的HDPE管材耐慢速裂纹增长性能进行了测试。采用DSC、WAXD分析研究了振动力场对HDPE管材耐慢速裂纹增长性能的影响。结果表明:振动挤出的HDPE管材结晶度提高,熔点升高,晶片变厚,晶粒尺寸变大,结晶完善,耐慢速裂纹增长性能提高。

HDPE pipe was extruded by a custom-made electromagnetic dynamic plasticating extruder. The slow crack growth resistance of HDPE pipe prepared by static extrusion and vibration extrusion was investigated. The influence of vibration force field on the slow crack growth of HDPE pipe was studied by DSC and WAXD analysis. The results show that HDPE pipe prepared by vibration extrusion has higher crystallinity, higher melting temperature, larger lamellar thickness, larger crystal size, and more perfect crystals, and the slow crack growth resistance of HDPE pipe is improved.