高剪切应力对PP/PS/EPDM材料力学性能的影响  

Effect of the High Shear Stress on Mechanical Properties of PP/PS/EPDM Blends

作　　者：李怀栋[1] 钱岑 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009 [2]南京白云化工环境监测有限公司,江苏南京210047

出　　处：《塑料工业》2013年第2期93-96,共4页China Plastics Industry

摘　　要：采用在材料熔融挤出共混过程中提高双螺杆挤出机螺杆转速的方法,研究了较高螺杆转速条件下双螺杆挤出机的机械剪切应力对聚丙烯(PP)/聚苯乙烯(PS)/三元乙丙橡胶(EPDM)共混材料力学性能的影响。结果表明:双螺杆挤出机的高剪切应力可促进PS颗粒的分散和界面结合力的增强,促使共混材料力学性能的改善。EPDM对PP/PS共混材料具有增容增韧作用,在220℃的挤出温度下,当螺杆转速由240 r/min提高至1 200 r/min时,其PP/PS/EPDM(质量比81/9/10)共混材料的缺口冲击强度最高达22.0 kJ/m2,。The effect of high shearing stress of the twin screw extruder on the mechanical properties ot PP/PS/EPDM blends was investigated by increasing the screw rotation speed during melt extruding process. The results showed that the high shearing stress of the twin screw extruder can accelerate the distribution of PS particles and enhance the interfacial bonding strength. The compatibility of PP/PS could be improved with the EPDM. In the extrusion temperature of 220 ℃, when the screw rotation speed increased from 240 r/min to 1 200 r/min, the Izod impact strength of the PP/PS/EPDM （81/9/10 wt% ） blends was up to 22. 0 kJ/m2.

关 键 词：聚丙烯 聚苯乙烯 三元乙丙橡胶 剪切应力 共混 力学性能 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]