振动注塑对IPP／HDPE共混物力学性能和凝聚态结构的影响  

EFFECTS OF VIBRATION INJECTION ON MECHANICAL PROPERTIES AND MORPHOLOGY STRUCTURE OF IPP/HDPE COMPOSITES

作　　者：刘方辉[1] 钱心远[1] 宋之敏[2] 朱计[1] 申开智[1] 张杰[1] 

机构地区：[1]四川大学高分子科学与工程学院,高分子材料工程国家重点实验室,成都610065 [2]四川大学分析测试中心,成都610065

出　　处：《工程塑料应用》2009年第9期41-44,共4页Engineering Plastics Application

基　　金：国家自然科学基金项目(50873072、50803038);国家基础研究专项经费项目(2005CB623800);国家重点实验室专项经费项目

摘　　要：研究了振动频率、振动压力对等规聚丙烯/高密度聚乙烯(IPP/HDPE)共混物力学性能和凝聚态结构的影响。结果表明,与未施加振动的静态试样相比,振动试样的力学性能得到提高。随着振动压力的提高,低频率振动试样的力学性能呈明显上升趋势;振动频率对低振动压力试样的力学性能影响较小。在试样的表层及次表层,聚合物晶体沿熔体流动方向均有明显的取向。而对于试样芯层,则只有在成型温度为190℃、振动频率为0.23 Hz、振动压力为90 MPa的条件下才能观察到明显的晶体取向。Effects of vibration frequency and vibration pressure on the mechanical properties and morphology structure of IPP/ HDPE blends were studied. The results showed that the mechanical properties of vibration samples were much higher than those of static samples. With increasing of vibration pressure, the mechanical properties of low-frequency vibration samples rose obviously. The effect of vibration frequency on mechanical properties was relatively less. The polymer crystals in surface and subsurface of sample oriented obviously along the flowing direction while for the core of samples, the polymer crystals oriented under certain conditions （ T = 190℃, f=0.23 Hz, P =90 MPa）.

关 键 词：振动 注射成型 等规聚丙烯 高密度聚乙烯 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] O327[理学—一般力学与力学基础]