复合加工助剂对HDPE流变性能和力学性能的影响  

EFFECT OF BINARY PROCESSING AID ON RHEOLOGY AND MECHANICAL PROPERTIES OF HDPE

作　　者：孙光[1] 李惠林[1] 

机构地区：[1]高分子材料工程国家重点实验室四川大学高分子研究所,四川成都610065

出　　处：《高分子材料科学与工程》2006年第2期173-176,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金重点项目(50233010);国家基础研究专项经费(2005CB623800);教育部博士点基金资助项目(2003610057)

摘　　要：研究了聚乙二醇(PEG)/纳米二氧化硅复合助剂对HDPE流变行为和力学性能的影响,结果表明,PEG和纳米二氧化硅复合使用时具有协同效应,明显提高了对基体树脂的降黏性能,而且还可明显提高基体的拉伸强度、模量和断裂伸长率。The porous nano-SiO2 was blended with polyethylene glycol （PEG） to prepare binary processing aid and the effect of binary processing aid on the melt flow properties and mechanical properties were studied. On one band, it was exhibited by the experiments that the HDPE melt viscosity is increased by the addition of nano-SiO2 but is decreased by the addition of nano-SiO2/PEG binary processing aid or PEG. It was also found that the viscosity reduction of HDPE with addition of nano SiO2/PEG binary processing aid is significantly greater than that obtained with the addition of only PEG. On the other hand, the mechanical properties of HDPE are increased such as the tensile strength, young＇s modulus and elongation to break by adding nano- SiO2/PEG binary processing aid.

关 键 词：纳米二氧化硅 聚乙二醇 高密度聚乙烯 加工流变性 力学性能 

分 类 号：O631.21[理学—高分子化学]