耐热聚乙烯的加工性能  

Processing properties of PERT

作　　者：马小伟[1] 乔亮杰[2] 莫明[1] 胡廷芳[1] 杨帆[1] Ma Xiaowei;Qiao Liangjie;Mo Ming;Hu Tingfang;Yang Fan(Dushanzi Petrochemical Research Institute of CNPC,Xinjiang Rubber Materials Laboratory,Karamay 833699,China;Dushanzi Ethylene Plant of CNPC,Karamay 833699,China)

机构地区：[1]中国石油天然气股份有限公司独山子石化分公司研究院,新疆橡塑材料实验室,新疆维吾尔自治区克拉玛依市833699 [2]中国石油天然气股份有限公司独山子石化分公司乙烯厂,新疆维吾尔自治区克拉玛依市833699

出　　处：《合成树脂及塑料》2017年第4期77-80,共4页China Synthetic Resin and Plastics

摘　　要：采用高压毛细管流变仪、旋转流变仪和哈克转矩流变仪等研究了几种市售典型的耐热聚乙烯(分别记作PERT-1,PERT-2,PERT-3,PERT-4)的加工性能。结果表明:PERT-4的熔体流动速率(MFR)较低,属于高密度聚乙烯,其他3种PERT的MFR均在0.60 g/10 min左右,属于中密度聚乙烯;PERT-1,PERT-2,PERT-3的相对分子质量分布(M_w/Mn)较窄,PERT-4的M_w/Mn宽,且有较明显的大分子拖尾;各试样在170~205℃条件下的加工稳定性较好;PERT-4对剪切速率最敏感,但对温度敏感性较差,PERT-1的剪切黏度随温度升高降幅最大。The processing properties of market available polyethylene-raised temperature(PERT)materials,which include PERT-1,PERT-2,PERT-3,and PERT-4,were characterized by high pressure capillaryrheometer,rotational rheometer and HAAKE torque rheometer.The results show that PERT-4is categorized ashigh density PE due to its low melt flow rate(MFR),and MFR of the rest of PERT materials average0.60g/10min,which represent medium density PE.The relative molecular weight distribution(Mw/Mn)of PERT-1,PERT-2,PERT-3are narrow,while PERT-4has wide Mw/Mn with obvious macromolecular tailing.The processing propertiesof these samples are stable from170to205℃.PERT-4is most sensitive to shear rate,while its temperaturesensitivity is poor.The shear viscosity of PERT-1falls most steeply with the increase of temperature.

关 键 词：耐热聚乙烯 管材 加工性能 流变性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]