HDPE/E-TMB共混物熔体的流变行为研究

Rheological Behavior of HDPE/E-TMB Blend Melt

用自制增韧母料(ETMB)与高密度聚乙烯(HDPE)通过热机械共混制得增韧高密度聚乙烯(HDPE/ETMB)共混物,用高压毛细管流变仪对此类共混物的流变行为进行了研究。结果表明,HDPE/ETMB共混物为假塑性流体;表观粘度随剪切速率和切应力的增大而减小,并随温度的升高而降低;粘流活化能随剪切速率的增大和母料中乙丙弹性体含量的增加均呈逐渐减小的趋势。

Toughened HDPE/E-TMB blend was prepared by means of thermal mechanical blending of selfmade toughening masterbatch E-TBM with HDPE, and the theological behavior of the prepared blend was studied by means of capillary rheometer. The results showed the melt of the blend was a pseudoplastic fluid, the apparent viscosity of the blend decreased with the increases of the shear rate and shear stress, and decreased with the rise of temperature. The △ Eη of the blend tend to decrease with the increases of shear rate and the content of ethylenepropylene elastomer in the masterbatch.