The differences in the structures and properties of the wide-distribution polyethylene pipe resins(GC1 and GC2)produced by Hostalen(double-reactor tandem)and Hostalen ACP(three-reactor tandem)slurry polymerization process were investigated by high temperature gel permeation chromatograph(GPC),differential scanning calorimeter(DSC),universal tensile testing machine,impact testing machine,and dynamic mechanical analyzer(DMA).The results show that GC2 produced by the three-reactor tandem has a larger average molecular weight,a wider molecular weight distribution,a higher relative content in the high molecular weight fraction((M)w>106),and a higher comonomer content.Besides,the impact strength and tensile strength of GC2 are higher.GC2 has stronger creep resistance and better processing fluidity at the high shear rate.
维普
万方数据