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高爽滑线性低密度聚乙烯包装膜用树脂的流变性能

Petrochemical Technology & Application(2010)

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Abstract
应用毛细管流变仪、旋转流变仪和高压毛细管流变仪,对国产和进口高爽滑线性低密度聚乙烯(LLDPE)包装膜用树脂进行了流变性能分析。结果表明,国产试样的动态、稳态、毛细管流变性能与进口试样相当;国产与进口试样的零切黏度分别为4 871,4 768 Pa.s,二者标准偏差分别为4.509,6.332,与后者相比,前者相对分子质量高;国产试样的拉伸黏度和熔体强度均低于进口试样;170℃国产试样的非牛顿指数为0.23,大于进口试样(0.22)。
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Key words
linear low-density polyethylene,tensile viscosity,melt strength,rheological property,non-Newtonian index,apparent viscosity
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