Temperature shifting of convergent flow measured effective elongational viscosity

Collier JR.; Petrovan S.; Patil P.

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Temperature shifting of convergent flow measured effective elongational viscosity

机译：会聚流的温度变化测得的有效伸长粘度

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The effective elongational viscosity data on a series of polyolefins as a function of temperature are shifted to a reference temperature using the approach for shifting shearing viscosity data. The temperature shift factors are obtained from complex and capillary shear rheology, and these are the same factors used for shifting the shear rheology. A Carreau rheological model was used to determine the zero shear rate viscosity at different temperatures, and an Arrhenius expression was used to determine the temperature shift factors. The same shift factors are shown to produce separate master curves for shear and elongational rheology at reference temperatures. The commercial grades of polyolefins studied include an extrusion grade of polypropylene and metallocene and conventionally catalyzed low and high density polyethylene materials. (C) 2002 Wiley Periodicals, Inc. [References: 21]

机译：使用移位剪切粘度数据的方法，将一系列聚烯烃上的有效伸长粘度数据作为温度的函数转移到参考温度。从复杂的剪切流变学和毛细管剪切流变学中获得温度变化因子，这些是用于改变剪切流变学的相同因素。使用Carreau流变模型确定在不同温度下的零剪切速率粘度，并使用Arrhenius表达式确定温度漂移因子。在参考温度下，显示出相同的位移因子可生成剪切和伸长流变学的独立主曲线。所研究的商业级聚烯烃包括聚丙烯和茂金属的挤出级以及常规催化的低密度和高密度聚乙烯材料。（C）2002 Wiley Periodicals，Inc. [参考：21]

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《Journal of Applied Polymer Science》 |2003年第9期|共10页
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Collier JR.; Petrovan S.; Patil P.;
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正文语种 eng
中图分类高分子化学（高聚物）;
关键词
Elongational viscosity; Semihyperbolic die; Shift factor; Master curve; Temperature shifting; Activation energy for flow; Low density polyethylene; High density polyethylene; Polypropylene; Oxide monohydrate solutions; Polymer melts; Polyethylene melts; Rheology; Behavior; Shear;

机译：伸长粘度;半双曲线模;位移因子;主曲线;温度变化;流动的活化能;低密度聚乙烯;高密度聚乙烯;聚丙烯;一水合氧化物溶液;聚合物熔体;聚乙烯熔体;流变学;性能;剪切力;

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机译：会聚流的温度变化测得的有效伸长粘度
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Temperature shifting of convergent flow measured effective elongational viscosity

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