Viscosity model for polydisperse polymer melts
Viscosity model for polydisperse polymer melts
复制标题
多分散聚合物熔体的粘度模型
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
I. Manas‐Zloczower
中科院分区：
文献类型：
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作者：
D. Nichetti;I. Manas‐Zloczower
用一个简单的叠加模型来描述线性聚合物体系的分子量分布与剪切粘度之间的关系。使用统计分布函数拟合分子量分布的凝胶渗透色谱数据。然后采用一个简单的叠加模型来计算所研究的系统的剪切粘度。计算了多分散性对流动曲线形状的影响。该模型的简单性使得其在聚合物加工设备中遇到的复杂几何形状的数值模拟中的使用成为可能。本研究还揭示了一些光在聚合物系统中的纠缠和解纠缠现象之间的关系。
A simple superposition model was used to define the relationship between molecular weight distribution and shear viscosity for linear polymeric systems. Gel permeation chromatography data for molecular weight distributions were fitted using statistical distribution functions. A simple superposition model was then employed to calculate the shear viscosity for the systems investigated. The effect of polydispersity on the shape of the flow curves was calculated. The simplicity of the model makes feasible its use in numerical simulations of complex geometries as encountered in polymer processing equipment. The present study also sheds some light on the relationship between entanglement and disentanglement phenomena in polymeric systems.