A Constitutive Equation for Polymer Melts Based on Partially Extending Strand Convection
A Constitutive Equation for Polymer Melts Based on Partially Extending Strand Convection
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基于部分延伸链对流的聚合物熔体本构方程
DOI：
10.1122/1.549761
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发表时间：
1984
影响因子：
3.3
通讯作者：
R. Larson
中科院分区：
文献类型：
--
作者：
R. Larson
本文提出了一个有前途的新的聚合物熔体本构方程，一个包含洛奇或上对流麦克斯韦模型和一个很好的近似的Doi-Edwards模型作为特殊情况。上随体麦克斯韦模型是最基本的模型之一，而Doi-Edwards模型可能是最肯定建立在分子原理上的模型。这里提出的差分模型是基于分子推理，特别适合商业化的高度支化的熔体，如低密度聚乙烯。该模型背后的想法是，长的侧支可以限制聚合物链能够在Doi和Edwards假设的限制性管状区域内收缩的程度。
A promising new constitutive equation for polymer melts is herein presented, one that contains both the Lodge or upper‐convected Maxwell model and a good approximation to the Doi‐Edwards model as special cases. The upper‐convected Maxwell model is one of the most basic while the Doi‐Edwards model is the one perhaps most surely founded on molecular principles. The differential model presented here is based on molecular reasoning that should be particularly well suited to commercial, highly branched melts such as low‐density polyethylene. The idea behind the model is that long side branches can limit the extent to which a polymer strand is able to contract back within the confining tubelike region postulated by Doi and Edwards.