General rigid bead‐rod theory explains polymer viscoelasticity from macromolecular orientation. By means of general rigid bead‐rod theory, we relate the normal stress differences of polymeric liquids to the branch position on a backbone branched macromolecule. In this work, we explore the first normal stress differences coefficients of different axisymmetric polymer configurations. When non‐dimensionalized with the zero‐shear first normal stress difference coefficient, the normal stress differences depend solely on the dimensionless frequency. In this work, in this way, we compare and contrast the normal stress differences of macromolecular chains that are branched. We explore the effects of branch position, length, functionality, spacing, and multiplicity, along a straight chain, in addition to rings and star‐shaped macromolecules in small‐amplitude oscillatory shear flow.

中文翻译：

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小振幅振荡剪切流中的聚合物分支和第一正应力差

一般的刚性珠棒理论从大分子取向解释了聚合物的粘弹性。通过一般的刚性珠棒理论，我们将聚合物液体的法向应力差与骨架支链大分子上的支链位置联系起来。在这项工作中，我们探索了不同轴对称聚合物构型的第一法向应力差系数。当使用零剪切第一法向应力差系数进行非量纲化时，法向应力差仅取决于无因次频率。在这项工作中，通过这种方式，我们比较和对比了分支的大分子链的法向应力差。我们沿着直链探索分支位置，长度，功能，间距和多重性的影响，