拉伸诱导的流体动力学屏蔽变化对非缠结聚合物溶液线团-拉伸滞回的影响
软凝聚态物质
2020-07-03 v1
摘要
柔性聚合物溶液的拉伸流变测量与布朗动力学模拟证实了基于 blob 概念的预测，即拉伸流中的线团-拉伸滞回随浓度增加而增大，在临界交叠浓度 处达到最大值，随后在半稀溶液区逐渐消失。这些观察结果表明，在稀溶液中，链段拉伸增强了分子间的流体动力学屏蔽，而在半稀溶液中则削弱了该屏蔽。因此，流场可以强烈改变聚合物溶液粘弹性质的浓度依赖性。
引用
@article{arxiv.1609.01796,
title = {Effect of stretching-induced changes in hydrodynamic screening on coil-stretch hysteresis of unentangled polymer solutions},
author = {Ranganathan Prabhakar and Chandi Sasmal and Duc At Nguyen and Tam Sridhar and J. Ravi Prakash},
journal= {arXiv preprint arXiv:1609.01796},
year = {2020}
}
备注
6 pages (twocolumn), 3 figures, supplementary material, submitted to Phys. Rev. Lett