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arXiv 0903.2095cond-mat.soft
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单根半柔性Polymer链的拉伸动力学和线性粘弹性行为

Tension Dynamics and Linear Viscoelastic Behavior of a Single Semiflexible Polymer Chain

T. Hiraiwa, T. Ohta

摘要:

本文基于Hallatschek等人发展的蠕虫链模型理论,研究了单根半柔性高分子链的动力学响应。作用在两个链端的振荡力下的线性粘弹性响应解析地导出作为振荡频率的函数。我们将证明,在低频极限下,复柔度的实部与Marko和Siggia的静态结果一致,而虚部则表现出+1/2的幂律依赖性。另一方面,这些顺应性随着高频极限的幂律-7/8而减小。这些都不同于劳斯动力学。一个缩放参数来理解这些新的结果。

英文摘要:

We study the dynamical response of a single semiflexible polymer chain based on the theory developed by Hallatschek et al. for the wormlike-chain model. The linear viscoelastic response under oscillatory forces acting at the two chain ends is derived analytically as a function of the oscillation frequency . We shall show that the real part of the complex compliance in the low frequency limit is consistent with the static result of Marko and Siggia whereas the imaginary part exhibits the power-law dependence +1/2. On the other hand, these compliances decrease as the power law -7/8 for the high frequency limit. These are different from those of the Rouse dynamics. A scaling argument is developed to understand these novel results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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