Universal Time and Length Scales of Polar Active Polymer Melts,ACS Macro Letters

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Universal Time and Length Scales of Polar Active Polymer Melts
ACS Macro Letters ( IF 5.1 ) Pub Date : 2024-08-30 , DOI: 10.1021/acsmacrolett.4c00423
Mattia Alberto Ubertini ₁ , Emanuele Locatelli _{2,

3} , Angelo Rosa ₁

Affiliation

We present an in-depth multiscale analysis of the conformations and dynamics of polar active polymers, comparing very dilute and very dense conditions. We unveil characteristic length and time scales, common to both dilute and dense systems, that recapitulate the conformational and dynamical properties of these active polymers upon varying both the polymer size and the strength of the activity. Specifically, we find that a correlation (or looping) length characterizes the polymer conformations and the monomer dynamics. Instead, the dynamics of the center of mass can be fully characterized by the end-to-end mean-square distance and by the associated relaxation time. As such, we show that the dynamics of individual chains in melts of polar active polymers is not controlled by entanglements, but only by the strength of the self-propulsion.

中文翻译：

极性活性聚合物熔体的通用时间和长度尺度

我们对极性活性聚合物的构象和动力学进行了深入的多尺度分析，比较了非常稀和非常稠密的条件。我们揭示了稀和稠密系统所共有的特征长度和时间尺度，它们在改变聚合物尺寸和活性强度时概括了这些活性聚合物的构象和动力学特性。具体来说，我们发现相关（或循环）长度表征了聚合物构象和单体动力学。相反，质心的动力学可以通过端到端均方距离和相关的弛豫时间来完全表征。因此，我们表明极性活性聚合物熔体中各个链的动力学不受缠结控制，而仅受自推进强度控制。

更新日期：2024-08-30

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