Resolving the mystery of the chain friction mechanism in polymer liquids.
Resolving the mystery of the chain friction mechanism in polymer liquids.
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DOI：
10.1103/physrevlett.102.248301
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发表时间：
2009-06
影响因子：
8.6
通讯作者：
A. Sokolov;K. Schweizer
中科院分区：
文献类型：
--
作者：
A. Sokolov;K. Schweizer
基于空间非均质动力学导致的大分子尺度扩散与局部结构弛豫解耦，我们提出了一种解释聚合物熔体中长期存在的链摩擦微观机制和时间-温度叠加失效的方法。所提出的物理图像也与理解非聚合玻璃形成液体中的动态波动和解耦现象、晶体生长速率和粘性溶剂中的蛋白质活性有关。
We propose an explanation for the long-standing puzzles of the microscopic mechanism of chain friction and the failure of time-temperature superposition in polymer melts based on decoupling of macromolecular scale diffusion from local structural relaxation due to spatially heterogeneous dynamics. The proposed physical picture is also relevant for understanding some aspects of dynamic fluctuation and decoupling phenomena in nonpolymeric glass-forming liquids, crystal growth rates, and protein activity in viscous solvents.