arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0708.3050cond-mat.soft
收藏

非纠缠Polymer共混体系中的类纠缠链动力学

Entangled-like Chain Dynamics in Non-entangled Polymer Blends with Large Dynamic Asymmetry

Angel J. Moreno, Juan Colmenero

摘要:

我们讨论了一个简单的模型的模拟聚合物共混物的劳斯模型的框架。与标准预测不一致,两个组件之间的大的动态不对称性诱导强的非指数性的快速组件的劳斯模式。尽管链比纠缠长度短得多,但它也诱导了类似于交叉到纠缠状链动力学的动力学特征。这种不寻常的行为与强烈的记忆效应有关,这种记忆效应打破了作用在标记链上的外力与时间不相关的假设。

英文摘要:

We discuss simulations of a simple model for polymer blends in the framework of the Rouse model. At odds with standard predictions, large dynamic asymmetry between the two components induces strong non-exponentiality of the Rouse modes for the fast component. Despite chains being much shorter than the entanglement length, it also induces dynamic features resembling a crossover to entangled-like chain dynamics. This unusual behavior is associated to strong memory effects which break down the assumption of time uncorrelation of the external forces acting on the tagged chain.

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。

↑