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Brownian dynamics of grafted polymer chains: time dependent properties

机译:接枝聚合物链的布朗动力学:时间依赖性

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摘要

Results of computer simulations of polymer layers consisting of chains grafted by one end on an unpenetrable plane are presented. Characteristics of translational and rotational motion of different chain segments and correlation functions of chain radii were calculated both for single layers at different grafting densities 5 and for two interacting layers at different distances D between parallel grafting planes. Two values of grafting density were used in the latter case. The behavior of different correlation times as function of s and D and the interplay between the interpenetration of the brushes and rotational and translational motion are discussed. Both relaxation functions and mean square displacements are discussed in terms of stretched exponentials, and the behavior of the resulting "Kohlrausch exponents" γ is presented in detail.
机译:给出了由在不可穿透的平面上的一端接枝的链组成的聚合物层的计算机模拟的结果。对于不同接枝密度5的单层和平行接枝平面之间不同距离D的两个相互作用层,都计算了不同链段的平移和旋转运动特性以及链半径的相关函数。在后一种情况下使用两个接枝密度值。讨论了不同相关时间作为s和D的函数,以及刷子的互穿与旋转和平移运动之间的相互作用。弛豫函数和均方位移均根据拉伸指数进行了讨论,并详细介绍了所得“ Kohlrausch指数”γ的行为。

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