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首页> 外文期刊>Chemical Physics Letters >The role of solvent quality, inhomogeneous polymer brush composition, grafting density and number of free chains on the viscosity, friction between surfaces, and their scaling laws
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The role of solvent quality, inhomogeneous polymer brush composition, grafting density and number of free chains on the viscosity, friction between surfaces, and their scaling laws

机译:溶剂质量,不均匀聚合物刷组合物,接枝密度和自由链数量的作用,表面之间的摩擦和缩放法

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摘要

Brushes made up of mixtures of polymers are modeled using mesoscale simulations under shear and the viscosity and the friction coefficient are obtained as functions of the chains' grafting density, brush composition, free chain concentration, and solvent quality. We find that brushes made up of mixtures of polymers can reduce to a greater extent the friction coefficient in comparison to a mono-chain brush and that both the viscosity and the friction coefficient obey scaling laws that depend only on solvent quality. These results shed light on microscopic mechanisms that affect viscosity and friction in polymeric brushes, which are findings of interest for research on nanotribology.
机译:由聚合物混合物组成的刷子在剪切下使用Messcale模拟进行建模,并且获得粘度和摩擦系数作为链接的嫁接密度,刷子组合物,游离链浓度和溶剂质的函数获得。 我们发现由聚合物的混合物组成的刷子可以在更大程度上降低与单链刷相比的摩擦系数,并且粘度和摩擦系数遵循缩放法的缩放法,这些规则依赖于溶剂质量。 这些结果揭示了影响聚合物刷子中粘度和摩擦的微观机制,这是对纳米纤维学研究的感兴趣的结果。

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