Polymer brush under strong shear

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题名:	Polymer brush under strong shear
作者:	Lai,PY;Lai,CY
贡献者:	物理研究所
关键词:	MONTE-CARLO;HYDRODYNAMIC INTERACTIONS;GRAFTED POLYMERS;LAYERS;FLOW;SURFACES;FORCES;CHAIN
日期:	1996
上传时间:	2010-07-08 14:07:38 (UTC+8)
出版者:	中央大學
摘要:	End-grafted polymer brush exposed to strong shear solvent flow is studied. Under strong enough shear flow, the shear force is nonlinear with the blob size depending on the shear force and not on the monomer volume fraction phi. We derive the crossover force scale separating the weak and strong shear regime. The velocity profile of the flow, v(z), inside and above the brush is calculated analytically by treating the flow as in a porous medium and solving the Brinkman equation. The solution of the velocity profile is then combined with nonequilibrium Monte Carlo simulation data, which allow a self-consistent determination of the chain end-to-end length and the incline angle of the chain. We derive the scaling form for the chain positions x(n) for the nth monomer and verified by our simulation data. We further obtain analytical expression for x(n) in terms of the effective viscosity of the model.
關聯:	PHYSICAL REVIEW E
显示于类别:	[物理研究所] 期刊論文

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