Brownian Dynamics Simulations of Telechelic Polymers Transitioning between Hydrophobic Surfaces
Brownian Dynamics Simulations of Telechelic Polymers Transitioning between Hydrophobic Surfaces
复制标题
疏水表面间遥爪聚合物转变的布朗动力学模拟
DOI:
10.1021/acs.macromol.1c01540
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发表时间:
2021
期刊:
影响因子:
5.5
通讯作者:
Larson, Ronald G.
中科院分区:
文献类型:
--
作者:
Travitz, Alyssa;Larson, Ronald G.
We use Brownian dynamics (BD) simulations resolved at the level of a Kuhn step to calculate the rate at which a telechelic polymer with surface-adhering endcaps transitions from a bridge between two flat surfaces to a loop on a single surface. We then use self-consistent field theory to obtain the equilibrium ratio of bridges to loops and apply the principle of detailed balance to obtain the slower loop-to-bridge times from the faster bridge-to-loop times. The bridge-to-loop transition time has two scaling regimes: one where it is approximately equal to the time for a lone hydrophobic particle to desorb from a surface, and the other where it is dominated by the retraction time of the polymer; approximate formulas for both times are given. The results are important for interpreting the dynamics and rheology of latex coating fluids, in which colloidal particles are dynamically bridged by telechelic rheology-modifying polymers.
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