Semiflexible polymers grafted to a solid planar substrate: Changing the structure from polymer brush to "polymer bristle"
Semiflexible polymers grafted to a solid planar substrate: Changing the structure from polymer brush to "polymer bristle"
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DOI：
10.1063/1.4712138
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发表时间：
2012-05-21
影响因子：
4.4
通讯作者：
Binder, Kurt
中科院分区：
文献类型：
--
作者：
Milchev, A.;Binder, Kurt
蒙特卡罗模拟的粗粒度模型的聚合物刷具有不同程度的刚度的聚合物。线性链和环状聚合物接枝到一个平坦的无结构的非吸附基板表面被认为是。应用良好的溶剂条件下，它表明，随着聚合物刚度的增长，刷高度显着增加。环状聚合物（链长N-R = 64）的情况下的单体密度分布非常类似于柔性聚合物的情况下的相应线性链（N-L = 32，接枝密度大两倍）的情况，而随着刚度的增加出现轻微的差异。证据表明，在刷链动力学显着放缓，增加刚度。极短刚性环（N-R
Monte Carlo simulations are presented for a coarse-grained model of polymer brushes with polymers having a varying degree of stiffness. Both linear chains and ring polymers grafted to a flat structureless non-adsorbing substrate surface are considered. Applying good solvent conditions, it is shown that with growing polymer stiffness the brush height increases significantly. The monomer density profiles for the case of ring polymers (chain length N-R = 64) are very similar to the case of corresponding linear chains (N-L = 32, grafting density larger by a factor of two) in the case of flexible polymers, while slight differences appear with increasing stiffness. Evidence is obtained that the chain dynamics in brushes is slowed down dramatically with increasing stiffness. Very short stiff rings (N-R