Influence of grafting density on wall slip of a polymer melt on a polymer brush
Influence of grafting density on wall slip of a polymer melt on a polymer brush
复制标题
接枝密度对聚合物刷上聚合物熔体壁滑移的影响
DOI:
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发表时间:
1997
期刊:
影响因子:
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通讯作者:
L. Léger
中科院分区:
文献类型:
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作者:
E. Durliat;H. Hervet;L. Léger
We have investigated the shear flow of a polydimethylsiloxane (PDMS) melt on a PDMS brush of well-controlled density. As the shear rate, , is increased, we show the existence of a slip transition from a weak slip regime, where the extrapolation length of the velocity profile, b, is a constant b0, to a strong one, where sticks to its value at the transition . We discuss the influence of the grafting density Σ on b0 and . We compare our results with a recent microscopic model.