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
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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
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通讯作者:
L. Léger
L. Léger
中科院分区:
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文献类型:
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作者:
E. Durliat;H. Hervet;L. Léger

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我们已经研究了剪切流动的聚二甲基硅氧烷(PDMS)熔体上的PDMS刷的良好控制的密度。随着剪切速率的增加,我们表明存在从弱滑动状态到强滑动状态的滑动转变,其中速度剖面的外推长度b为常数b 0,其中速度剖面的外推长度B在转变时保持其值。讨论了接枝密度对b0和b2的影响。我们将我们的结果与最近的微观模型进行了比较。
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.