Thermodynamics of a Partially Swollen Polymer Brush
Thermodynamics of a Partially Swollen Polymer Brush
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部分膨胀聚合物刷的热力学
DOI：
10.1021/ma011197y
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Hui Xu
中科院分区：
文献类型：
--
作者：
W. Goedel;Peter Eibeck;Hui Xu
初始无溶剂的锚定聚合物链单层随着溶剂量的逐渐增加而膨胀，对其热力学，尤其是侧压力有显著影响。随着溶剂量的增加，侧压力最初与锚定链的平均体积分数的平方成反比增加，但最终趋于稳定，达到一个与组成无关的极限值。随着锚固链面积的增加，侧压力的极限值降低，而达到极限值所需的溶剂量增加。观测到的效果与基于解析平均场理论的预测相吻合。
Swelling initially solvent-free monolayers of anchored polymer chains with a gradually increasing amount of solvent significantly influences their thermodynamics, especially the lateral pressure. Upon increasing the amount of solvent, the lateral pressure initially increases inversely proportional to the square of the average volume fraction of the anchored chains but finally levels off to a limiting value independent of the composition. With increasing area per anchored chain the limiting value of the lateral pressure decreases, while the amount of solvent needed to reach the limiting value increases. The observed effects are in good agreement with predictions based on analytical mean field theory.