Density functional study of wetting by polymers. I. Effects of polymer length and surface potential

被引:6
作者
Forsman, J [1 ]
Woodward, CE [1 ]
Freasier, BC [1 ]
机构
[1] Univ New S Wales, Australian Def Force Acad, Univ Coll, Sch Chem, Canberra, ACT 2600, Australia
关键词
D O I
10.1063/1.1451053
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Wetting by a polymer fluid at an attractive surface is investigated using density functional theory. It is shown that the qualitative behavior of the wetting temperature, T-w, as a function of the polymer length, depends on the strength of the surface potential. Defining T-c as the bulk critical temperature, we find that the normalized wetting temperature, T-w/T-c, shows nonmonotonic dependence on polymer length. For weak surface potentials, T-w/T-c increases with polymer length and, in some cases, wetting seems to be suppressed. It is conjectured that this may occur via an encroaching drying transition. (C) 2002 American Institute of Physics.
引用
收藏
页码:4715 / 4722
页数:8
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