TOPOLOGICAL INFLUENCES ON POLYMER ADSORPTION AND DESORPTION DYNAMICS

被引：60

作者：

JOHNSON, HE ^{[1
]}

DOUGLAS, JF ^{[1
]}

GRANICK, S ^{[1
]}

机构：

[1] NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.70.3267

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The desorption of polymer chains through an overlayer of strongly adsorbed chains was studied to determine the influence of topological constraints on the polymer desorption process. The desorption time of linear chains fits a power law, M(a), where M is molecular weight and a = 2.3 +/- 0.2. A comparison of linear and star-branched chains shows that desorption of star-branched chains was greatly suppressed. These findings are reminiscent of entanglement effects in bulk systems. They suggest a unifying perspective from which to analyze polymer mobility at surfaces.

引用

页码：3267 / 3270

页数：4

共 28 条

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