FORCES BETWEEN END-ADSORBED TRIBLOCK COPOLYMER CHAINS AND A BARE MICA SURFACE IN A GOOD SOLVENT

被引：38

作者：

DAI, L ^{[1
]}

TOPRAKCIOGLU, C ^{[1
]}

机构：

[1] INST FOOD RES, NORWICH NR4 7UA, NORFOLK, ENGLAND

来源：

EUROPHYSICS LETTERS | 1991年 / 16卷 / 04期

关键词：

D O I：

10.1209/0295-5075/16/4/003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the bridging effects of terminally adsorbed chains by directly measuring the forces between a single adsorbed layer of poly(ethylene oxide)-polystyrene-poly(ethylene oxide) (PEO-PS-PEO) triblock copolymer and a bare mica surface in a good solvent (toluene). We find, as the bare mica surface approaches, clearly detectable long-range attractive forces followed by an attractive minimum and monotonically increasing repulsion at smaller separations. Significant changes in the force-distance profiles with compression-decompression cycles are also observed, which strongly indicate rearrangement of the adsorbed macromolecular chains between the surfaces.

引用

页码：331 / 335

页数：5

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