CONFORMATIONS OF BLOCK COPOLYMERS TERMINALLY ADSORBED AT THE SOLID-LIQUID INTERFACE

被引：1

作者：

TOPRAKCIOGLU, C ^{[1
]}

DAI, L ^{[1
]}

ANSARIFAR, MA ^{[1
]}

机构：

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

来源：

JOURNAL OF MACROMOLECULAR SCIENCE-PURE AND APPLIED CHEMISTRY | 1992年 / 29卷

关键词：

D O I：

10.1080/10101329208054575

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The conformations of end-adsorbed diblock and triblock copolymers of polystyrene (PS) and polyethylene oxide (PEO) adsorbed onto mica from toluene have been studied by the surface force method. The PS-PEO diblock copolymer system forms a semi-dilute brush with the non-adsorbing PS chains adopting an extended configuration away from the surface. Neutron reflectometry indicates that the volume fraction profile of such a system has a broadly parabolic shape, in agreement with theory. In contrast to PS-PEO diblock copolymers which adsorb only in a "tail" conformation, PEO-PS-PEO triblock chains form "loops" as well as "tails" on the mica substrate. Attractive forces are observed when an adsorbed layer of PEO-PS-PEO triblock copolymer is allowed to interact with a bare mica wall, due to the formation of polymer bridges between the two opposing surfaces.

引用

页码：139 / 146

页数：8

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