SCALING RELATIONS AND CORONAL DIMENSIONS IN AQUEOUS BLOCK POLYELECTROLYTE MICELLES

被引：187

作者：

ZHANG, LF ^{[1
]}

BARLOW, RJ ^{[1
]}

EISENBERG, A ^{[1
]}

机构：

[1] MCGILL UNIV,DEPT CHEM,MONTREAL,PQ H3A 2K6,CANADA

来源：

MACROMOLECULES | 1995年 / 28卷 / 18期

关键词：

D O I：

10.1021/ma00122a010

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polystyrene-b-poly(acrylic acid) block copolymers, prepared by sequential anionic polymerization, were found to associate to form spherical, water soluble micelle-like aggregates. The micelle core radii were measured by transmission electron microscopy(TEM). It was found that the core radii scaled as r(core) similar to (NBNA-0.15)-N-0.4 (where N-B and N-A are the lengths of the insoluble and soluble blocks, respectively), illustrating that the soluble block exerted a considerable influence on the colloidal structure of the micelles. The micellar solutions were also studied by dynamic light scattering (DLS), yielding values of the micelle hydrodynamic radius, r(h). These studies showed that, in the absence of salt, the ionized form of the poly(acrylic acid) chains in the coronal layer of the micelles had a highly extended conformation.

引用

页码：6055 / 6066

页数：12

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