Large-scale structure in gels of attractive block copolymer micelles

被引：10

作者：

Crichton, MA ^{[1
]}

Bhatia, SR ^{[1
]}

机构：

[1] Univ Massachusetts, Dept Chem Engn, Amherst, MA 01003 USA

来源：

LANGMUIR | 2005年 / 21卷 / 22期

关键词：

D O I：

10.1021/la0508487

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have used ultra-small-angle scattering (USANS) and fluorescence microscopy to demonstrate the existence of a nonfractal large-scale structure in attractive micellar gels of poly(styrene)-poly(acrylic acid) block copolymers, which have some characteristics of attractive colloidal glasses. The nature of the large-scale structure appears to depend systematically on the strength of attraction. Our systems display scattering that follows I similar to q(x) in the low q regime, with x varying from approximately -3 to -4 as the strength of attraction is decreased. This scattering behavior appears to be the result of surface scattering from large, highly polydisperse aggregates with rough interfaces.

引用

页码：10028 / 10031

页数：4

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