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.
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收藏
页码：10028 / 10031
页数：4
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