Temperature-induced growth of wormlike copolymer micelles

被引：48

作者：

Duval, M ^{[1
]}

Waton, G ^{[1
]}

Schosseler, F ^{[1
]}

机构：

[1] ULP, Inst Charles Sadron, CNRS, UPR 22, F-67083 Strasbourg, France

来源：

LANGMUIR | 2005年 / 21卷 / 11期

关键词：

D O I：

10.1021/la050177c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We study the temperature-induced growth of polymer micelles based on Pluronic P84 in brine (2 M NaCl) using small-angle neutron scattering, static and dynamic light scattering, and viscometry as a function of temperature and polymer concentration. Spherical micelles below 30 degrees C are shown to grow between about 30 and 40 degrees C into wormlike micelles long enough to enter the semidilute regime for polymer volume fraction larger than 0.005. The entanglements in this regime are responsible for a huge increase in the viscosity. Above about 41 degrees C, the micellar aggregates become denser as the cloud point is approached and the viscosity drops.

引用

页码：4904 / 4911

页数：8

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