Effect of ethanol on the rheological properties of water-rich gels of diblock copolymer E43B11

被引：7
作者：
Kelarakis, A
Havredaki, V
Booth, C
机构：
[1] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England
[2] Natl & Kapodistrian Univ Athens, Dept Chem, Chem Phys Lab, Athens 15771, Greece
[3] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England
来源：
MACROMOLECULAR CHEMISTRY AND PHYSICS | 2004年 / 205卷 / 12期
关键词：
aqueous ethanol; block copolymers; micelles; phase diagrams; rheology;
D O I：
10.1002/macp.200400097
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 effect of added ethanol on the rheological behaviour of aqueous solutions of diblock copolymer E43B11 (E = oxyethylene unit, B = oxybutylene unit) has been investigated. Thermally reversible sol-gel transitions were observed for concentrated solutions of the copolymer in solutions containing 0-30 wt.-% ethanol. Storage (G') and loss (G") moduli and yield stress (sigma(y)) were used to define hard and soft gel phases. The introduction of 10 wt.-% ethanol did not alter the phase behaviour greatly, whereas higher ethanol concentrations had a large effect, which differed in kind from that reported for triblock copolymers of ethylene oxide and propylene oxide, type EPE.
引用
收藏
页码：1594 / 1601
页数：8
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