Gelation and micellization of aqueous solutions of a triblock copolymer

The temperature-dependent properties of aqueous solutions of a triblock copolymer of ethylene oxide (EO) and propylene oxide (PO), with composition EO sub(21)PO sub(47)EO sub(21), have been measured by use of viscoelastic techniques and scanning calorimetry. Unimer-micelle equilibrium exists at low...

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Bibliographic Details
Published inJournal of non-crystalline solids Vol. 172-7; no. pt 2; pp. 972 - 977
Main Authors Jorgensen, E B, Jensen, J H, Hvidt, S
Format Journal Article
LanguageEnglish
Published 01.01.1994
Subjects
Composition effects
Gelation
Micelles
Molecular structure
Order disorder transitions
Phase equilibria
Polyethylenes
Polypropylenes
Solutions
Strain
Thermal effects
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Summary:The temperature-dependent properties of aqueous solutions of a triblock copolymer of ethylene oxide (EO) and propylene oxide (PO), with composition EO sub(21)PO sub(47)EO sub(21), have been measured by use of viscoelastic techniques and scanning calorimetry. Unimer-micelle equilibrium exists at low temperatures and two sol to gel transitions are observed with increasing temperatures. The elastic moduli of the gel states are attributed to increasing exposure of hydrophobic groups to water with strain.
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ISSN:0022-3093