Association Behavior of a Triblock Copolymer of Oxyethylene (E) and Oxybutylene (B). A Study of B5E91B5 in Aqueous Solution
Static and dynamic light-scattering experiments were performed to study the association behavior of a BEB-type (B and E represent poly(oxybutylene) and poly(oxyethylene), respectively) triblock copolymer, B5E91B5, in aqueous solution from dilute to concentrated solution regions over a range of tempe...
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Published in | Langmuir Vol. 12; no. 21; pp. 5016 - 5021 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
16.10.1996
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Subjects | |
Online Access | Get full text |
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Summary: | Static and dynamic light-scattering experiments were performed to study the association behavior of a BEB-type (B and E represent poly(oxybutylene) and poly(oxyethylene), respectively) triblock copolymer, B5E91B5, in aqueous solution from dilute to concentrated solution regions over a range of temperature (15.5−45.0 °C). B5E91B5 is soluble in water at low temperatures. At 15.5 °C and concentrations below 3% (w/v), only unimers are present. At higher temperatures and in the dilute solution region, the degree of association and the aggregation number increase, while the critical micelle concentration decreases with increasing temperature. The existence of branched associated structures is suggested in the concentrated solution region, where interconnected micelles are in coexistence with small molecular associates (or premicelles) and the average size of these interconnected micelles appears to increase with increasing concentration. |
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Bibliography: | istex:127CC29C0A3172D9A5DDF3436B03D4C7E62A2133 Abstract published in Advance ACS Abstracts, September 1, 1996. ark:/67375/TPS-965S8TVW-P |
ISSN: | 0743-7463 1520-5827 |
DOI: | 10.1021/la9601768 |