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A calorimetric study of the enthalpy of micelle formation by a polystyrene-b-polyisoprene block copolymer in n-hexadecane

✍ Scribed by C. Price; E.K.M. Chan; G. Pilcher; R.B. Stubbersfield

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 182 KB
Volume: 21
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(85)90095-3

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✦ Synopsis

Abstraet--A calorimetric study was made of micelle formation by a polystyrene-b-polyisoprene block copolymer in n-hexadecane which is a selectively bad solvent for polystyrene. A value of -44.0 + 4.0 kJ mol-~ was obtained for the enthalpy of micellisation, in good agreement with a value of -40.7 +2.2kJmol -~ determined for this system in an earlier study from measurements of the temperature dependence of the critical micelle concentration. The agreement between the results supports the use of a simple mass-action model in accounting for the thermodynamics of micellisation of block copolymers in organic solvents.

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