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Issue 12, 2003
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Enthalpy of micellisation of a diblock copoly(oxyethylene/oxypropylene) by isothermal titration calorimetry. Comparison with the van't Hoff value

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Abstract

Block copolymer P94E316 (P = oxypropylene, E = oxyethylene, and the subscripts denote number-average block lengths) has been studied by isothermal titration calorimetry to determine critical micelle concentrations (c.m.c.) and enthalpies of micellisation at temperatures in the range 20–35 °C. Comparison with values of the c.m.c. determined previously by other methods shows good agreement. Comparison of the enthalpies of micellisation with standard values determined using the van′t Hoff equation indicates a marked difference in values derived from the two methods. We speculate that the effect is caused by the P-block-length distribution in the copolymer.

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Publication details

The article was received on 20 Mar 2003, accepted on 01 May 2003 and first published on 20 May 2003


Article type: Paper
DOI: 10.1039/B303108J
Citation: Phys. Chem. Chem. Phys., 2003,5, 2625-2627
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    Enthalpy of micellisation of a diblock copoly(oxyethylene/oxypropylene) by isothermal titration calorimetry. Comparison with the van't Hoff value

    P. Taboada, V. Mosquera, D. Attwood, Z. Yang and C. Booth, Phys. Chem. Chem. Phys., 2003, 5, 2625
    DOI: 10.1039/B303108J

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