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Temperature Dependence of the Self-Assembled Styrene Based Random Ionomers in Aqueous Solution

Published online by Cambridge University Press:  10 February 2011

Sung-Hwa Oh ,
Ju-Myung Song ,
Joon-Seop Kim ,
Hyang-Rim Oh  and
Jeong-A Yu
Sung-Hwa Oh
Affiliation:
Department of Polymer Science & Engineering, Chosun University, Gwangju 501-759, Korea
Ju-Myung Song
Affiliation:
Department of Polymer Science & Engineering, Chosun University, Gwangju 501-759, Korea
Joon-Seop Kim
Affiliation:
Department of Polymer Science & Engineering, Chosun University, Gwangju 501-759, Korea
Hyang-Rim Oh
Affiliation:
Department of Science Education, Chosun University, Gwangju 501-759, Korea
Jeong-A Yu
Affiliation:
Department of Science Education, Chosun University, Gwangju 501-759, Korea
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Abstract

Solution behaviors of poly(styrene-co-sodium methacrylate) were studied by fluorescence spectroscopic methods using pyrene as a probe. The mol% of methacrylate was in the range 3.6–9.4. Water and N,N-dimethylforamide(DMF) mixture was used as a solvent (DMF/water = 0.2 mol %). The critical micelle (or aggregation) concentrations of ionomers and the partition coefficients of pyrene were obtained the temperature range 10–80°C. At room temperature, the values of CMCs (or CACs) were in the range 4.7 ×10-6 5.3 ×10-6 g/mL and we could not find any notable effect of the content of ionic repeat units within the experimental errors. Unlike CMCs, as the ion content increased, partitioning of pyrene between the hydrophobic aggregates and an aqueous media decreased from 1.5 ×105 to 9.4 ×104. As the temperature increased from 10 to 80 °C, the values of CMCs increased less than one order of magnitude. While, the partition coefficients of pyrene decreased one order of magnitude and the effect of the ion content became negligible.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 775: Symposium P – Self-Assembled Nanostructured Materials , 2003 , P6.27
Copyright
Copyright © Materials Research Society 2003

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