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http://dx.doi.org/10.12925/jkocs.2010.27.4.22

Physical Characteristics of Hydrophobic Poly(sodium acrylate)s  

Ahn, Beom-Shu (Department of Chemistry, Dae Jin University)
Publication Information
Journal of the Korean Applied Science and Technology / v.27, no.4, 2010 , pp. 545-551 More about this Journal
Abstract
Hydrophobically monoendcapped poly(sodium acrylate)s formed hydrophobic microdomains in water. This was concluded on poly(sodium acrylate)s with a linear $C_{12}$-alkyl chain attached specifically at the end of the polymer. There was no well defined CMC (critical micelle concentration), but rather a gradual transition from a micelle free solution to a micelle solution. Steady state fluorescence spectroscopy indicates that the micro domains are rather hydrophobic. At pH 5 in the abscence of salt and at pH 9 in the prescence of 1 M sodium citrate the CAC (critical aggregation concentration) was in the range of 0.1 to 2.4 mM. However at pH 5 there was a linear increase in the transition concentration with a head-group size due to an increase in steric and electrostatic repulsions between polymer main chains. At pH 9 in the abscence of salt the transition concentration was in the range of 1 to 80 mM. For the larger polymers there was a effect which consisted of a concentration gradient of sodium counterion toward the hydrophobic domain. The effect was larger for the larger polymers because of the higher total sodium concentration and the less steep counterion concentration gradient.
Keywords
hydrophobically modified; micelle; fluorescence; poly sodium acrylate; critical aggregation concentration;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 H, Zhou, Y. Yazi, and I. Honma, Influence of Dissolved Additives on Cmc of Surfactants, Langmuir, 17, 1328 (2001).   DOI   ScienceOn
2 G. Fernandez and M. Moya, Surfactant Concentration Effect on the Distribution of the Reagents, Langmuir, 15, 4441 (1999).   DOI   ScienceOn
3 C. W. Macosko and X. D. Zhang, Roll of Silicone Surfactant in Flexible Polyurethane Form, J. Colloid and Interface Science, 215, 270 (1999).   DOI   ScienceOn
4 B. R. Yoo, W. U. Lee, and G. H. Lee, Synthesis of Silicone Surfactants by Hydrosilation, J. Applied Chemistry, 5, 183 (2001).
5 S. D. Seal and J. L. Lim, Preparation and Characterization of Encapulation by Core-Shell Latex, Elastomer, 38, 303 (2003).
6 N. J. Buurma, A.M. Heranz, and J. B. Engbert, Solution Effects for Some Ligand Substitution Reactions, J. Chem. Soc. Perkin 2, 113 (1999).
7 K. H. Park, Effect of Anionic Surfactants in Synthesizing Core-shell Polymer, J. Kor. Oil Chem. Soc., 26 ,66 (2009).   과학기술학회마을
8 B. K. Ku and S. W. Jung, Effects of Curing Conditions on the Chemical Composition of Positive Plates, J. Kor. Oil Chem. Soc., 23, 347 (2006).   과학기술학회마을
9 P. D. Battle and J. F. Vente, Equilibrium Structure of Micelles, Phys. Rev. B, 54, 15967 (1996).   DOI   ScienceOn
10 H. S. Park, S. Y. Hong, and H. S. Hahm, Synthesis of Modified SIlane Resins and their Physical Properties, J. Kor. Oil Chem. Soc., 24, 10 (2007).   과학기술학회마을
11 G. A. Peterson and D. K. Malik, and W. G. Wilson, Enthalpies and Heat Capacities of Micellization of Some Surfactants, J. Chem. Phys., 109, 10570 (1998).   DOI   ScienceOn
12 X. G. Feng and H. Wang, Pressure Induced Surfactant Association, J. Phys. Chem., 97, 4484 (1993).   DOI   ScienceOn
13 T. S. Ahmad and L. A. Elsaed, Acid Catalyzed Hydrolysis in Aqueous Cationic Micelles, Surf. Sci., 380, 302 (1997).   DOI   ScienceOn
14 A. Sohri and H. Burrows, Characteristics of the Environment Pyrene Sense, J. Chem. Soc. Faraday Trans, 78, 2033 (1982).   DOI
15 N. J. Turro and D. A. Tomalia, Micellar Charge Effects on Spontaneous Nucleophilic Substitution, J. Phys. Chem. B, 101, 158 (1997).   DOI   ScienceOn
16 J. Kevelam, S. Martinuci, and A. Visser, Synthesis of poly sodium acrylate by radical polymerization, Langmuir, 15, 4989 (1999).   DOI   ScienceOn