Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Physical Characteristics of Hydrophobic Poly(sodium acrylate)s

소수성 성질을 갖는 Poly(sodium acrylate)s의 물리적 특성

  • 안범수 (대진대학교 자연과학대학 화학과)
  • Received : 2010.10.25
  • Accepted : 2010.12.10
  • Published : 2010.12.31
Download PDF
⟨ Previous Next ⟩

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

References

  1. C. W. Macosko and X. D. Zhang, Roll of Silicone Surfactant in Flexible Polyurethane Form, J. Colloid and Interface Science, 215, 270 (1999). https://doi.org/10.1006/jcis.1999.6233
  2. B. R. Yoo, W. U. Lee, and G. H. Lee, Synthesis of Silicone Surfactants by Hydrosilation, J. Applied Chemistry, 5, 183 (2001).
  3. S. D. Seal and J. L. Lim, Preparation and Characterization of Encapulation by Core-Shell Latex, Elastomer, 38, 303 (2003).
  4. G. Fernandez and M. Moya, Surfactant Concentration Effect on the Distribution of the Reagents, Langmuir, 15, 4441 (1999). https://doi.org/10.1021/la981586u
  5. N. J. Buurma, A.M. Heranz, and J. B. Engbert, Solution Effects for Some Ligand Substitution Reactions, J. Chem. Soc. Perkin 2, 113 (1999).
  6. 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).
  7. P. D. Battle and J. F. Vente, Equilibrium Structure of Micelles, Phys. Rev. B, 54, 15967 (1996). https://doi.org/10.1103/PhysRevB.54.15967
  8. 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).
  9. K. H. Park, Effect of Anionic Surfactants in Synthesizing Core-shell Polymer, J. Kor. Oil Chem. Soc., 26 ,66 (2009).
  10. 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). https://doi.org/10.1063/1.477794
  11. X. G. Feng and H. Wang, Pressure Induced Surfactant Association, J. Phys. Chem., 97, 4484 (1993). https://doi.org/10.1021/j100119a037
  12. T. S. Ahmad and L. A. Elsaed, Acid Catalyzed Hydrolysis in Aqueous Cationic Micelles, Surf. Sci., 380, 302 (1997). https://doi.org/10.1016/S0039-6028(97)05180-7
  13. H, Zhou, Y. Yazi, and I. Honma, Influence of Dissolved Additives on Cmc of Surfactants, Langmuir, 17, 1328 (2001). https://doi.org/10.1021/la001417l
  14. N. J. Turro and D. A. Tomalia, Micellar Charge Effects on Spontaneous Nucleophilic Substitution, J. Phys. Chem. B, 101, 158 (1997). https://doi.org/10.1021/jp962857h
  15. J. Kevelam, S. Martinuci, and A. Visser, Synthesis of poly sodium acrylate by radical polymerization, Langmuir, 15, 4989 (1999). https://doi.org/10.1021/la981636v
  16. A. Sohri and H. Burrows, Characteristics of the Environment Pyrene Sense, J. Chem. Soc. Faraday Trans, 78, 2033 (1982). https://doi.org/10.1039/f19827802033