Effect of Ureas on the Conformational Properties of Poly(ethylene oxide) in Aqueous Solutions by Viscometry

수용액에서 점도계법에 의한 폴리에틸렌 옥사이드의 구조성질에 대한 요소 용질들의 효과

  • Ra, Seung Chang (Department of Chemistry, Kangnung National University) ;
  • Yoon, Byoung Jip (Department of Chemistry, Kangnung National University) ;
  • Jeon, Sang Il (Department of Chemistry, Kangnung National University)
  • 나승창 (강릉대학교 자연과학대학 화학과) ;
  • 윤병집 (강릉대학교 자연과학대학 화학과) ;
  • 전상일 (강릉대학교 자연과학대학 화학과)
  • Published : 19950800

Abstract

The conformational properties of poly(ethylene oxide) (PEO) in aqueous solutions are studied by viscometry with respect to the water structure perturbing capabilities of a series of urea solutes at $16^{\circ}C$, and experiments for the effect of amounts of urea and methylurea on PEO at 16 and $25^{\circ}C$ are also performed. The results show that the chain expansion, by ureas, of PEO of $1.0{\times}10^5$ molecular weight at $16^{\circ}C$ is similar to that of PEO of $8.0{\times}10^3$ molecular weight at $25^{\circ}C$ with respect to the water structure perturbation. Urea and methylurea make the PEO chain expand by the perturbation of water structure around PEO and by the hydrophobic interaction between methylurea and PEO, respectively. PEO of $1.0{\times}10^5$ molecular weight has hydrophobic sites on it, which are roughly classified into two parts; one is the inner hydrophobic groups which can interact between themselves (intramolecular hydrophobic interaction) and prevails at $16^{\circ}C$, and the other is the outer, exposed hydrophobic groups which can interact with the added hydrophobic solute (intermolecular hydrophobic interaction) and prevails at $25^{\circ}C.$

Keywords

References

  1. Thesis, Univ. of Utah Interactions of PEO-Containing Polymeric Surfactants with Hydrophobic Surfaces Lee, J. H.
  2. J. Polym. Sci., Polym. Phys. v.8 Koenig, J. L.;Angood, A. C.
  3. J. Am. Chem. Soc. v.90 Hammes, G. G.;Roberts, P. B.
  4. J. Phys. Chem. v.98 Bieze, T. W. N.;Barnes, A. C.;Huige, C. J. M.;Enderby, J. E.;Leyte, J. C.
  5. Macromolecules v.26 Malmsten, M.;Linse, P.;Zhang, K.-W.
  6. J. Chem. Phys. v.48 Frank, H. S.;Franks, F.
  7. Water-Soluble Synthetic Polymers: Properties and Behavior v.1;2 Molyneux, P.
  8. Macromolecules v.16 Polik, W. F.;Burchard, W.
  9. J. Polym. Sci. Part A, Polym. Chem. v.27 Jeon, S. I.;Jhon, M. S.
  10. J. Colloid Interface Sci. v.142 Jeon, S. I.;Andrade, J. D.
  11. J. Chem. Soc. Faraday Trans. 1 v.77 Kjellander, R.;Florin, E.
  12. J. Phys. Chem. v.98 Barnes, A. C.;Bieze, T. W. N.;Enderby, J. E.;Leyte, J. C.
  13. J. Phys. Chem. v.80 James, D. W.;Armishaw, R. F.;Frost, R. L.
  14. J. Am. Chem. Soc. v.99 Bonner, O. D.;Bednarek, J. M.;Arisman, P. K.
  15. Macromolecules v.2 Liu, K. J.;Parsons, J. L.
  16. Physical Biochemistry Freifelder, D.
  17. J. Am. Chem. Soc. v.89 Hammes, G. G.;Schimmel, P. R.
  18. Principles of Biochemistry Lehninger, A. L.
  19. J. Am. Chem. Soc. v.94 Finer, E. G.;Franks, F.;Tait, M. J.
  20. Macromolecules v.24 Devanand, K.;Stelser, J. C.
  21. Water A Comprehensive Treatise v.4 Franks, F.
  22. J. Phys. Chem. v.77 Herskovits, T. T.;Kelly, T. M.
  23. Bull. Korean Chem. Soc. v.15 Jeon, S. I.;Choi, H. -K.;Ra, S. C.;Yoon, B. J.
  24. Z. Phys. Chem. v.258 Kummel, R.;Schaller, I.
  25. J. Phys. Chem. v.95 Bjorling, M.;Karlstrom, G.;Linse, P.
  26. Surface and Interfacial Aspects of Biomedical Polymers Andrade, J. D.