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Effect of solvent nature and spacer structure from zwitterionic moieties on the conformation of some poly(carboxybetaines) based on poly(n-vinylimidazole)

Ş. RACOVIŢĂ1,* , G. SAVIN2, V. NEAGU3, C. LUCA3

Affiliation

  1. Al. I. Cuza” University, Faculty of Chemistry, 11 Carol I Bd., 700506 Iasi, Romania
  2. “University of Fribourg”,Chemin du Musee 3, CH-1700 Fribourg, Switzerland
  3. “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania

Abstract

A light-scattering study on the solutions of two poly(carboxybetaines) based on poly(N-vinylimidazole) was performed. Distilled water, 0.5 M NaCl and methanol were used as solvents. From Zimm or Guinier plots molar masses (M w ), radius of gyration (RG) and second virial coefficients (A2) were determinated. The values of the above-mentioned parameters allowed an assignment of the conformation of two poly(carboxybetaines) dissolved in the above-mentioned solvents. Thus, in distilled water these polymers form aggregations by interchain associations, the addition of NaCl leads to the dissociation of the aggregations while methanol is the best thermodynamic solvent..

Keywords

Poly(carboxybetaines), Zwitterionic polymers, Light-scattering study.

Submitted at: April 2, 2007
Accepted at: Aug. 18, 2007

Citation

Ş. RACOVIŢĂ, G. SAVIN, V. NEAGU, C. LUCA, Effect of solvent nature and spacer structure from zwitterionic moieties on the conformation of some poly(carboxybetaines) based on poly(n-vinylimidazole), Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2623-2626 (2007)