Scattering and viscosimetric behaviors of four- and six-arm star polyelectrolyte solutions

D. Moinard, R. Borsali*, D. Taton, Y. Gnanou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


This paper discusses the scattering and viscosity results of four- and six-arm sodium, cesium, and rubidium polyacrylate (PANa, PACs, PARb) star polyelectrolyte solutions in comparison with their equivalent linear polyelectrolyte chains. The polyelectrolyte effect is highlighted in these systems, and an estimate of the persistence length is deduced from static light scattering and X-ray scattering. Static and dynamic light scattering studies permitted to determine their mass average molar mass 〈Mw〉, their radius of gyration 〈Rg〉, their second virial coefficient A2, their hydrodynamic radius AH, and their persistence length LP. The polyelectrolyte "abnormal" behavior was observed in the variation of the reduced viscosity η red as a function of the polyelectrolyte concentration CP on linear and star systems (existence of a maximum in ηred vs CP). Additionally to the specific behavior brought by the star architecture, the results also show an important effect due to the type of counterions and the charge parameter on the scattering and the viscometric properties. A systematic comparison between linear and star polyelectrolytes having similar molar mass, counterions, and charge parameter is presented.

Original languageEnglish (US)
Pages (from-to)7105-7120
Number of pages16
Issue number16
StatePublished - Aug 9 2005

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry


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