Structure and dynamics in aqueous solutions of amphiphilic sodium maleate-containing alternating copolymers

E. Di Cola, N. Plucktaveesak, T. A. Waigh, R. H. Colby, J. S. Tan, W. Pyckhout-Hintzen, R. K. Heenan

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Abstract

The structure of aqueous solutions of sodium maleate copolymers with comonomers of variable hydrophobicity are examined using a combination of small-angle neutron scattering, small-angle X-ray scattering, and rheometry. Semidilute solutions of the copolymers made with mildly hydrophobic comonomers exhibit scattering and rheology that are typical of flexible polyelectrolytes, with a correlation length scaling with polymer concentration as c α with α = 1/2 and specific viscosity scaling as c 1/2/c 3/2 when unentangled/entangled. In contrast, copolymers with more than eight carbons in their hydrocarbon comonomer form micelles (globules) at low concentrations and molecular weights. For these more hydrophobic copolymers, the correlation length scales as c with α < 1/3 and the viscosity remains small until a relatively high concentration at which the globules start to overlap. Once these more hydrophobic copolymers overlap, the micelles open up and allow intermolecular associations that cause the viscosity to increase rapidly with concentration, typical of associating polymer solutions.

Original languageEnglish (US)
Pages (from-to)8457-8465
Number of pages9
JournalMacromolecules
Volume37
Issue number22
DOIs
StatePublished - Nov 2 2004

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All Science Journal Classification (ASJC) codes

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

Cite this

Di Cola, E., Plucktaveesak, N., Waigh, T. A., Colby, R. H., Tan, J. S., Pyckhout-Hintzen, W., & Heenan, R. K. (2004). Structure and dynamics in aqueous solutions of amphiphilic sodium maleate-containing alternating copolymers. Macromolecules, 37(22), 8457-8465. https://doi.org/10.1021/ma049260h