Rheology of semi-dilute ionomer solutions

Richard J. Ketz, William W. Graessley, Robert K. Prud'homme

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9 Scopus citations


The rheological properties of semi-dilute, shear-thickening solutions of a sulphonated polystyrene-4-vinylpyridine(2.1%) (SPS-4VP) copolymer (1.8% sulphonation; counterions : Na, Ni, Cd, Zn) in 1-methylnaphthalene were investigated. Measurements, made using a Rheometrics' System IV, Stress Rheometer, and Fluids Spectrometer II, included transient and steady shear, stress relaxation, recoverable strain, and dynamic oscillatory response. These ionomers were very effective viscosifiers; the zero-shear viscosity scaling with concentration to a power of 4 to 7, dependent on counterion. Shear-thickening was observed at concentrations above the chain overlap concentration, and occurred over a critical shear stress region relatively independent of counterion and concentration.

Original languageEnglish (US)
Pages (from-to)613-614
Number of pages2
JournalAmerican Chemical Society, Polymer Preprints, Division of Polymer Chemistry
Issue number1
StatePublished - Apr 1991
EventPapers presented at the Atlanta Meeting 1991 of the ACS, Division of Polymer Chemistry - Atlanta, GA, USA
Duration: Apr 14 1991Apr 19 1991

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics


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