Abstract
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 language | English (US) |
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Pages (from-to) | 613-614 |
Number of pages | 2 |
Journal | American Chemical Society, Polymer Preprints, Division of Polymer Chemistry |
Volume | 32 |
Issue number | 1 |
State | Published - Apr 1991 |
Event | Papers presented at the Atlanta Meeting 1991 of the ACS, Division of Polymer Chemistry - Atlanta, GA, USA Duration: Apr 14 1991 → Apr 19 1991 |
All Science Journal Classification (ASJC) codes
- Polymers and Plastics