Study on the rheological measurement method of hydrophobic associating polymer solution I: steadystate shear viscosity

In order to obtain accurate and repeatable steadystate shear viscosity of hydrophobic associating polymer solution, the influence of solution structure properties on rheological measurement result were analyzed firstly, then the relationship between dynamic equilibrium of destroying/rebuilding reversible process for hydrophobic associating water-soluble polymer (HAWSP) solution and the measurement result of steadystate shear viscosity has been discussed. The effect of pre-shearing stage on steady shear viscosity carried out on both RS600 and Brookfield DV-Ⅲ rheometers respectively. The results showed that well repeatable steadystate shear viscosity testing results could reached by rationally optimizing pre-shearing stage on the both rheometers, and test errors of steady shear viscosity were smaller than 3%.