Feb 12, 2013 · The second group of tests was conducted to study the effect of high temperature on polymer viscosity. The test temperature was controlled at 50, 70 and 90 °C. The shear rate was controlled at 1, 10, 100 and 1,000 s −1. The tested polymer concentration was 1,500 ppm. All viscosity measurements were conducted by a torque-type viscometer.
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