懸濁製剤の研究 (第4報)

粘性について その2

抄録

Measurement of viscosity was carried out in a large and wide range of rate of shear on a suspension of five kinds of granules, including the four mentioned in the preceding paper and barium sulfate. All were found to be a Bingham body and showed a simple plastic flow as long as the amount of the granules added was small but exhibited hysteresis loop in the viscosity curve as the amount of granules increased, and the thixotropic coefficient, M, increased with the increase of yield value and plastic viscosity. In the present series of experiments, barium sulfate alone showed exceptional characteristics and both the yield value and plastic viscosity tended to decrease when the amount added was small.