The viscous flow behavior of a 12.5 vol% hydrophobic fumed silica (Aerosil^® R816) suspension in polypropylene glycol of low molecular weight (PPG400) was studied in a stress-controlled rheometer. The steady flow curve showed shear thickening between two shear thinning regions. Time-dependent viscosity response provoked by step changes in shear stresses corresponding to the shear-thickening region apparently agrees with thixotropic behavior just after the very initial stages are surpassed. Almost instantaneous jamming can justify misinterpretation of the results.

中文翻译：

---

疏水性气相二氧化硅悬浮液的随时间变化的粘性流动行为

12.5体积的粘性流动行为％疏水气相法二氧化硅（的Aerosil ^®在低分子量（PPG400）的聚丙二醇R816）的悬浮液中的应力控制流变仪研究。稳定流动曲线显示出两个剪切稀化区域之间的剪切稠化。刚超过初始阶段后，由与剪切增稠区域相对应的剪切应力的阶跃变化引起的随时间变化的粘度响应显然与触变行为相符。几乎瞬时的干扰可以证明对结果的误解。