The rheology of suspensions of vinylon fibers in polymer liquids. I. Suspensions in silicone oil
The rheology of suspensions of vinylon fibers in polymer liquids. I. Suspensions in silicone oil
复制标题
聚合物液体中维尼纶纤维悬浮液的流变学。
DOI：
10.1007/bf01547670
复制
发表时间：
1981
期刊：
影响因子：
2.3
通讯作者：
T. Kataoka
中科院分区：
文献类型：
--
作者：
T. Kitano;T. Kataoka
通过锥板式流变仪测量了维尼纶纤维在硅油中的悬浮液的稳定剪切流动性能。使用的三种维尼纶纤维没有长度分布并且比玻璃纤维等更柔韧。纤维的含量范围为0至7重量%。讨论了剪切粘度、第一法向应力差、屈服应力和相对粘度。剪切粘度和相对粘度随着纤维浓度和长径比的增加而增加，并且取决于剪切速率。研究了齐格尔粘度方程对于纤维悬浮液的适用性。第一法向应力差随纤维浓度、长径比和剪切速率的增加而增加，其相对增加量远大于剪切应力和粘度，具体取决于特征时间的性质。与球形颗粒或粉末的悬浮液相比，即使在低浓度下，大长径比纤维悬浮液的屈服应力也可以通过卡森图确定。纤维的柔韧性对纤维悬浮液流变性能的影响不容忽视。
The steady shear flow properties of suspensions of vinylon fibers in silicone oil were measured by means of a cone-plate type rheometer. Three kinds of vinylon fibers used had no distributions of length and were more flexible than glass fibers and the like. The content of the fibers ranged from 0 to 7 wt.%. Shear viscosity, the first normal-stress difference, yield stress, and relative viscosity were discussed. Shear viscosity and relative viscosity increased with the fiber concentration and the aspect ratio, and depended upon the shear rate. The applicability of Ziegel's equation of viscosity for fiber suspensions was investigated. The first normal-stress difference increased with the fiber concentration, aspect ratio, and shear rate and its relative increase was much larger than for shear stress and viscosity depending on the properties of the characteristic time,The yield stress could be determined by Casson plots for large aspect ratio fiber suspensions even in low concentration comparing with the suspensions of spherical particles or powder. The influence of the flexibility of the fibers for the rheological properties of the fiber suspensions can not be ignored.