Polymer shear stability
Polymer shear stability
复制标题
聚合物剪切稳定性
DOI：
10.1016/0043-1648(71)90045-7
复制
发表时间：
1971
期刊：
影响因子：
5
通讯作者：
A. E. Jemmett
中科院分区：
文献类型：
--
作者：
K. Mackenzie;A. E. Jemmett
当聚合物受到机械力的作用时，分子量常常降低。对于合成聚合物，这种降解通常通过溶液中粘度的降低来测量，并且已经进行了各种尝试以将这种变化的幅度与所涉及的剪切应力、聚合物物质的分子量分布、分子几何形状和剪切和/或热效应的类型相关联。在过去的四分之一世纪的相关文献按时间顺序进行审查。一些初步的实验工作，特别是剪切应力对高分子量聚硅氧烷的影响。分子的几何形状和剪切的影响之间的关系表示。有人建议，在功能机制的剪切应力的测定是可能的。
A reduction in molecular weight frequently occurs when polymers are subjected to the action of mechanical forces. For synthetic polymers such degradation has usually been measured by the decrease in viscosity in solution, and various attempts have been made to relate the magnitude of such a change to the shear stresses involved, the molecular weight distribution of the polymer species, the molecular geometry and the type of shear and/or thermal effects. Relevant literature over the past quartercentury is reviewed in chronological order. Some initial experimental work is described with particular reference to the effect of shear stresses on high molecular weight polysiloxanes. Relationships between molecular geometry and the effects of shear are indicated. It is suggested that the determination of shear stresses in functional mechanisms may be possible.