论文部分内容阅读
对在低剪切速率下两种不同化学结构的离子型聚合物的流变性质进行了实验室研究。用毛细管粘度计在2～200s~(-1)的低剪切速率范围内获得了精确的粘度测量数据。聚合物溶液从牛顿到剪切稀化性质的转化在临界剪切速率时有明显标志,并和聚合物及盐的浓度有关。近期开发的MS—784,即N—乙烯基甲酰胺共聚物,和丙烯酰胺及AMPS·Na的共聚物相比表现了更宽的牛顿区域和在剪切稀化曲线上更平稳的递减斜率。与MS—784相比,MS—7917的粘度随聚合物浓度表现出更明显的增大。
Laboratory studies were conducted on the rheological properties of two ionic polymers of different chemical structures at low shear rates. Accurate viscosity measurements were obtained with a capillary viscometer in the low shear rate range of 2 to 200 s -1. The conversion of the polymer solution from Newtonian to shear thinning properties is clearly marked at the critical shear rate and is related to the polymer and salt concentration. Recently developed MS-784, a copolymer of N-vinylformamide, exhibits a broader Newtonian region and a smoother decreasing slope on the shear-thinning profile than copolymers of acrylamide and AMPS-Na. Compared to MS-784, the viscosity of MS-7917 showed a more pronounced increase with polymer concentration.