聚天冬氨酸稀溶液的粘度特性表征

Viscosity characterization of polyaspartic acid in dilute solution

对聚天冬氨酸(PASP)稀溶液的粘度特性进行了考察,测定了30℃条件下,聚天冬氨酸在纯水溶液及NaCl水溶液中的特性粘数,考察了在不同离子强度情况下,PASP稀溶液的特性粘数的变化;同时又根据杨海洋等提出的粘度法研究高分子溶液行为的实验改进(Ⅱ)对实验进行了改进,测出了PASP在NaCl水溶液中的特性粘数[η]。

The viscometeric properties of polyaspartic acid(PASP) in dilute solution was investigated.The[η] of PASP in dilute water and NaCl solution was measured and the relationship between its [η] and ionic strength were investigated under 30℃. The relationship between its reduced viscosity and polymer concentration doesn't coincide with Huggins equation,which can be changed by adding low-molecular-weight strong electrolyte such as NaCl.The intrinsic viscosity change of PASP in different NaCl solution concentration was measured and results indicated that:the [η] of PASP is increasing with reduce the concentration of the NaCl solution.