聚丙烯酸水溶液的粘度和构象变化

INTRINSIC VISCOSITY AND CONFORMATION OF POLY(ACRYLIC ACID)IN AQUEOUS SOLUTION

本文测定了不同中和度聚丙烯酸在不同离子强度盐溶液中的特性粘数,研究了聚丙烯酸的分子形态及构象对聚合物浓度、电荷密度及溶液离子强度的依赖性,得到聚离子的构象变化与溶液盐浓度的对数成反比,与电荷密度的平方根成正比等规律。

The intrinsic viscosities of poly(acrylic acid) samples with various degrees of neutrali-zation were measured in the aqueous solution of different concentration of NaCl. The depen-dence of the conformation change of polyion on the concentration of polymer, the chargedensity and the ionic strength of the solution were observed. The quantitative results, thereversible relationship between the logarithm of reduced viscosity, η_(sp)/C, and the logarithmof the concentration of salts. C_s, and proportional relationship between the intrinsic visco-sity and square root of the charge density of polyion were obtained.