相反电荷强聚电解质复合物盐溶液的粘度研究

合成了高电荷密度的磺酸基强聚电解质，考察了其与阳离子聚电解质聚二烯丙基二甲基氯化铵（PDADMAC）稀溶液复合体系的流动特性。无论外加盐浓度高低，剪切速率高于10s^-1时，复合体系都表现出牛顿流体的行为。在水溶液中，随PDADMAC的增加，复合体系的增比粘度逐渐减小；在高浓度的NaCl溶液中，随PDADMAC的增加，体系的增比粘度基本保持不变。随体系离子强度增大，复合体系增比粘度出现极大值，反映了复合聚集的加强；继续增大离子强度，则复合解离，增比粘度变小直至恒定。

Viscosity of the Oppositely- charged Strong Polyelectrolyte Complex in Brine

A sulfonic polyelectrolyte(ADPy) with high charge density was synthesized.The rheological behavior of the complex between ADPy and polycation,poly(diallyldimethylammonium chloride)(PDADMAC) was investigated.ADPy/PDADMAC dilute solution mixture is a Newtonian fluid when shear rate is higher than 10s~(-1),whether the salt concentration is high or low.The specific viscosity of the complex decreases with increasing PDADMAC content in aqueous solution,however it keeps nearly invariant in brine.When the ionic strength increases,the specific viscosity of the mixture has a maximum,which meant the completely complexation and aggregation state of ADPy and PDADMAC,and then the specific viscosity reduced to a fixed value because of the dissociation of complex.