疏水缔合聚合物溶液的临界缔合浓度

为了从本质上说明缔合聚合物溶液的临界缔合浓度和其增黏机理,开展了缔合聚合物荧光光谱实验和在不同水质中的增黏性实验.结果表明:在缔合聚合物溶液中存在着两个临界缔合浓度(CAC1和CAC2),在黏浓关系研究中的临界缔合浓度是指第二临界缔合浓度(CAC2);缔合聚合物在人造淡水中的临界缔合浓度(800mg/L)远低于蒸馏水中的临界缔合浓度(2500mg/L);缔合聚合物在人造淡水中的黏度远高于其在蒸馏水中的黏度,说明缔合聚合物溶液具有较好的抗盐性;在蒸馏水中,MO4000溶液的黏度总比缔合聚合物溶液的黏度高,而在人造淡水中,缔合聚合物溶液的黏度却比MO4000溶液的高;在整个浓度范围内,聚合物MO4000在蒸馏水中的黏度总比在人造淡水中的黏度高,说明MO4000溶液的抗盐性差.

Study on critical associating concentration of hydrophobic associating polymer solution

In order to explain the critical associating concentration and thickening mechanism of associating polymer solution,the fluorescence spectrum experiment and thickening performance experiment of it in different water are carried out.The results show that the associating polymer solution has two critical association concentrations,the critical association concentration in the study on the relationship between the viscosity and concentration of polymer solution is actually the second critical association concentration;the critical association concentration of the associating polymer in the man-made fresh water (800 mg/L) is a lot lower than that in distilled water (2 500 mg/L);the viscosity of its man-made fresh water solution is a lot higher than that its distilled water solution,which shows that the association polymer solution is of better salt resistance;the viscosity of the distilled water solution of MO4000 is always higher than that of the association polymer,while the viscosity of the man-made fresh water solution of the association polymer is higher than that of MO4000;in the studied range of concentration,the viscosity of the distilled water solution of MO4000 is always higher than that of its man-made fresh water solution,which shows that MO4000 is of poorer salt resistance.