水溶性疏水缔合型聚(丙烯酰胺-丙烯酸十六酯)溶液性质的研究

采用沉淀聚合法制备水溶性的丙烯酰胺－丙烯酸十六疏水缔合型共聚物，研究了共聚物水溶液的性质及其影响因素。随着疏水基团含量增加，共聚物在纯水中及NaCl溶液中的特性粘数η]均减小，疏水基团临界缔合浓度降低。共聚物溶液浓度高于监界缔合浓度时，溶液表现粘度急剧增加，表明溶液中分子间缔合大量形成。

Studies on The Solution Properties of Water-Soluble Hydrophobically Associating Acrylamide-Hexadeyl Acrylate Copolymers

A number of water soluble acrylamide hexadeyl acrylate copolymers of hexadeylate content 0.17, 0.31, 0.49, 0.72, 1.10 and 1.33 mol% were synthesized by precipitation copolymerization. The intrinsic viscosity and critical aggregation concentration (C *) of the copolymers decrease with hexadeylate content increase. The copolymers show dramatic increase in apparent viscosity in 1.5%NaCl solution. The unique effects of surfactant SDS and temperature on the solution viscosity of these copolymers are observed. All the experimental results are explained in terms of intra and intermolecular hydrophobical associations, which are relatively weak to thermal and shear action.