聚(丙烯酰胺-丙烯酸十八醇酯)疏水缔合行为及环境影响因素

研究了疏水单元丙烯酸十八醇酯与丙烯酰胺-丙烯酸十八醇酯共聚物水溶液性质的关系,及乳化剂SDS、NaCl等因素对共聚物疏水缔合行为的影响。结果表明,疏水单元丙烯酸十八醇酯在共聚物水溶液中的摩尔分数0.64%左右时,共聚物水溶液表现出高的表观黏度;一定质量分数(0.5%)SDS与共聚物水溶液可以形成特殊的微结构,有极强的协同效应,共聚物水溶液的表观黏度迅速增大,其值从未加SDS的35 mPa.s增加到6000 mPa.s;当共聚物水溶液处于临界缔合浓度以上时,NaCl的加入使表观黏度迅速上升,共聚物表现出较好的抗盐性。

Hydrophobically Associating of Acrylamide-octadecyl Acrylate Copolymer and Influencing Factors

A series of hydrophobically associating copolymers of acrylamide with octadecyl acrylate were synthesized in this paper.The effects of amount of OA in the copolymers,SDS concentration,and NaCl concentration on the rheological behavior of copolymers aqueous solution were investigated.The results showed that the copolymer aqueous solution have a higher value of apparent viscosity,when the amount of OA in copolymers was about 0.64%.The apparent viscosity of copolymer aqueous solution increased greatly with the 0.5% concentration of SDS,ranging from 35 mPa·s up to 6000 mPa·s.The addition of NaCl to the polymer solution led to a rapid rise of the apparent viscosity of the solution,contrary to what is observed in partially hydrolyze poly(acrylamide)(HPAM).