疏水缔合共聚物的合成及溶液性质

 采用自由基胶束聚合法成功制备了丙烯酰胺(AM)/甲基丙烯酸十八酯(SMA)/2-甲基-2-丙烯酰胺基丙磺酸(AMPS)三元疏水缔合共聚物(HAPAM).考查了引发温度、单体质量分数、表面活性剂含量、疏水单体含量、单体配比以及引发剂浓度对共聚物表观黏度的影响,在聚丙烯酰胺(PAM)大分子主链上引入阴离子基团和疏水基团后,阴离子的电黏效应与疏水基团的疏水缔合作用相互协同,使得共聚物水溶液的黏度明显提高.利用FTIR光谱对共聚物结构进行表征,用RF-5301型荧光分光光度仪研究证实了共聚物在水溶液中的缔合行为.采用Brukerfiled流变仪对所合成的疏水缔合共聚物水溶液的流变行为进行研究.

Synthesis of Hydrophobically Associated Copolymer Three-Component Copolymer and Their Properties

Hydrophobically associated poly (AM/AMPS/SMA) were prepared by free radical micellar copolymerization. The structure of the copolymer was characterized by FTIR. The influences of several factors on the apparent viscosity are studied, such as the initiation temperature, the amount of initiator, the monomer concentration, the hydrophobic monomer concentration, the surfactant concentration, and the monomer proportion. The results show that after incorporating anions and hydrophobic groups at the same time in the backbone of the polyacrylamide, the viscosity of the copolymer aqueous solution increases significantly under the coordination of the electric viscosity of anions and the hydrophobic association property of hydrophobic group. The hydrophobic associative behavior of the copolymer is studied by the fluorescence probe technique and, at the same time, the rheological properties of the copolymer aqueous solution are also investigated.