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采用激光光散射研究了一种主链为聚丙烯酸侧链为聚乙二醇的梳形共聚物分散剂的一些溶液行为.从静态光散射得出了较为合理的表观重均分子量、均方旋转半径等参数.动态光散射给出了流体力学半径分布及其角度和浓度依赖性.结合静态和动态光散射,上述梳形共聚物分散剂在溶液中的构象也得到初步的表征.通过与描述梳形聚合物的Gay-Raphae模型进行比较表明,这类梳形共聚物溶液在低盐离子和低pH值条件下存在聚集行为,形成以PAA主链为核PEG为壳层的类胶束聚集.
Some solution behaviors of the comb-shaped copolymer dispersant with the main chain of polyacrylic acid as polyethylene glycol were investigated by laser light scattering. The reasonable apparent weight average molecular weight was obtained from static light scattering. The mean square Radius of gyration, etc. The dynamic light scattering gives the distribution of hydrodynamic radius and its dependence on concentration and concentration.Considering the static and dynamic light scattering, the conformation of the comb copolymer dispersant in solution has also been preliminarily characterized. The Gay-Raphae model describing the comb polymer shows that the aggregation behavior of the comb copolymer solution under low salt and low pH conditions results in the formation of a micellar micelle with a PAA backbone as the core Gather together.