论文部分内容阅读
２－丙烯酰胺基－２－甲基丙磺酸（ＡＭＰＳ）与甲基丙烯酸－２－羟基丙酯（ＨＰＭ）在乙二醇／水（１∶１，质量比）中７０℃下进行共聚，ＡＭＰＳ／ＨＰＭ（８∶２，摩尔比）为该体系的恒比共聚点．在此组成加入交联剂Ｎ，Ｎ－亚甲基双丙烯酰胺２％、３％和５％（摩尔分数）制备了凝胶试样Ｇ０２、Ｇ０３、Ｇ０５．它们在ＤＭＳＯ／ＴＨＦ混合溶剂中ＴＨＦ达５５％～６０％（体积百分数）时发生体积相变；在乙醇／ＴＨＦ混合溶剂中Ｇ０３的体积随ＴＨＦ的加入连续缩小，但不出现体积相变．此现象可用高分子链溶剂化层的变化以及低极性介质中离子对之间的偶极－偶极相互作用来说明．
2-acrylamido-2-methylpropanesulfonic acid (AMPS) and 2-hydroxypropyl methacrylate (HPM) were copolymerized at 70 ° C in ethylene glycol / water (1: 1, mass ratio) AMPS / HPM (8: 2, molar ratio) is the constant ratio copolymerization point of the system. The gel samples G02, G03 and G05 were prepared by adding 2%, 3% and 5% (mole fraction) of crosslinking agent N, N-methylenebisacrylamide. Their volumetric phase transitions were observed when 55% ~ 60% THF in THF / THF mixed solvent was used. The volume of G03 in ethanol / THF mixed solvent decreased continuously with the addition of THF, but the volume phase change did not occur. This phenomenon can be explained by changes in the solvation of the polymer chains and by dipole-dipole interactions between ion pairs in low-polarity media.