The polymer was prepared by copolymerizing vinyl sulfonate, methyl methacrylate( MMA) and methacrylic acid( MAA) in different proportions.

• 三元树脂由乙烯基磺酸酯、基丙烯酸甲酯(MMA)甲基丙烯酸(aa)不同的配比共聚而成。