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采用丙烯腈共聚物水解法制备了羧酸型阳离子交换树脂，并测定了其交换当量，该法得到的阳离子交换树脂，其性能达到国产同类树脂D111的技术标准。“,”Cation exchange resin of carboxylic acid has been prepared by hydrolysis of acrylonirile copolymer, and their exchange equivalents have been determined. The performance of the resin reach the technological standard of same resin, D111 made in our country.