VINYL ALCOHOL-BASED GRAFT POLYMER, METHOD FOR PRODUCING SAME, AND ION-EXCHANGE MEMBRANE USING SAME
申请人:Kuraray Co., Ltd.
公开号:EP2930193A1
公开(公告)日:2015-10-14
Provided are (1) a vinyl alcohol graft copolymer grafting polymerizable unsaturated monomers as a graft chain onto a side-chain mercapto group-containing vinyl alcohol polymer backbone, the graft chain being attached to the polymer backbone at a mercapto group, and the backbone including: a vinyl alcohol unit and a unit represented by the following formula (I):
wherein R1 is a hydrogen atom or a carboxyl group; R2 is a hydrogen atom, a methyl group, a carboxyl group, or a carboxymethyl group; and X is a divalent C1-22 group which contains a carbon atom and a hydrogen atom and may contain a nitrogen atom and/or an oxygen atom; and (2) an ion-exchange membrane having controlled swelling in water and excellent flex resistance, the membrane including a vinyl alcohol graft copolymer as described above.
提供了(1)一种乙烯醇接枝共聚物,将可聚合的不饱和单体作为接枝链接枝到含有侧链巯基的乙烯醇聚合物骨架上,接枝链在巯基处连接到聚合物骨架上,骨架包括:乙烯醇单元和由下式(I)表示的单元:
其中 R1 是氢原子或羧基;R2 是氢原子、甲基、羧基或羧甲基;X 是二价 C1-22 基团,该基团含有一个碳原子和一个氢原子,并可能含有一个氮原子和/或一个氧原子;以及 (2) 一种离子交换膜,该膜具有可控的水中溶胀性和优异的抗弯曲性,该膜包括上述乙烯醇接枝共聚物。