GRAFT-COPOLYMERIZATION OF VINYL MONOMERS ONTO CHITIN WITH CERIUM(IV) ION

被引:48
作者
KURITA, K
KAWATA, M
KOYAMA, Y
NISHIMURA, SI
机构
[1] Department of Industrial Chemistry, Faculty of Engineering, Seikei University, Tokyo, 180, Musashino-shi
关键词
D O I
10.1002/app.1991.070421104
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Graft copolymerization of vinyl compounds onto chitin was studied, and an efficient and reproducible procedure has been established, cerium (IV) being used as the initiator. The reactions with acrylamide and acrylic acid onto powdery chitin were carried out under various conditions to elucidate the polymerization behavior in terms of grafting percentage. The amount of cerium (IV) affected the polymerization most strikingly, and grafting percentages showed maxima with suitable amounts of initiator for both the monomers. As a solvent water proved to be superior to aqueous nitric acid except the reaction with a small amount of initiator. Under appropriate conditions, around 240 and 200% grafting percentages were achieved for acrylamide and acrylic acid, respectively. The resulting graft copolymers showed much improved affinity for solvents and hygroscopicity compared to the original chitin.
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页码:2885 / 2891
页数:7
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