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Grafting of polyethylenimine onto mesylated cellulose acetate polymethyl methacrylate and polyvinyl chloride

, : Grafting of polyethylenimine onto mesylated cellulose acetate polymethyl methacrylate and polyvinyl chloride. Carbohydrate Polymers 12(3): 323-328

Work on the formation of graft copolymers of cellulose derivatives has been continued by grafting poly(ethylenimine) (PEI) onto mesylated cellulose acetate (MCA) by second order nucleophilic displacement (SN2) of mesylate groups by amine groups. Three solutions each containing 5% MCA and 2.5, 5 and 10% PEI, respectively, in dimethylformamide (DMF) were reacted at C. The first solution did not form a gel, while the others formed gels (since cross-linking occurs) in 3 h and 1.5 h, respectively. This indicates aminolysis of acetate groups was taking place preferentially to the SN2 reaction. Reaction of PEI with poly(methyl methacrylate) (PMMA) led to gelation, indicating that aminolysis of ester groups was occurring even with the 'hindered' esters of PMMA. The nucleophilic reaction leading to grafting was demonstrated by reaction of PEI with poly(vinyl chloride) (PVC), which also led to gelation. These grafting reactions could be used to produce cross-linked resins with high ion-exchange capacity.


DOI: 10.1016/0144-8617(90)90073-2

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