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Radiation-induced grafting of N,N′-dimethylaminoethylmethacrylate onto chitosan films

✍ Scribed by Dinesh K. Singh; Alok R. Ray

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
190 KB
Volume
66
Category
Article
ISSN
0021-8995

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✦ Synopsis

Chitosan films were grafted with N,N-dimethylaminoethylmethacrylate using the 60 Co gamma irradiation method. The effect of solvent composition, monomer concentration, dose rate, and total dose on grafting was studied. The solvent composition has a marked effect on the degree of grafting. Maximum yield was obtained in the water-methanol (1 : 1) system. The percent grafting increased with monomer concentration and was found to be higher at a lower dose rate for a constant total dose of 0.216 Mrad. The tensile strength, crystallinity, and degree of swelling of grafted films decreased on increasing graft level. However, the graft copolymers showed improved thermal stability.

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