Abstract:

The homogeneous graft copolymerization of ε-caprolactone(ε-CL)onto chitosan(CS)in ionic liquid 1-butyl-3-methylimidazolium acetate(［BMIM］Ac)was studied. The effect of various reaction parameters on grafting percentage was evaluated and the obtained graft copolymer was characterized by FTIR，¹H NMR，TGA and XRD. The results showed that graft copolymerization occurred with high reaction efficiency under the homogeneous conditions，and the grafting percentage of 250% was achieved at temperature 105℃，time 8 h，catalyst concentration 0. 1%（mass） of ε