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Study on chemical, UV and gamma radiation-induced grafting of 2-hydroxyethyl methacrylate onto chitosan |
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| Authors: | M H Casimiro M L Botelho J P Leal M H Gil |
| Institution: | a Department of Physics, Nuclear and Technological Institute, E.N. 10, 2686-953, Sacavém, Portugal b Department of Chemistry, Nuclear and Technological Institute, E.N. 10, 2686-953, Sacavém, Portugal c Department of Chemistry and Biochemistry, Faculty of Sciences, University of Lisboa, 1749-016, Lisboa, Portugal d Department of Chemical Engineering, Faculty of Science and Technology, University of Coimbra, Pólo II Pinhal de Marrocos, 3030-290, Coimbra, Portugal |
| Abstract: | In the present study, 2-hydroxyethyl methacrylate has been grafted onto chitosan by using either chemical initiation, or photo-induction or gamma radiation-induced polymerisation, all under heterogeneous conditions. The evidence of grafting was provided by Fourier transform infrared spectroscopy and thermal analysis. The results concerning the effect of initiator concentration, initial monomer concentration and dose rate influencing on the yield of grafting reactions are presented. These suggest that gamma irradiation is the method that leads to higher yields of grafting. |
| Keywords: | Chitosan HEMA Graft copolymerisation |
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