Abstract
Graft copolymerization of 2-anilinoethanol (2AE) onto chitosan (Chit-g-P2AE) was carried out by using ammonium peroxydisulfate (APS) as a long initiator under nitrogen atmosphere. Evidence of grafting was confirmed by comparison of FTIR spectrum of chitosan and the grafted copolymer. The grafting kinetics in the different conditions was studied as well. The effects of concentration of APS, 2AE, reaction time and temperature on graft copolymerization were studied by determining the grafting percentage, grafting efficiency and percentage add-on. With other conditions kept constant, the optimum grafting conditions were obtained as follows: Chitosan = 1 g, APS = 0.1 M, and 2AE = 0.213 mol/L, reaction temperature = 25°C, and reaction time = 5 h. Electrical conductivities of samples were measured by four probe method. Key words: Graft copolymerization, ammonium peroxydisulfate (APS), 2-anilinoethanol (2AE), onto chitosan (Chit-g-P2AE).
Highlights
Many graft copolymers of chitosan and vinyl monomers have been synthesized and evaluated as flocculants, paper strengthener and drug-releaser (Singh et al., 2006)
Kinetics of graft copolymerization investigated from different methods (Li et al, 2002; Mahdavinia et al, 2004)
The authors have reported chemical and electrochemical synthesis of conducting graft copolymer of vinyl acetate with pyrrole and studied of its gas and vapor sensing (Hosseini et al, 2013a)
Summary
Many graft copolymers of chitosan and vinyl monomers have been synthesized and evaluated as flocculants, paper strengthener and drug-releaser (Singh et al., 2006). It has potential applications ranged from biomedicine and pharmacy to water treatment (Yu et al., 2007). Chitosan has both reactive amino and hydroxyl groups that can be used to chemically alter its properties under mild reaction conditions (Hosseini et al, 2010). The authors have reported chemical and electrochemical synthesis of conducting graft copolymer of vinyl acetate with pyrrole and studied of its gas and vapor sensing (Hosseini et al, 2013a).
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