Study on the graft copolymerization of methyl acrylate onto corn starch with microwave

The graft copolymerization of starch with vinyl monomers is an important method for the chemical modification of starch, the graft copolymers have the excellent properties of the synthetic and natural polymers, this material may have application in biodegradable plastic. We have study the graft copoly-merization initiated by microwave method, using corn starch as material, methyl acrylate as monomer, ceric ammonium nitrate as initiation. We study the affection of initiation concentration, monomer concentration, grafting time, grafting temperature on graft copolymerization. The conformation of graft copolymeris is observed through IR. The results are follows: Monomer concentration is 1.16mol/L, ceric ammonium nitrate concentration is 3.10mmol/L, grafting time is 6min, under which the grafting degree and grafting efficiency are optimum.