2000•Unpublished venueRequires access

REACTION MECHANISM OF STARCH/PAN GRAFT COPOLYMERIZATION BY KMnO_4

Gao Jian

Abstract

The mechanism of starch/acrylonitrile graft copolymerization of by potassium permangate was studied. The relationships between grafting rate and initiator concentration, monomer concentration, starch concentration and reaction temperature were obtained, based on which the equation for the graft copolymerization was derived and the apparent activation energy was calculated. ESR analysis, together with other experiments, showed that the valence of manganic ion changed from Mn(Ⅶ), through Mn(Ⅵ) and Mn(Ⅲ), to Mn(Ⅱ). Meanwhile, hydroxide group on starch was oxided to aldehyde or furtherly to hydrocarb. These results are helpful to establish a supposed mechanism for the graft copolymerization.

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Key concepts: Acrylonitrile, Copolymer, Starch, Grafting, Monomer, Polymer chemistry, Reaction mechanism, Activation energy