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2006•Journal of Henan University of TechnologyRequires access

STUDY ON GRAFTING KINETICS AND REACTION MECHANISM OF CROSS-LINKED STARCH/ACRYLONITRILE

Zhang Yu-jun, Jierong Chen, Feng Qing-mei

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Abstract

The graft copolymerization of cross-linked starch/ acrylonitrile with ceric ammonium nitrate(CAN) as initiator was studied.The effect of initiator concentration,monomer concentration,and starch concentration on the grafting reaction rate was examined.The rate equation has been derived and a suitable kinetic scheme has been proposed.For 0.006 mol/L,the reaction rate is,R_p=k~(2)[Ce~(4+)]~(2)[M],and for 0.006 mol/L,it is R_p=Kk_dk_t″k_p·[L-STOH][M]~2k_i[M]+k_0[Ce~(4+)].

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What this paper is about

The graft copolymerization of cross-linked starch/ acrylonitrile with ceric ammonium nitrate(CAN) as initiator was studied.The effect of initiator concentration,monomer concentration,and starch concentration on the grafting reaction rate was examined.The rate equation has been derived and a suitable kinetic scheme has been proposed.For 0.006 mol/L,the reaction rate is,R_p=k~(2)[Ce~(4+)]~(2)[M],and for 0.006 mol/L,it is R_p=Kk_dk_t″k_p·[L-STOH][M]~2k_i[M]+k_0[Ce~(4+)].

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Available abstract

The graft copolymerization of cross-linked starch/ acrylonitrile with ceric ammonium nitrate(CAN) as initiator was studied.The effect of initiator concentration,monomer concentration,and starch concentration on the grafting reaction rate was examined.The rate equation has been derived and a suitable kinetic scheme has been proposed.For 0.006 mol/L,the reaction rate is,R_p=k~(2)[Ce~(4+)]~(2)[M],and for 0.006 mol/L,it is R_p=Kk_dk_t″k_p·[L-STOH][M]~2k_i[M]+k_0[Ce~(4+)].

Key concepts: Acrylonitrile, Ceric ammonium nitrate, Grafting, Starch, Monomer, Chemistry, Copolymer, Polymer chemistry

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