Abstract:The waxy corn starch-based wood adhesive was prepared in aqueous medium with the APS as the initiator,the vinyl acetate as the monomer.The effects of the adding amount of APS,grafting reaction temperature,pH,grafting reaction time、dripping time of monomer,the mass radio of monomer and starch,the degree of heat treatment temperature on the graft polymerization was studied.And the optimum conditions were acquired and listed as follows: an APS quantity of 1.16% of dry starch weight,a reacting temperature of 70 ℃,an reacting time of 3.5 h,a monomer’s adding rate of 0.1058 mL/(kg·s),a mass radio between monomer with starch of 6:5 and the heat treat conditions of 85 ℃30 min,the graft radio is largest up to 50.83%.The percent grafting and the average molecular weight of branched chain both have an good effect on the bonding strength,besides the percent grafting has a greater effect on the bonding strength than the average molecular weight of branched chain’s.
