Abstract:The effects of starch/VAc(vinyl acetate) monomerratio on the shear strength, grafted parameter and storage stability of starch-based wood adhesive were studied. It was shown that, although the graft percentage, graft efficiency and dry shear strength of the starch adhesive produced when the starch/VAc monomerratio is 7∶3, respectively decreased by 23.8%, 21.1% and 8.6％, undergo freeze-thaw cycle four times less when compared with the conventional proportional (starch/VAc monomerratio is 5∶5), the amount of starch was increased by 40% which significantly improved the environmental performance, so the starch/VAc monomerratio was selected as 7∶3. And then acidolysis condition on the characteristics of wood adhesive contains large amounts of starch were studied. Comprehensive study of storage stability and bond strength, select acid hydrolysis time was 2 h. Then on this basis, the wood adhesive contains large amounts of starch was prepared. The action mechanism of acidolysis on characteristics of starch adhesive and graft copolymerization reaction was analyzed.
