Polyvinyl alcohol (PVA) stabilized Polyvinyl acetate (PVAc) dispersions-based
wood adhesive has poor water and heat resistance. Recently, the addition of fillers in the wood adhesive is one of the most effective
ways to enhance the performance of PVAc wood adhesive. Inorganic fillers have
unique characteristics to improve the
performance of adhesive, such as small size, high surface energy and
surface hardness. Hence, the present work investigates the applicability of
calcium carbonate and clay incorporated 3% in situ emulsion polymerization PVAc wood adhesive. Effect on
physical, thermal and mechanical properties was studied by viscosity, pH,
contact angle measurement, differential scanning calorimetry (DSC) and pencil
hardness test of films.Emulsions
with 3% calcium carbonate and 3% clay were prepared and the shear
strength of the applied adhesive on wood was measured. The viscosity of the
adhesives was reduced in thecase of
the addition of calcium carbonate and
increased in the case of clay. The mechanical properties like tensile strength of adhesives with calcium carbonate and clay were measured by a universal
tensile machine (UTM). Thermal stability was studied by differential scanning
calorimetry (DSC). The tensile shear strength demonstrates that clay can
improve bonding strength as compared to
calcium carbonate of PVAc adhesive in wet
conditions. The hardness of PVAc films was also changed posi
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