TITLE:
Comparative Study of Effect of Addition of Calcium Carbonate and Clay on the Performance Properties of Polyvinyl Acetate Wood Glue
AUTHORS:
Ravindra V. Gadhave
KEYWORDS:
Polyvinyl Acetate, Clay, Calcium Carbonate, Polyvinyl Alcohol, Wood Adhesive
JOURNAL NAME:
Open Journal of Polymer Chemistry,
Vol.13 No.1,
February
9,
2023
ABSTRACT: 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 the case 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 positively by the addition of calcium
carbonate and clay. Thermal stability of PVAc was significantly improved as
calcium carbonate and clay were added to PVAc. Here, we did a comparative study of the effect of the addition of calcium carbonate and clay filler materials in situ polymerization of PVAc on their
different properties.