The effect of blending natural rubber latex (NRL) with various proportions of methyl methacrylate-grafted natural rubber latex (MGL) on the adhesive properties of NRL is reported in the paper. Blends were prepared by mixing NRL and MGL at various proportions and the adhesive properties studied. The effect of blending MGL with NRL on the glass transition temperature (Tg) of NRL was followed using differential scanning calorimetry (DSC). The adhesion strength of blends was measured by performing peel test on leather to leather joints. Brookfield viscosity, thermogravimetric analysis (TGA) and Fourier-transform infrared (FTIR) analysis of the blends were also carried out. The wettability and hydrophilicity of the NRL/MGL blends were examined by means of contact angle measurement. The effect of compounding on the NRL/MGL adhesive properties was also studied.The incorporation of MGL improved the peel strength of NRL-based adhesives. NRL/MGL adhesive showed good thermal ageing resistance compared to that of the control. The blend containing 20 wt% of MGL registered the optimum peel strength and thermal ageing resistance.
Adhesive, Blends, Methyl methacrylate-grafted latex, Natural rubber latex, Peel strength
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