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Abstract
Viscosity and peel strength of epoxidized natural rubber (ENR 25)-based adhesive was investigated in the presence of magnesium oxide. Petro resin and toluene were used as the tackifier and solvent, respectively. Viscosity was determined by a HAAKE Rotary Viscometer whereas peel strength was measured by a Lloyd Adhesion Tester. Results show that viscosity of adhesive increases with increasing magnesium oxide loading. However, for the peel strength, a maximum is obtained at 20 phr of magnesium oxide where maximum wettability and compatibility occurs. For a fixed filler concentration, peel strength increases with coating thickness for the three modes of peel tests.
ACKNOWLEDGMENT
The authors acknowledge the research grant (FRGS) provided by Universiti Sains Malaysia that has resulted in this article.