Effect of bonding agent ratio on mechanical and physical properties of natural rubber compounds for rubber to textile adhesion applications

Abstract

This study aims to modify natural rubber (Hevea brasiliensis) into a compound for rubber-to-textile adhesion application using bonding agents, namely resorcinol (R) and hexamethylenetetramine (H). The composition variations of R and H were designed to be 0:0, 1:1, 1:2, and 1:3 for sample FRC-0, FRC-1, FRC-2, and FRC-3, respectively. The physical and mechanical properties, namely curing time, tensile strength, tear strength, elongation, shore A hardness, rebound resilience, density, abrasion resistance, and adhesiontest based on ASTM D1876 were determined. The results of the adhesiveness test showed that the FRC-1 formulation with 1:1 ratio of R:H has a maximum load of 195.25 N with graphical observation indicated no displacement or debonding area. In case of FRC-2, it has a lower maximum load of 105.26 N with a displacement or debonding area indicated by graphical observation. The characterization results suggested that FRC-1 sample with 1:1 ratio of R:H, showed the optimum formulation for rubber-to-textile adhesion. It forms largest adhesive product and has outstanding physical and mechanical qualities, particularly in the peel test, which measures the effectiveness of rubber-textile bonding.

Keywords

• dhesive compound
• rubber-textile adhesion
• bonding agent
• natural rubber