Characterizing Mechanical Properties of Peroxide-Vulcanized Natural Rubber Latex Films

摘要

This study examined the physical properties of peroxide-vulcanized natural rubber latex films. Data obtained from the crosslink density measurement were used to evaluate the effectiveness of hydroxyacetone as a novel activator for tert-buthyl hyroperoxide in prevulcanization of natural rubber latex. Increasing the tBHP-HAC levels were found to increasing the crosslink density values. The optimum prevulcanization temperature and time with respect to maximum tensile strength were observed to occur to the film prepared at temperature of 60°C with 3 hours of the heating time. The drying temperature affect the mechanical properties of peroxidevulcanized natural rubber latex films as the tensile strength values tended to decrease at drying temperature above 120°C. The highest tensile strength value was observed on film dried at 110°C for 20 minutes. Addition of Irganox 1520 antioxidant is import in production of peroxidevulcanized natural rubber latex films, as the antioxidant inhibits the thermal-oxidation to taking place, and thus, greater coherence and improvement in tensile strength of the films by heat treatment could be achieved.