The Effects of Silanized Ultrafine Silica on the Curing Characteristics, Tensile Properties, and Morphological Study of Natural Rubber Compounds

摘要

The curing characteristics, tensile properties, and morphological of untreated and silanized ultrafine silica filled natural rubber with bis[(3-triethoxysilylpropyl)tetra sulfide] (Si-69) were studied. The results show the scorch time and cure time of silanized silica was shorter as compared to untreated silica at the same filler loading. On tensile properties, the presence of Si-69 had improved the tensile strength, elongation at break, tensile modulus and hardness of ultrafine silica after silanized silica show higher values compared to untreated silica. The scanning electron microscopy study indicated that silanized silica has better filler-rubber interaction compared to untreated silica.