Papers by Author: Yi Qing Wang

Abstract: Styrene butadiene rubber (SBR)/clay/carbon black (CB) nanocomposites filled with 60 phr filler (in total) were prepared by adding CB to SBR/clay nanocompound in a two-roll mill. TEM photographs of the nanocomposites showed that both fillers were dispersed randomly in the SBR matrix at nano-scale. With the increase of CB content, stress at 300% strain and tensile strength of the nanocomposites increased, while elongation at break and permanent set of the nanocomposites decreased. On the other hand, with the increase of clay content, the aging resistance of the SBR nanocomposites was improved.

Abstract: Rubber/clay nanocomposites have been explored as alternative materials to replace expensive halogenated butyl rubber. In order to further improve their gas barrier properties, a simple and efficient method through sulfur modification was applied in this work. Excess sulfur was added into SBR/clay nanocompound to prepare sulfur modified nanocomposite via the formation of cyclic sulfide in addition to crosslinking. The vulcanization behavior, mechanical properties, dynamic mechanical property and gas barrier property of the nanocomposites were investigated. It was found that the sulfur modified SBR/clay nanocomposites showed much increased glass transition temperature and lower gas permeability.