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Silica Reinforcement (silica + reinforcement)
Selected AbstractsOptimization of physico-mechanical properties of silica-filled NR/SBR compoundsADVANCES IN POLYMER TECHNOLOGY, Issue 4 2009D. Salimi Abstract In this extended study, the effect of silica reinforcement on natural rubber (NR) and NR/styrene,butadiene rubber (SBR) compounds was studied. The silica surfaces were treated with bis(3-triethoxysilylpropyl)-tetrasulfide, which is a silane-coupling agent, to chemically bond the silica to the rubber. Optimum levels of silane were determined according to the silica loading in NR compounds. Results in NR/SBR compounded with optimum levels of silane show that the cure time decreases with increasing NR content. Also, the tensile properties of the NR/SBR blends decrease with increasing SBR content. This study further confirmed that filler materials affect the physical and mechanical properties of these blends. © 2010 Wiley Periodicals, Inc. Adv Polym Techn 28:224,232, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/adv.20169 [source] Effect of silica reinforcement on natural rubber and butadiene rubber vulcanizates by a sol,gel reaction with tetraethoxysilaneJOURNAL OF APPLIED POLYMER SCIENCE, Issue 6 2008Kyong-Hwan Chung Abstract The effect of silica reinforcement was studied for natural rubber (NR) and butadiene rubber (BR) vulcanizates by a sol,gel reaction with tetraethoxysilane at different temperatures. The formation of silica in the rubber vulcanizates was investigated analytically with Fourier transform infrared spectroscopy and energy-dispersive X-ray analysis. The variations of the mechanical and dynamic properties were measured in the NR and BR vulcanizates with silica filling. The hardness of the rubber vulcanizates increased with silica filling in the rubber matrix. The tensile strength and elongation at break decreased with silica filling in the NR vulcanizates. The moduli at 50, 100, and 300% elongation increased with silica filling in the rubber matrix. The storage modulus of silica-filled rubber vulcanizates became higher than that of pure rubber vulcanizates. The temperature dependence of the loss modulus also increased with silica filling. The temperature dependence of the loss tangent was maintained, regardless of silica filling in the BR vulcanizates. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci 2008 [source] Effects of rubber type on the curing and physical properties of silica filled rubber compoundsPOLYMERS FOR ADVANCED TECHNOLOGIES, Issue 8 2008Chung Ho Shin Abstract As environmental regulations are getting stricter, tire industries for automobiles have shown much interest in substituting silica for conventional carbon black partially or entirely. To take full advantage of silica as fillers for rubbers, it is essential to find a reasonable rubber system that shows an excellent performance with silica reinforcement. Therefore, in this study, several different rubber compounds comprising the same amount of silica were prepared with several different rubber systems, respectively. The processability, curing characteristics, and mechanical and viscoelastic properties of the rubber compounds were investigated to analyze the performance of the rubber compounds as tire tread materials. Among the rubber compounds studied, SBR1721 compound comprising natural rubber (NR) and styrene butadiene rubber (SBR) with high styrene content was considered the most appropriate for application to tire tread materials. Copyright © 2008 John Wiley & Sons, Ltd. [source] | ||||||||||