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Zhao Z.,Northwest Normal University | Zhao Z.,Petrochemical Research Institute of LAN Zhou Petrochemical Company | Zhao X.,Northwest Normal University | Zhao X.,Petrochemical Research Institute of LAN Zhou Petrochemical Company | And 5 more authors.
Polymer - Plastics Technology and Engineering | Year: 2012

Silica- and carbon-filled styrene butadiene rubber (SBR) were prepared. The influence of particle type and silane coupling agent on cure characteristics, physical and dynamic mechanical properties of particle-reinforced SBR were investigated. Minimum torque, maximum torque and tensile strength increased with increase of the filler content. The tensile strength and elongation at break were highest for presence of bis-(3-triethoxysilylpropyl) tetrasulfide (TESPT) in silica-filled vulcanizates. The dynamic mechanical properties show that tan δ at temperatures of -20-0°C of the SiO 2TESPT/SBR vulcanizate was highest of all. Tan δ at temperatures of 50-70°C of the SiO 2TESPT/SBR vulcanizate was lower than carbon-filled SBR. © 2012 Copyright Taylor and Francis Group, LLC. Source


Yin C.,Northwestern Polytechnical University | Zhang Q.,Northwestern Polytechnical University | Gu J.,Northwestern Polytechnical University | Zhao Z.,Petrochemical Research Institute of LAN Zhou Petrochemical Company | And 4 more authors.
Polymer - Plastics Technology and Engineering | Year: 2012

Graft polymerization of vinyltriethoxysilane (VTES) onto styrene-butadiene rubber (SBR) was carried out in latex using potassium peroxydisulfate as an initiator. Then SBR-g-VTES/silica, SBR/TESPT/silica and SBR-g-VTES/TESPT/silica were prepared by mechanical mixing with different silica loading. The silica particles dispersed uniformly in the SBR-g-VTES networks. Among the three composites, the SBR-g-VTES/Silica blends show the highest of all. The t 90 of SBR-g-VTES/TESPT/Silica composites is the shortest of all. On the other hand, the SBR-g-VTES/TESPT/silica composites exhibit highest tensile strength and hardness of all. The SBR-g-VTES/silica composites show higher tensile strength and hardness than SBR/TESPT/silica. The tanδ value (loss tangent) at -20-0°C of SBR-g-VTES/silica is slightly higher than that of SBR/TESPT/silica. © 2012 Copyright Taylor and Francis Group, LLC. Source

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