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Changjie Y.,Northwestern Polytechnical University | Qiuyu Z.,Northwestern Polytechnical University | Dezhong Y.,Northwestern Polytechnical University | Junwei G.,Northwestern Polytechnical University | And 2 more authors.
Journal of Applied Polymer Science | Year: 2011

Graft polymerization of vinyltriethoxysilane (VTES) onto styrene-butadiene rubber (SBR) was carried out in latex using benzoic peroxide (BPO) as an initiator. The concentration of VTES effecting on vulcanization characteristics, mechanical properties and thermal properties of VTES-grafted SBR (SBR-g-VTES) were investigated. The grafting of VTES onto SBR and its pre-crosslinking were confirmed by attenuated total teflectance-Fourier transform infrared reflectance and proton nuclear magnetic resonance. The mechanism of graft polymerization was studied. The results revealed that the minimum torque, optimum cure time, tensile strength, thermal decomposition temperature, and glass transition temperature (T g) all increased with the increasing concentration of VTES. But the grafting efficiency of VTES, rate of vulcanization, and elongation at break of the SBR-g-VTES decreased. © 2010 Wiley Periodicals, Inc. Source

Yin C.,Northwestern Polytechnical University | Zhang Q.,Northwestern Polytechnical University | Gu J.,Northwestern Polytechnical University | Zheng J.,LAN Zhou Petrochemical Company | And 3 more authors.
Journal of Applied Polymer Science | Year: 2013

Grafting polymerization of vinyltriethoxysilane (VTES) onto styrene-butadiene rubber (SBR) was firstly carried out in latex, using potassium persulfate (KPS) as initiator. The grafted SBR was further reinforced with silica produced by sol-gel reaction of tetraethoxysilane (TEOS). The grafted of VTES onto SBR was characterized and confirmed by ATR-FTIR and 1H-NMR. Results revealed that the addition of VTES could considerably improve the content of silica, bound rubber in SBR and utilized efficiency of TEOS. Meanwhile, the curing characteristics and mechanical properties of the vulcanized in situ reinforced SBR-g-VTES were also investigated and compared with that of the silica-reinforced SBR prepared by mechanical mixing. The delta torque, tensile, and tear strength of in situ reinforced SBR-g-VTES were higher than that of silica-reinforced SBR. Dynamic mechanical analysis showed that the interaction between silica and SBR of in situ reinforced SBR-g-VTES was also better than that of the silica-reinforced SBR. Copyright © 2012 Wiley Periodicals, Inc. Source

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