Journal
APPLIED SURFACE SCIENCE
Volume 328, Issue -, Pages 306-313Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.12.029
Keywords
Natural rubber; Epoxidized natural rubber; Silica; Composites; Interfacial interaction
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Funding
- National Natural Science Foundation of China [U1134005, 51003031]
- National Key Technology R & D Program of China [2012BAE01B03]
- Postdoctoral Science Foundation of China [2012M511798]
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The epoxidized natural rubber (ENR) as an interfacial modifier was used to improve the mechanical and dynamical mechanical properties of NR/silica composites. In order to reveal the interaction mechanism between ENR and silica, the ENR/Silica model compound was prepared by using an open mill and the interfacial interaction of ENR with silica was investigated by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), X-ray diffraction (XRD) and stress-strain testing. The results indicated that the ring-opening reaction occurs between the epoxy groups of ENR chains and Si-OH groups on the silica surfaces and the covalent bonds are formed between two phases, which can improve the dispersion of silica in the rubber matrix and enhance the interfacial combination between rubber and silica. The ring-opening reaction occurs not only in vulcanization process but also in mixing process, meanwhile, the latter seems to be more important due to the simultaneous effects of mechanical force and temperature. (C) 2014 Published by Elsevier B.V.
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