In situ Grafting onto Silica Surface with Epoxidized Natural Rubber via Solid State Method |
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| Authors: | Haiyan Xu Jiwen Liu Liang Fang |
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| Institution: | 1. Polymer Alloy Laboratory , School of Materials Science and Technology, East China University of Science and Technology , Shanghai, P. R. China;2. Key Laboratory of Rubber‐Plastic , Ministry of Education, Qingdao University of Science and Technology , Qingdao, P. R. China |
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| Abstract: | An in situ solid state grafting reaction between epoxidized natural rubber (ENR) and silica was performed in a Haake internal mixer. Resulting ENR‐grafted silica was characterized by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA) measurements. Based on these results, it was concluded the silanol groups (Si‐OH) of silica caused the ring opening of ENR oxirane rings so that ENR was grafted onto the silica surface. Transmission electron microscopy (TEM) photographs showed ENR‐grafted silica had better dispersibility and smaller aggregates compared with the original silica. Dynamical mechanical analysis (DMA) of vulcanized rubber compounds contained ENR‐grafted silica showed the glass transition temperature (T g) of grafted ENR molecules shifted to higher temperature, from ?3°C to 20°C, indicating the mobility of ENR was greatly restricted. As a result, the compounds containing ENR‐grafted silica have higher hysteresis, and can be applied in a much wider field, such as damping materials, tires of racing cars, and so on. |
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| Keywords: | silica epoxidized natural rubber grafting solid state characterization dynamic mechanical properties |
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