In situ radical transfer addition polymerization of styrene from silica nanoparticles |
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Authors: | P. Liu W.M. Liu |
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Affiliation: | a Department of Chemistry, Lanzhou University, Tianshui Road 298, Lanzhou 730000, China b State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract: | The in situ radical transfer addition polymerization of styrene from silica nanoparticles was carried out by the free radical polymerized of styrene in the presence of mercaptopropyl-modified silica nanoparticles as chain-transfer agent. The effects of the amount of the initiator, polymerizing temperature and polymerizing time on the convention of styrene (C) and the percentage of grafting were investigated. Results of elemental analysis, IR, X-ray photoelectron spectrometer and transmission electron microscope demonstrated that the desired polymer chains have been covalently bonded to the surface of the silica nanoparticles. A C of 42.56% and a PG of 38.10% could be achieved with the optimal condition. The polystyrene grafted silica nanoparticles could be separated and used as nanofiller for polymers. |
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Keywords: | Polystyrene grafted silica nanoparticles (PS-SNs) In situ radical transfer addition polymerization Nanofiller |
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