Enhancement of polystyrene composites by hyper-branched polymer-grafted nano-SiO2 |
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| Authors: | Xiang Xu Yanning Zeng |
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| Affiliation: | 1. Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin, People’s Republic of China;2. College of Material Science and Engineering, Guilin University of Technology, Guilin, People’s Republic of China |
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| Abstract: | Hyper-branched poly(styrene) (HPS) made from copolymerisation of styrene (St) and a branching monomer divinylbenzene (DVB) in the presence of a chain transfer agent n-dodecanethiol (C12SH) was grafted onto the surface of nano-SiO2 via emulsion polymerisation (donated as HPS-SiO2). A series of PS/HPS-SiO2 composites were obtained by the addition of prepared HPS-SiO2 into the pure PS. The structures and properties of the product were characterised by Fourier-transform infrared spectra (FT-IR), differential scanning calorimetry, thermogravimetric analysis and dynamic mechanical analysis (DMA). The results showed a strong interface interaction between HPS and nano-SiO2 indicating that the HPS has grafted onto the surface of nano-SiO2. The storage modulus, Young’s modulus, glass transition temperature (Tg) and thermal decomposition temperature of the composite were increased apparently by loading an appropriate amount of HPS-grafted SiO2. |
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| Keywords: | Hyper-branched polystyrene composites HPS-grafted SiO2 |
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