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Preparation of nano poly(phenylsilsesquioxane) spheres and the influence of nano-PPSQ on the thermal stability of poly(methyl methacrylate)

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Abstract

The nano poly(phenylsilsesquioxane) spheres (nano-PPSQ) were prepared by the sol–gel method and incorporated into poly(methyl methacrylate) (PMMA) by in situ bulk polymerization of methyl methacrylate. The structure of nano-PPSQ was confirmed by transmission electron microscope and thermogravimetry analysis (TG). The interaction between nano-PPSQ and PMMA was investigated by Fourier transform infrared spectra (FT-IR). The influence of nano-PPSQ on the thermal stability of PMMA was investigated by TG and differential scanning calorimetry (DSC) measurements. The results indicated that nano-PPSQ enhanced the thermal stability and the temperatures of glass transition (T g) of nanocomposites. The effect of the heating rate in dynamic measurements (5–30 °C min−1) on kinetic parameters such as activation energy by TG both in nitrogen and air was investigated. The Kissinger method was used to determine the apparent activation energy for the degradation of pure PMMA and nanocomposites. The kinetic results showed that the apparent activation energy for degradation of nanocomposites was higher than that of pure PMMA under air.

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Acknowledgements

This study was supported by Nanjing University of Science & Technology Research Funding (No. 2010GJPY045).

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Authors and Affiliations

  1. School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, 210094, China

    Xinlong Wang, Lianghu Wu & Jin Li

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  1. Xinlong Wang
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  2. Lianghu Wu
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  3. Jin Li
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Correspondence to Xinlong Wang.

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Wang, X., Wu, L. & Li, J. Preparation of nano poly(phenylsilsesquioxane) spheres and the influence of nano-PPSQ on the thermal stability of poly(methyl methacrylate). J Therm Anal Calorim 109, 323–329 (2012). https://doi.org/10.1007/s10973-011-1619-1

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  • DOI: https://doi.org/10.1007/s10973-011-1619-1

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