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Grafting of hyperbranched polymer onto the nanosilica surface and their effect on the properties of UV-curable coatings

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Abstract

The nanosilica is first treated with 3-mercaptopropyl trimethoxysilane (MPTMS) to introduce mercapto groups as growth points, and then hyperbranched polymer is grafted on the nanosilica surface via repeated step of thiol-ene click reaction between the acrylate double bond of trimethylolpropane triacrylate (TMPTA) and mercapto groups of trimethylolpropane tris 3-mercaptopropionate (Trithiol). FTIR results confirm that the grafting procedure is feasible, and TGA results indicate the grafting ratio is as high as 45.0 %. The curing kinetic, monitored by photo-DSC, shows that both terminal acrylate double bonds and mercapto groups can accelerate the curing speed of the UV-curing organic–inorganic hybrid coatings. The mechanical and physical properties of UV-curable hybrid coatings containing modified nanosilica at different generations are also investigated.

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Acknowledgments

This study was supported by the Important Specialized Science and Technology Item of Shanxi Province of China (No. 20111101059) and the Postgraduate Innovation Item of Shanxi Province (20133030), which are gratefully acknowledged.

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Authors and Affiliations

  1. Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education and Shanxi Province, Taiyuan, 030024, China

    Jianbing Wu & Baojun Wang

  2. Shanxi Research Institute of Applied Chemistry, Taiyuan, 030027, China

    Jianbing Wu & Guozhang Ma

  3. Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan, 030024, China

    Lixia Ling

Authors
  1. Jianbing Wu
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  2. Guozhang Ma
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  3. Lixia Ling
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  4. Baojun Wang
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Correspondence to Baojun Wang.

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Wu, J., Ma, G., Ling, L. et al. Grafting of hyperbranched polymer onto the nanosilica surface and their effect on the properties of UV-curable coatings. Polym. Bull. 73, 859–873 (2016). https://doi.org/10.1007/s00289-015-1523-0

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  • DOI: https://doi.org/10.1007/s00289-015-1523-0

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