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An outstanding heat-resistant hydroxyl boron–silicone oil with hyperconjugation action in backbone

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Abstract

A high heat-resistant hydroxyl boron–silicone vinylidene oil (HBSVO) was synthesized by copolymerizing hydroxyl polyborosiloxane oil (HPBSO) prepolymer with fumaryl chloride. The temperature at 5% mass loss (T5), 10% mass loss (T10), and maximum decomposition rate (Tmax) of HBSVO was 515, 550, and 600 °C, respectively. The structure –Si–O–B–O–C(=O)–CH=CH–C(=O)– in the backbone of HBSVO might cause a tendency to form a five-member ring structure by hyperconjugation action between boron atom and vinylidene groups. The hyperconjugation action, which improved the heat-resistant and hydrolysis-resistant properties of HBSVO, was confirmed by UV spectroscopy, 11B-NMR, and 1H-NMR. The chemical moieties (–Si–O–B–O–C(=O)–CH=CH–C(=O)–) were also identified by Fourier transform infrared (FT-IR) and 29Si-NMR (CDCl3) spectroscopies.

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Acknowledgements

The authors acknowledge financial support from the Fundamental Research Funds for the Central Universities (JD2016JGPY0002) and the funds of Hefei Research Institute (IMICZ2015103).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, 230009, China

    Zhengfa Zhou, Hongkun Shen, Fengmei Ren, Haihong Ma, Weibing Xu & Shuqian Zhou

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  1. Zhengfa Zhou
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  2. Hongkun Shen
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Correspondence to Fengmei Ren.

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Zhou, Z., Shen, H., Ren, F. et al. An outstanding heat-resistant hydroxyl boron–silicone oil with hyperconjugation action in backbone. J Therm Anal Calorim 132, 1825–1831 (2018). https://doi.org/10.1007/s10973-018-7065-6

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  • DOI: https://doi.org/10.1007/s10973-018-7065-6

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