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Nitrocellulose-based hybrid materials with T7-POSS as a modifier: effective reinforcement for thermal stability, combustion safety, and mechanical properties

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Abstract

Novel nitrocellulose (NC)-based hybrid materials with self-synthesized heptaphenyltricycloheptasiloxane trihydroxy silanol (T7-POSS) as a modifier were prepared using a “one-step” chemical cross-linking process. To comprehensively demonstrate the superiority of the modifier, hybrid materials with different contents of T7-POSS were assessed. The gel content was measured, and the chemical structure and composition of the T7-POSS-NC hybrid materials were characterized by attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). Thermogravimetric analysis (TGA) results showed that the thermal stability of the T7-POSS-NC hybrid materials increased with the T7-POSS content. Typically, when 12.3 wt.% T7-POSS was incorporated into the NC, the decomposition temperature based on 50% weight loss (T50%) was delayed from 183.3 °C to 243.5 °C, the maximum weight loss rate (WLRmax) decreased markedly from 432.9%/min to 1.3%/min, and the char residues increased from 1.4% to 26.0%. The scanning electron microscopy (SEM) results of the char residues indicated that the introduction of T7-POSS led to the formation of a sufficient and compact char layer. Notably, the incorporation of T7-POSS improved not only the combustion safety according to micro-scale combustion calorimeter (MCC) results but also the mechanical prop-erties due to the formation of cross-linking networks and the good distribution of T7-POSS particles, which was confirmed by SEM and energy-dispersive spectroscopy (EDS).

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Acknowledgements

The authors thank the National Natural Science Foundation of China (No. 21474008).

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Authors and Affiliations

  1. National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People’s Republic of China

    Xiaomei Yang, Yuanyuan Li, Yiliang Wang, Yunguo Yang & Jianwei Hao

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  1. Xiaomei Yang
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  2. Yuanyuan Li
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  3. Yiliang Wang
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  4. Yunguo Yang
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  5. Jianwei Hao
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Correspondence to Jianwei Hao.

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Yang, X., Li, Y., Wang, Y. et al. Nitrocellulose-based hybrid materials with T7-POSS as a modifier: effective reinforcement for thermal stability, combustion safety, and mechanical properties. J Polym Res 24, 50 (2017). https://doi.org/10.1007/s10965-017-1203-x

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