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Eco-friendly fully bio-based polybenzoxazine-silica hybrid materials by sol–gel approach

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Abstract

In the present work, a high thermal and flame-retardant polybenzoxazine-silica hybrid material has been synthesized using renewable raw materials (including eugenol and furfurylamine) via a greener sol–gel-based approach. Inorganic component tetraethoxysilane (TEOS) was introduced into eugenol benzoxazine (BZ–E–F) with the help of (3-mercaptopropyl) trimethoxysilane (MPTMS) as a coupling agent viz thiol-ene click approach among the mercapto group (–SH) of MPTMS and allyl functional group in the eugenol. The developed BZ–E–F monomer and PBZ–E–F hybrids are characterized to check the molecular structures, curing behaviour, thermal stability and flame-retardant properties. The thermal studies reveal that the char yield increases to 67.54 from 41.32 and LOI increased to 44.52 from 34.03 for PBZ–E–F silica hybrid. The thermal and flame-resistant studies strongly suggest that the prepared sustainable and eco-friendly PBZ silica hybrid can be used to replace the petroleum-based polymeric materials for better thermal and flame-resistant applications.

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Authors and Affiliations

  1. Polymer Composites Lab, Division of Chemistry, Department of Sciences and Humanities, Vignan’s Foundation for Science, Technology and Research (VFSTR), Vadlamudi, Guntur, 522 213, India

    S. Devaraju, K. Krishnadevi & E. Naveena

  2. Centre of Excellence for Advanced Materials, Manufacturing, Processing and Characterization (CoExAMMPC), Vignan’s Foundation for Science, Technology and Research (VFSTR), Vadlamudi, Guntur, 522 213, India

    M. Alagar

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  1. S. Devaraju
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  2. K. Krishnadevi
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  3. E. Naveena
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  4. M. Alagar
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Correspondence to S. Devaraju or M. Alagar.

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Devaraju, S., Krishnadevi, K., Naveena, E. et al. Eco-friendly fully bio-based polybenzoxazine-silica hybrid materials by sol–gel approach. Polym. Bull. 78, 4251–4260 (2021). https://doi.org/10.1007/s00289-020-03309-x

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  • DOI: https://doi.org/10.1007/s00289-020-03309-x

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