Thermally Resistant, Self-Extinguishing Thermoplastic Composites Enabled by Tannin-Based Carbonaceous Particulate

André L. Missio*, Rafael A. Delucis, Caio Gomide Otoni, Pedro H.G. de Cademartori, Rodrigo Coldebella, Arthur B. Aramburu, Bruno D. Mattos, Marlon B.B. Rodrigues, Nayara Lunkes, Darci A. Gatto, Jalel Labidi

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Flame-resistant materials are key components in buildings and several other engineering applications. In this study, flame retardancy and thermal stability were conferred to a highly flammable technical thermoplastic—polypropylene (PP)—upon compositing with a carbonaceous tannin-based particulate (CTP). Herein, we report on a straightforward, facile, and green approach to prepare self-extinguishing thermoplastic composites by thermoblending highly recalcitrant particulate. The thermal stability and mechanical properties of the composites are tethered to the CTP content. We demonstrate that the addition of up to 65 wt% of CTP improved the viscoelastic properties and hydrophobicity of the PP, whereas having marginal effects on bulk water interactions. Most importantly, compositing with CTP remarkably improved the thermal stability of the composites, especially over 300 °C, which is an important threshold associated with the combustion of volatiles. PP-CTP composites demonstrated great capacity to limit and stop fire propagation. Therefore, we offer an innovative route towards thermally resistant and self-extinguishing PP composites, which is enabled by sustainable tannin-based flame retardants capable of further broadening the technical range of commodity polyolefins to high temperature scenarios.

Original languageEnglish
Article number3743
Number of pages13
JournalPolymers
Volume14
Issue number18
DOIs
Publication statusPublished - Sep 2022
MoE publication typeA1 Journal article-refereed

Keywords

  • bioeconomy
  • building materials
  • engineering components
  • flame-resistant materials
  • polypropylene
  • tannin foams

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