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How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?

This work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized...

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Detalles Bibliográficos
Autores principales: Zhao, Siheng, Xu, Bo, Shan, Hao, Zhang, Qinglei, Wang, Xiangdong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10146855/
https://www.ncbi.nlm.nih.gov/pubmed/37112063
http://dx.doi.org/10.3390/polym15081917
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author Zhao, Siheng
Xu, Bo
Shan, Hao
Zhang, Qinglei
Wang, Xiangdong
author_facet Zhao, Siheng
Xu, Bo
Shan, Hao
Zhang, Qinglei
Wang, Xiangdong
author_sort Zhao, Siheng
collection PubMed
description This work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized. The combustion behaviors of flame-retardant PET were studied and the structure–property relationships between the phosphorus-based structures with different valence states and flame-retardant properties were further explored. It was found that phosphorus valence states significantly affected the flame-retardant modes of action of polyphosphate in PET. For the phosphorus structures with +3-valence, more phosphorus-containing fragments were released in the gas phase, inhibiting polymer chain decomposition reactions; by contrast, those with +5-valence phosphorus retained more P in the condensed phase, promoting the formation of more P-rich char layers. It is worth noting that the polyphosphate containing both +3/+5-valence phosphorous tended to combine the advantage of phosphorus structures with two valence states and balance the flame-retardant effect in the gas phase and condensed phase. These results contribute to guiding the design of specified phosphorus-based structures of flame-retardant compounds in polymer materials.
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spelling pubmed-101468552023-04-29 How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET? Zhao, Siheng Xu, Bo Shan, Hao Zhang, Qinglei Wang, Xiangdong Polymers (Basel) Article This work investigated the effect of different valence states of phosphorus-containing compounds on thermal decomposition and flame retardancy of polyethylene terephthalate (PET). Three polyphosphates—PBPP with +3-valence P, PBDP with +5-valence P and PBPDP with both +3/+5-valence P—were synthesized. The combustion behaviors of flame-retardant PET were studied and the structure–property relationships between the phosphorus-based structures with different valence states and flame-retardant properties were further explored. It was found that phosphorus valence states significantly affected the flame-retardant modes of action of polyphosphate in PET. For the phosphorus structures with +3-valence, more phosphorus-containing fragments were released in the gas phase, inhibiting polymer chain decomposition reactions; by contrast, those with +5-valence phosphorus retained more P in the condensed phase, promoting the formation of more P-rich char layers. It is worth noting that the polyphosphate containing both +3/+5-valence phosphorous tended to combine the advantage of phosphorus structures with two valence states and balance the flame-retardant effect in the gas phase and condensed phase. These results contribute to guiding the design of specified phosphorus-based structures of flame-retardant compounds in polymer materials. MDPI 2023-04-17 /pmc/articles/PMC10146855/ /pubmed/37112063 http://dx.doi.org/10.3390/polym15081917 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Siheng
Xu, Bo
Shan, Hao
Zhang, Qinglei
Wang, Xiangdong
How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
title How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
title_full How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
title_fullStr How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
title_full_unstemmed How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
title_short How Do Phosphorus Compounds with Different Valence States Affect the Flame Retardancy of PET?
title_sort how do phosphorus compounds with different valence states affect the flame retardancy of pet?
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10146855/
https://www.ncbi.nlm.nih.gov/pubmed/37112063
http://dx.doi.org/10.3390/polym15081917
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