Thermal degradation and flame retardancy of nylon 6/aluminum methylmethoxy phosphonate composites

Thermal degradation and flame retardancy of nylon 6/aluminum methylmethoxy phosphonate composites

An aluminum methylmethoxyphosphonate (AlPo)-based flame retardant (FR) was synthesized. Thermal degradation and flame retardancy of nylon 6 (PA6)/AlPo composites were examined and compared with PA6/commercial aluminum diethylphosphinate (AlPi) composites. The PA6/AlPo composite achieved a V-0 rating...

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Bibliographic Details
Published in:RSC advances Vol. 13; no. 8; pp. 5219 - 5227
Main Authors: Vothi, Hai, Kim, Chowon, Nguyen, TanBinh, Lee, Jinwoo, Nguyen, Lan-Anh T, Suhr, Jonghwan
Format: Journal Article
Language:English
Published: England Royal Society of Chemistry 06-02-2023
The Royal Society of Chemistry
Subjects:
Aluminum
Chemistry
Combustion
Composite materials
Flame retardants
Fourier transforms
Infrared analysis
Infrared spectroscopy
Nylon 6
Phosphonates
Thermal degradation
Thermogravimetric analysis
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Summary:An aluminum methylmethoxyphosphonate (AlPo)-based flame retardant (FR) was synthesized. Thermal degradation and flame retardancy of nylon 6 (PA6)/AlPo composites were examined and compared with PA6/commercial aluminum diethylphosphinate (AlPi) composites. The PA6/AlPo composite achieved a V-0 rating at 20 wt% loading during the UL-94 test, and it exhibited the formation of a charred layer that protected the polymer from burning and reduced the release of gases during the combustion of PA6. AlPo demonstrated exceptional performance in gaseous and condensed phases in the PA6 matrix, whereas AlPi only worked in the gaseous phase. The differences between the thermal degradation mechanisms and flame retardancies of AlPi and AlPo were investigated via Fourier-transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and cone calorimetry. A suitable degradation mechanism was proposed to aid the development of flame retardants in the future. Synthesis scheme of aluminum methylmethoxyphosphonate (AlPo).
Bibliography:Electronic supplementary information (ESI) available. See DOI
https://doi.org/10.1039/d2ra07297a
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra07297a