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Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA

In this study, hydromagnesite, a rare natural hydrated alkaline magnesium carbonate, was used to synthesize magnesium hydroxide (MH) as a flame retardant for ethylene-vinyl acetate (EVA) to enhance its fire resistance and smoke suppression. Various concentrations of sodium hydroxide (NaOH) were used...

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Autores principales: Jiao, Ling-Li, Zhao, Peng-Cheng, Liu, Zhi-Qi, Wu, Qing-Shan, Yan, Dong-Qiang, Li, Yi-Lan, Chen, Yu-Nan, Li, Ji-Sheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030901/
https://www.ncbi.nlm.nih.gov/pubmed/35458317
http://dx.doi.org/10.3390/polym14081567
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author Jiao, Ling-Li
Zhao, Peng-Cheng
Liu, Zhi-Qi
Wu, Qing-Shan
Yan, Dong-Qiang
Li, Yi-Lan
Chen, Yu-Nan
Li, Ji-Sheng
author_facet Jiao, Ling-Li
Zhao, Peng-Cheng
Liu, Zhi-Qi
Wu, Qing-Shan
Yan, Dong-Qiang
Li, Yi-Lan
Chen, Yu-Nan
Li, Ji-Sheng
author_sort Jiao, Ling-Li
collection PubMed
description In this study, hydromagnesite, a rare natural hydrated alkaline magnesium carbonate, was used to synthesize magnesium hydroxide (MH) as a flame retardant for ethylene-vinyl acetate (EVA) to enhance its fire resistance and smoke suppression. Various concentrations of sodium hydroxide (NaOH) were used to alter the morphology and the flame-retardant efficiency of synthesized MH. EVA/MH composites were prepared through melt blending, and the influence of NaOH on the flame retardancy and mechanical properties was investigated by means of the limiting oxygen index (LOI), cone calorimeter test (CCT) and tensile test. The flame retardancy results demonstrated that composites exhibited remarkably improved flame retardant properties after introducing MH, reflected by an increase in the LOI value from 20% for neat EVA to roughly 38%. Additionally, the peak of heat release rate (pHRR), the total heat release (THR) and the peak of the smoke production rate for EVA3 were decreased by 37.6%, 20.7% and 44.4% compared with neat EVA, respectively. In the meantime, increasing char residues were also observed. The incorporation of different MH concentrations had a limited effect on the mechanical properties of the EVA/MH composites.
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spelling pubmed-90309012022-04-23 Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA Jiao, Ling-Li Zhao, Peng-Cheng Liu, Zhi-Qi Wu, Qing-Shan Yan, Dong-Qiang Li, Yi-Lan Chen, Yu-Nan Li, Ji-Sheng Polymers (Basel) Article In this study, hydromagnesite, a rare natural hydrated alkaline magnesium carbonate, was used to synthesize magnesium hydroxide (MH) as a flame retardant for ethylene-vinyl acetate (EVA) to enhance its fire resistance and smoke suppression. Various concentrations of sodium hydroxide (NaOH) were used to alter the morphology and the flame-retardant efficiency of synthesized MH. EVA/MH composites were prepared through melt blending, and the influence of NaOH on the flame retardancy and mechanical properties was investigated by means of the limiting oxygen index (LOI), cone calorimeter test (CCT) and tensile test. The flame retardancy results demonstrated that composites exhibited remarkably improved flame retardant properties after introducing MH, reflected by an increase in the LOI value from 20% for neat EVA to roughly 38%. Additionally, the peak of heat release rate (pHRR), the total heat release (THR) and the peak of the smoke production rate for EVA3 were decreased by 37.6%, 20.7% and 44.4% compared with neat EVA, respectively. In the meantime, increasing char residues were also observed. The incorporation of different MH concentrations had a limited effect on the mechanical properties of the EVA/MH composites. MDPI 2022-04-12 /pmc/articles/PMC9030901/ /pubmed/35458317 http://dx.doi.org/10.3390/polym14081567 Text en © 2022 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
Jiao, Ling-Li
Zhao, Peng-Cheng
Liu, Zhi-Qi
Wu, Qing-Shan
Yan, Dong-Qiang
Li, Yi-Lan
Chen, Yu-Nan
Li, Ji-Sheng
Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA
title Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA
title_full Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA
title_fullStr Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA
title_full_unstemmed Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA
title_short Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA
title_sort preparation of magnesium hydroxide flame retardant from hydromagnesite and enhance the flame retardant performance of eva
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9030901/
https://www.ncbi.nlm.nih.gov/pubmed/35458317
http://dx.doi.org/10.3390/polym14081567
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