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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MDPI AG
2022-04-01
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author | Ling-Li Jiao Peng-Cheng Zhao Zhi-Qi Liu Qing-Shan Wu Dong-Qiang Yan Yi-Lan Li Yu-Nan Chen Ji-Sheng Li |
author_facet | Ling-Li Jiao Peng-Cheng Zhao Zhi-Qi Liu Qing-Shan Wu Dong-Qiang Yan Yi-Lan Li Yu-Nan Chen Ji-Sheng Li |
author_sort | Ling-Li Jiao |
collection | DOAJ |
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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issn | 2073-4360 |
language | English |
last_indexed | 2024-03-09T04:17:10Z |
publishDate | 2022-04-01 |
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series | Polymers |
spelling | doaj.art-9134aa5320be4d0a926781aec0c969992023-12-03T13:52:34ZengMDPI AGPolymers2073-43602022-04-01148156710.3390/polym14081567Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVALing-Li Jiao0Peng-Cheng Zhao1Zhi-Qi Liu2Qing-Shan Wu3Dong-Qiang Yan4Yi-Lan Li5Yu-Nan Chen6Ji-Sheng Li7School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, ChinaGreen Industry Innovation Research Institute, Anhui University, Hefei 230039, ChinaSchool of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, ChinaSchool of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, ChinaSchool of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, ChinaSchool of Chemistry and Materials Science, Anhui Normal University, Wuhu 230022, ChinaSchool of Chemical Engineering and Materials, Tianjin University of Science and Technology, Tianjin 300457, ChinaQinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, ChinaIn 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.https://www.mdpi.com/2073-4360/14/8/1567hydromagnesiteethylene-vinyl acetatemagnesium hydroxideflame retardancymechanical properties |
spellingShingle | Ling-Li Jiao Peng-Cheng Zhao Zhi-Qi Liu Qing-Shan Wu Dong-Qiang Yan Yi-Lan Li Yu-Nan Chen Ji-Sheng Li Preparation of Magnesium Hydroxide Flame Retardant from Hydromagnesite and Enhance the Flame Retardant Performance of EVA Polymers hydromagnesite ethylene-vinyl acetate magnesium hydroxide flame retardancy mechanical properties |
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 | hydromagnesite ethylene-vinyl acetate magnesium hydroxide flame retardancy mechanical properties |
url | https://www.mdpi.com/2073-4360/14/8/1567 |
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