Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites
Combustion and thermo-oxidative properties of polyamide 6 (PA6)/montmorillonite (MMT) clay nanocomposites are studied with emphasis on the catalytic role of metal ions (Mg2+, Al3+ and Fe3+) present in MMT. Each metal ion uniquely influences condensed phase reactions (mechanism and/or kinetics) depen...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/83309 http://hdl.handle.net/10220/42548 |
| _version_ | 1826127335131185152 |
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| author | Zope, Indraneel Suhas Dasari, Aravind Guan, Fanglan Yu, Zhong-Zhen |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Zope, Indraneel Suhas Dasari, Aravind Guan, Fanglan Yu, Zhong-Zhen |
| author_sort | Zope, Indraneel Suhas |
| collection | NTU |
| description | Combustion and thermo-oxidative properties of polyamide 6 (PA6)/montmorillonite (MMT) clay nanocomposites are studied with emphasis on the catalytic role of metal ions (Mg2+, Al3+ and Fe3+) present in MMT. Each metal ion uniquely influences condensed phase reactions (mechanism and/or kinetics) depending on its concentration in metal ion exchanged MMT, its ability to form metal-organic complexes, and confinement effect as determined by eventual dispersion of MMT in the matrix. Presence of Al3+ accelerated kinetics of PA6 decomposition during initial stages, Mg2+ rich composite displayed good thermo-oxidation stability and char yield, and Fe3+ prominently altered the chemical composition of condensed phase ultimately producing highest amount of smoke. Possible PA6 decomposition reaction mechanisms have been identified that are susceptible to metal ion catalysis in the presence of oxygen. These results provide important progress towards the understanding of widely reported yet poorly understood phenomena of catalyzing effect of clay during the combustion of polymer. The results are a definite step towards the realization of stand-alone clay based nanocomposites with superior fire retardancy. |
| first_indexed | 2024-10-01T07:07:12Z |
| format | Journal Article |
| id | ntu-10356/83309 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:07:12Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/833092023-07-14T15:50:57Z Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites Zope, Indraneel Suhas Dasari, Aravind Guan, Fanglan Yu, Zhong-Zhen School of Materials Science & Engineering Catalysis Thermo-oxidation Combustion and thermo-oxidative properties of polyamide 6 (PA6)/montmorillonite (MMT) clay nanocomposites are studied with emphasis on the catalytic role of metal ions (Mg2+, Al3+ and Fe3+) present in MMT. Each metal ion uniquely influences condensed phase reactions (mechanism and/or kinetics) depending on its concentration in metal ion exchanged MMT, its ability to form metal-organic complexes, and confinement effect as determined by eventual dispersion of MMT in the matrix. Presence of Al3+ accelerated kinetics of PA6 decomposition during initial stages, Mg2+ rich composite displayed good thermo-oxidation stability and char yield, and Fe3+ prominently altered the chemical composition of condensed phase ultimately producing highest amount of smoke. Possible PA6 decomposition reaction mechanisms have been identified that are susceptible to metal ion catalysis in the presence of oxygen. These results provide important progress towards the understanding of widely reported yet poorly understood phenomena of catalyzing effect of clay during the combustion of polymer. The results are a definite step towards the realization of stand-alone clay based nanocomposites with superior fire retardancy. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2017-06-01T04:36:48Z 2019-12-06T15:19:42Z 2017-06-01T04:36:48Z 2019-12-06T15:19:42Z 2016 2016 Journal Article Zope, I. S., Dasari, A., Guan, F., & Yu, Z.-Z. (2016). Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites. Polymer, 92, 102-113. 0032-3861 https://hdl.handle.net/10356/83309 http://hdl.handle.net/10220/42548 10.1016/j.polymer.2016.03.087 201181 en Polymer © 2016 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Polymer, Elsevier Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [https://doi.org/10.1016/j.polymer.2016.03.087]. 45 p. application/pdf |
| spellingShingle | Catalysis Thermo-oxidation Zope, Indraneel Suhas Dasari, Aravind Guan, Fanglan Yu, Zhong-Zhen Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites |
| title | Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites |
| title_full | Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites |
| title_fullStr | Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites |
| title_full_unstemmed | Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites |
| title_short | Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites |
| title_sort | influence of metal ions on thermo oxidative stability and combustion response of polyamide 6 clay nanocomposites |
| topic | Catalysis Thermo-oxidation |
| url | https://hdl.handle.net/10356/83309 http://hdl.handle.net/10220/42548 |
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