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Title: Influence of metal ions on thermo-oxidative stability and combustion response of polyamide 6/clay nanocomposites
Authors: Zope, Indraneel Suhas
Dasari, Aravind
Guan, Fanglan
Yu, Zhong-Zhen
Keywords: Catalysis
Issue Date: 2016
Source: 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.
Series/Report no.: Polymer
Abstract: 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.
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2016.03.087
Schools: School of Materials Science & Engineering 
Rights: © 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: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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