The influence of phosphorus- and nitrogen- containing groups on the thermal stability and combustion characteristics of styrenic polymers

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Baby, Aloshy, Tretsiakova-McNally, Svetlana ORCID: 0000-0002-1012-0597 (external link), Joseph, Paul ORCID: 0000-0002-5503-9979 (external link), Arun, Malavika ORCID: 0000-0001-9996-9070 (external link), Zhang, Jianping and Pospiech, Doris (2022) The influence of phosphorus- and nitrogen- containing groups on the thermal stability and combustion characteristics of styrenic polymers. Journal of Thermal Analysis and Calorimetry, 148 (2). pp. 229-241. ISSN 1388-6150

Abstract

The effects of covalently bound phosphorus (P-) and nitrogen (N-) bearing groups on the thermal and combustion attributes of polystyrene have been investigated. The necessary chemical modifications were achieved through co- and ter-polymerisation reactions, in a suitable solvent, under radical initiation conditions. The influence of P–N cooperative interactions on the combustion properties of styrenic polymers was studied. The co-monomers of interest included: diethyl(acryloyloxymethyl)phosphonate (DEAMP), diethyl-p-vinylbenzylphosphonate (DEpVBP), acrylic acid-2-[(diethoxyphosphoryl)methyl amino]ethyl ester (ADEPMAE) and maleimide (MI). For the first time, the ter-polymers of styrene containing both P- groups, DEAMP or DEpVBP, and N- groups, MI, were prepared via solution polymerisation. It was found that the thermal stability and combustion characteristics of polystyrene were significantly altered by the presence of nominal amounts of P- and N- containing groups, and, in certain cases, cooperative interactions of these groups were also evident. For instance, the extents of char formation post-degradation of the prepared ter-polymers, as revealed by thermogravimetric investigations in an inert atmosphere (nitrogen), were found to be enhanced by more than 20%, as compared to the unmodified polystyrene. The heat release rates and heat release capacities of the ter-polymers, as measured using the pyrolysis combustion flow calorimetric (PCFC) technique, were reduced by almost 50% in comparison to the same parameters obtained for the unmodified counterpart.

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Item type Article
URI https://vuir.vu.edu.au/id/eprint/46094
DOI 10.1007/s10973-022-11404-6 (external link)
Official URL https://link.springer.com/article/10.1007/s10973-0... (external link)
Subjects Current > FOR (2020) Classification > 4004 Chemical engineering
Current > Division/Research > Institute for Sustainable Industries and Liveable Cities
Keywords combustion, thermal stability, phosphorous, nitrogen, combustion properties
Citations in Scopus 1 - View on Scopus (external link)
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