Thermal and Calorimetric Investigations of Some Phosphorus-Modified Chain Growth Polymers 1: Polymethyl Methacrylate

Malavika Arun, Stephen Bigger, Maurice Guerrieri, Paul Joseph, Svetlana Tretsiakova-McNally

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Abstract

The thermal and calorimetric characterizations of polymethyl methacrylate-based polymers are reported in this paper. The modifying groups incorporated the phosphorus atom in various chemical environments, including oxidation states of III, or V. Both additive and reactive strategies were employed, where the loading of phosphorus was kept at 2 wt% in all cases. The plaques, obtained through the bulk polymerization route, were subjected to a variety of spectroscopic, thermal and combustion techniques. The results showed that the different modifying groups exerted varying nature, degrees and modes of combustion behaviors, which also included in some cases an additive, and even an antagonistic effect. In the case of covalently-bound phosphonate groups, early cracking of the pendent ester moieties was shown to produce phosphoric acid species, which in turn can act in the condensed phase. For the additives, such as phosphine and phosphine oxide, limited vapor-phase inhibition can be assumed to be operative.
Original languageEnglish
Article number1447
Number of pages16
JournalPolymers
Volume14
Issue number7
Early online date1 Apr 2022
DOIs
Publication statusE-pub ahead of print - 1 Apr 2022

Bibliographical note

This research received no external funding.

Keywords

  • Polymethyl methacrylate
  • phosphorus-containing groups
  • additive and reactive routes
  • thermal degradation
  • calorimetric evaluations

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