Arun Malavika, Bigger Stephen, Guerrieri Maurice, Joseph Paul, Tretsiakova-McNally Svetlana
Institute of Sustainable Industries and Liveable Cities, Victoria University, P.O. Box 14428, Melbourne, VIC 8001, Australia.
Belfast School of Architecture and the Built Environment, Ulster University, Newtownabbey BT37 0QB, UK.
Polymers (Basel). 2022 Apr 1;14(7):1447. doi: 10.3390/polym14071447.
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.
本文报道了聚甲基丙烯酸甲酯基聚合物的热学和量热学表征。改性基团在各种化学环境中引入了磷原子，包括氧化态为III或V的情况。采用了添加和反应两种策略，在所有情况下磷的负载量均保持在2 wt%。通过本体聚合路线获得的片材，接受了各种光谱、热学和燃烧技术的检测。结果表明，不同的改性基团表现出不同性质、程度和燃烧行为模式，在某些情况下还包括添加甚至拮抗作用。对于共价键合的膦酸酯基团，侧酯部分的早期裂解显示会产生磷酸物种，进而可在凝聚相中起作用。对于添加剂，如膦和氧化膦，可以假定有限的气相抑制作用在起作用。
