Published : 2021-01-13

Injection molding of transparent polymeric materials with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide forenhanced fire retardancy

Abstract

Selected transparent polymers [i.e., polystyrene (PS) and poly(methyl methacrylate) (PMMA)] were extruded with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). The obtained compositions were formed into testing samples by injection molding process. The obtained materials (containing 1–10 wt parts/100 wt parts of the polymer) exhibited higher melt flow rate and thermal resistance, as well as reduced flammability (while maintaining their mechanical properties). Additionally, Fourier transform infrared spectroscopy (FT-IR) analysis of modified polymers was conducted. Studies confirmed that – during the extrusion and/or injection molding – DOPO reacts with PS and PMMA.


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Ubowska, A., Kowalczyk, K., & Krala, G. (2021). Injection molding of transparent polymeric materials with 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide forenhanced fire retardancy. Polimery, 63(7-8), 536–541. https://doi.org/10.14314/polimery.2018.7.8