Work

Novel aromatic phosphonates as flame retardants for polybutylene succinate

Year: 2025

Type: article

Abstract: • Thermally stable aromatic phosphonates as efficient flame retardants. • Lower proportion of flame retardants required due to synergism. • Improved flame retardancy by incorporation of aldehyde groups. Novel potential phosphonate flame retardants were synthesized from renewable building blocks. The additives were characterized using thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC) and nuclear magnetic resonance spectroscopy (NMR). Polybutylene succinate was compounded and injection molded with phosphonate concentrations of 2–10 wt. % and tested via UL-94 resulting in a shortening of burning time and reduction of burning droplets. Furthermore, synergistic combinations of the novel phosphonates with 2,5-dioxopyrrolidin-1-yl 2,4,6-trimethylbenzenesulfonate were investigated. Best results were achieved with phosphonates where the aromatic ring is substituted with aldehyde groups and the additional use of the sulfonate. TGA and NMR analysis provided indications of the involved flame retardant mechanism.

Source: Polymer Degradation and Stability

DOI: 10.1016/j.polymdegradstab.2025.111369

Authors: Thomas Driever, Elke Metzsch-Zilligen, Rudolf Pfaendner

Institution: Fraunhofer Institute for Structural Durability and System Reliability

Language: English

Topic: Flame retardant materials and properties

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,190

Funders: Fonds National de la Recherche Luxembourg, Fraunhofer-Gesellschaft, Fachagentur Nachwachsende Rohstoffe