Graphical abstract of the paper Rapid mass calorimeter as a high-throughput screening method for the development of flame-retarded TPU
Source: Paper A. Sut, E. Metzsch-Zilligen, M. Großhauser, R. Pfaendner, B. Schartel. Polym Test 74, 196–204, 2019
The thermal instability of the urethane bond results in easily flammable polyurethanes. Thus, the development of halogen-free flame retarded thermoplastic polyurethane (TPU) is an ambitious challenge. In the applied joint project with the LBF we proposed the Rapid Mass Calorimeter for accelerated assessment of the achieved flame retardancy. Comparing systematically varied sets of materials, applying different fire tests, and investigation of the pyrolysis with coupled thermo-analytical methods enable consistent description of the mechanisms and modes of action of the synergistic multicomponent systems. The characteristic two-step decomposition of TPU enhances the dripping in flammability testing, e.g. in the UL 94 burning chamber, and the formation of an intensive pool fire in the cone calorimeter. We determined the need to tackle the TPU-specific fire behaviour and to target the flame retardancy to the chosen fire test. In this research project, 68 compounds based on different flame retardancy approaches and applied in three different TPU materials (ether-based and ester-based, with different hardness) were investigated. For the interesting ternary system (aluminium diethylphosphinat, melamincyanurate and melamine polyphosphate), we varied the portion of the components and described the synergistic structure-property-relationship over the composition.
Acknowledgement:
Das IGF-Vorhaben 19078N der Forschungsvereinigung Forschungsgesellschaft Kunststoffe e.V., Haardtring 100 in 64295 Darmstadt, zum Thema „Schnelle Entwicklung von flammgeschützten Formulierungen für thermoplastische Polyurethane“ wurde über die AiF im Rahmen des Programms zur Förderung der industriellen Gemeinschaftsförderung und-entwicklung (IGF) vom Bundesministerium für Wirtschaft und Energie aufgrund eines Beschlusses des Deutschen Bundestages gefördert.
Rapid mass calorimeter as a high-throughput screening method for the development of flame-retarded TPU (open access)
A. Sut, E. Metzsch-Zilligen, M. Großhauser, R. Pfaendner, B. Schartel
published in Polymer Degradation and Stability, Volume 156, Pages 43-58, 2018
Synergy between melamine cyanurate, melamine polyphosphate and aluminum diethylphosphinate in flame retarded thermoplastic polyurethane (open access)
A. Sut, E. Metzsch-Zilligen, M. Großhauser, R. Pfaendner, B. Schartel
published in Polymer Testing, Volume 74, pages 196–204, 2019
BAM, Technical Properties of Polymeric Materials division