Title: FROM GREEN TO GREENER FIRE RETARDED BIOBASED POLYMERS
Abstract: The biobased polymer market is intensively growing and the use of biobased polymer is turning from short life applications to durable ones, thus for some applications (e.g. E&E) the fire properties of these polymers need to be improved. In this context, the flame retardancy of three different biobased polymers, i.e. polybutadiene succinate (PBS), polyether-polyamide-block copolymer (PEBAX) and Poly(lactic acid) (PLA) was investigated using conventional and biobased flame retardants. In all cases, the fire properties of the polymers were improved. PBS formulation based on ammonium polyphosphate (APP) and Melamine (ratio 5/1 and 30 wt-% loading) presents a Limiting Oxygen Index (LOI) of 36 vol-%. In the case of PEBAX, a LOI value of 37 vol-% can be obtained with aluminum phosphinate (OP1230) loaded at 20 wt-%. The PLA formulations were based on APP and starches containing different ratios of amylose:amylopectin. All formulations containing 60 wt-% PLA, 30 wt-% APP and 10 wt-% starch exhibit good fire properties. No real influence of starch composition was noticed. The best results were obtained for rice starch with a decrease of 56 % of pHRR and a LOI of 48 vol-%.
Authors: Gaelle Fontaine, Mathilde Casetta, Sophie Duquesne, Serge Bourbigot
Conference: CAMX 2017 –Orlando