Posted on 29/11/2018 in 2018
Study says PIN FRs reduce smoke toxicity of TPU

Thirteen different combinations of thermoplastic polyurethane (TPU) with and without PIN flame retardants were tested for emission of toxic gases during thermal degradation / combustion in nitrogen and in air (TG-FTIR, static tube furnace and steady-state tube furnace). The PIN flame retardants tested were ammonium polyphosphate (APP), aluminium hydroxide (ATH) and nano-montmorillonite (MMT) in varying combinations and loadings up to 12% total. Smoke toxicity estimated by FED (fractional effective dose) was calculated based on concentrations of CO, CO2 and HCN. Over 50% of toxicity was due to HCN. Smoke toxicity, as calculated by this method, was reduced in TPU containing APP-ATH and APP-ATH-MMT.

“Comparative study of toxicity for thermoplastic polyurethane and its flame retardant composites”, C. Liu et al., J. Thermoplastic Materials 1-15, 2018

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