【摘 要】
：
Considerable smoke and toxic volatiles generation has compromised the application of thermoplastic polyurethane (TPU) and caused a great threat to human life.Here,nano-MgFe layered double hydroxide (MgFe-LDH) with uniform particle size was synthesized to
【机 构】
：
State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beij
论文部分内容阅读
Considerable smoke and toxic volatiles generation has compromised the application of thermoplastic polyurethane (TPU) and caused a great threat to human life.Here,nano-MgFe layered double hydroxide (MgFe-LDH) with uniform particle size was synthesized to reduce smoke density and toxic gases of TPU composites using ammonium polyphosphate (APP) as a flame retardant agent.The results show that the combination of 16 wt.％ APP and 4 wt.％ MgFe-LDH greatly decreased the smoke density (D20min and Ds,max),smoke production rate (SPR) and heat release rate (HRR) of TPU composites.Furthermore,the MgFe-LDH synergist demonstrated high efficiency in decreasing total volatiled products and toxic volatiles evolved,such as the CO,HCN and isocyanates.The reason was mainly attributed to the chemical reaction between MgFe-LDH and APP,which can promote the compactness of char layers with fine microstructure formed in the decomposition process of MgFe-LDH/APP/TPU composites.The protective char layers could act as barriers between combustion zone and matrix to protect the unburned substrate and promote smoke suppression effect.
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