Metallurgical solid waste modified thermoplastic polyurethane composites: The thermal stability and combustion properties

Abstract

As a kind of bulk industrial solid waste, the massive accumulation of iron tailings has caused serious waste of resources and environmental pollution. In this study, a silane coupling agent (KH550) was used to modify the surface of iron tailings to produce MIT, and it was compounded with ammonium polyphosphate (APP) on thermoplastic polyurethane (TPU) to prepare a series of TPU/APP/MIT composites. Thermogravimetric (TG), cone calorimetric (CCT), thermogravimetric infrared, scanning electron microscopy, and Raman techniques were also used to analyze the combustion performance, smoke toxicity, and microscopic morphology. The TG test results showed that the compounding of APP and MIT significantly improved the residual carbon value of TPU composites at 700 C. CCT test results showed that the TPU/APP/MIT composites exhibited excellent flame retardancy and smoke suppression. Compared with pure TPU, PHRR, THR, and TSR of TPU/APP15/MIT10 composite decreased by 85.56%, 87.83%, and 86.17%, respectively, the peak release rates of CO and CO 2 decreased by 69.26% and 90.34%, respectively. The above studies showed that APP and MIT have excellent flame retardant and smoke suppression effect on TPU materials, providing more opportunities for the study of TPU composites and metallurgical solid waste utilization.

High erosion resistance thermoplastic polyurethanes composites fabricated via intercalation reinforced interfacial interaction

“…Thermoplastic polyurethanes (TPU) possess outstanding tensile strength, modulus and erosion resistance owing to its alternating hard segments and soft segments structure 1–4 . However, the major defect of TPU hinders their application because of the poor thermal stability 5–8 . Therefore, it is important to enhance the thermal stability of TPU and meanwhile maintain its high mechanical property.…”