Enhanced flame retardancy of rigid polyurethane foam via iron tailings and expandable graphite
Source abstract
Abstract
To explore the potential application of industrial waste, iron tailings powder, which is in combination with expandable graphite (EG), was adopted to improve the flame retardancy of rigid polyurethane foam (RPUF). The flame retardant performance, combustion performance, and gas products of composites were investigated. The flame retardant test indicated that 20 wt% MITS/EG increased the limiting oxygen index value of RPUF/MITS/EG composite to 23.3–26.6 vol% and passed the V-0. Thermogravimetric analysis test confirmed that MITS/EG improved the overall thermal stability of RPUF-4, and the residual char rate at 700 °C was increased to 35.76 wt%. The peak of heat release rate, total smoke release, and smoke factor of RPUF-4 were reduced by 61.55, 77.99, and 91.54%, respectively, compared with the pure sample, which significantly improved the fire safety of RPUF. Thermogravimetric–Fourier transform infrared spectrometer test implied that MITS/EG system reduced the release intensity of CO2, isocyanate compounds, and HCN in the composites. Scanning electron microscopy, Raman, and X-ray diffraction tests showed that MITS/EG promoted RPUF to form a heat-resistant and dense expanded char layer.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Flame retardant materials and properties · Fire dynamics and safety research · Environmental and Industrial Safety
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
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