Preparation of submicrometer mesoporous iron-tin oxide hydroxide and its flame-retardant and smoke-suppressant properties on flexible poly(vinyl chloride)

摘要

A submicrometer mesoporous structured iron-tin oxide hydroxide [FeSnO(OH)(5)] was synthesized via a hydrothermal method and characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and the Brunauer-Emmett-Teller method. Blank poly(vinyl chloride) (PVC) and a flexible PVC treated with FeSnO(OH)(5) were investigated by limiting oxygen index (LOI) testing, cone calorimetry testing (CONE), tensile properties testing, and thermogravimetric analysis (TGA)-differential scanning calorimetry. The PVC sample treated with 5 phr FeSnO(OH)(5) (PVC5) showed the best integration properties among the studied samples. Compared with those of the untreated PVC sample, the LOI value of PVC5 increased 5.6%, and its tensile strength also improved; the average heat-release rate, average specific extinction area, and total smoke production of PVC5 decreased about 13.4, 28.0, and 48.8%, respectively. The char residue of PVC5 after CONE contained oxides and chlorides and was dense; this reduced the release of hydrogen chloride. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46218.