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Application of a Phosphazene Derivative as a Flame Retardant for Cotton Fabric using Conventional Method and Supercritical CO2

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Conventional pad-dry-cure (non-scCO2) and supercritical carbon dioxide (scCO2) application methods were used to study the effectiveness of a newly synthesized phosphazene derivative as a flame retardant on cotton fabric. The 1,1′,4,5-tetrahydrotrispiro[1,3,2-diazaphosphole-2,2′-[1,3,5,2,4,6]triazatriphosphinine-4′,6′′-dibenzo[d,f][1,3,2]dioxaphosphepine-6′,6′′′-dibenzo[d,f][1,3,2]dioxaphosphepine] (2), was synthesized in two steps, in high overall yield, and applied onto cotton fabrics. The flame retardant properties of the treated fabrics were examined by 45Ŷ angle flammability test, limiting oxygen index test (LOI), microscale combustion calorimetry (MCC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The results indicate that fabrics treated with 2 are flame resistant; however, non-scCO2 fabrics performed better than scCO2 fabrics in a preliminary durability study.
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Keywords: Cotton; Durability; Micro Combustion Calorimeter; Non-halogenated Flame Retardant; Supercritical Carbon Dioxide; Thermogravimetric Analysis

Document Type: Research Article

Publication date: November 1, 2014

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