Abstract:Phosphorus/nitrogen flame retardant ammonium three phosphoric acid glycerol ester (FR) with reactive -P-O−NH4+ groups was synthesized from glycerol, phosphoric acid and urea. At high temperature, the -P-O−NH4+ group in FR is decomposed into -P-O−H+ group. Under the action of catalyst dicyandiamide, -P-O −H+ forms phosphonic anhydride. Phosphonic anhydride can dehydrate and condense with the hydroxyl group on the 6-position carbon atom in the glucose ring of cotton fiber, forming a firm P-O-C bond, thus fixing F… Show more
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