Abstract
Microscopical examinations of charred substances are means of studying and interpreting the events of pyrolysis. How pyrolysis is retarded by certain finishes for textiles is of current interest. This paper describes the charring of cotton/polyester blended fabrics and interprets the sequential physical events that occur during pyrolysis. A cotton/polyester blend fabric treated with aqueous emulsions of tetrakis(hydroxymethyl)phosphonium chloride urea, trimethylolmethylglycoluril and poly(vinyl bromide) was the model for investigation. Charred surfaces from fabrics treated with other flameretardant agents have been described elsewhere.
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