FLAME-RETARDANT CHEMICAL MECHANISMS OF FLAME-RETARDANT VISCOSE FIBERSAND BLENDS WITH POLYESTER

A systematic investigation of structurally identical flame retardant v iscose, modal and polyester blended fabrics and fibres was carried out in order to develop a chemical basis for more effective products base d on organic and inorganic flame retardants. The oxygen indices and ch emical compositions of phosphorus-nitrogen flame retardants (P-N) were used in efficiency and synergy evaluations. A new flame retardant vis cose fibre containing silicid acid was included in the comparative eva luation procedure. Thermal gravimetry and X-ray diffractometry were us ed for determine physical factors during pyrolyzing of fibres. Charred residues were analyzed by applying elementary and solid 13-C NMR (CPM AS) spectrometry. The pyrolysis gas-liquid chromatographer connected w ith a gas phase FT infrared spectrometer was applied to identify the d ecomposition products of P-N-containing fabrics.