Study on the thermal stability of wool treated with flame-retardant reagents

• Published in: Thermochimica acta Vol. 284; no. 2; pp. 435 - 439
• Main Authors: Tian, C.M., Shi, Z.H., Zhang, H.Y., Xu, J.Z., Shi, J.R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.1996; Elsevier Science
• Subjects: Applied sciences; DTA; Exact sciences and technology; Flame-retardant; Natural polymers; Physicochemistry of polymers; Proteins; Pyrolysis; Thermal degradation; Wool; DTA; Flame-retardant; Pyrolysis; Wool; TA; Thermal degradation; Thermal properties; Ammonium compound; Dihydrogenphosphates; Thermooxidative degradation; Flame retardant; Zinc compound; Kinetics; Experimental study; Activation energy; Oxygen index; Comparative study
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/0040-6031(96)02839-0

The thermal degradation of wool treated with flame-retardant reagents synthesized in our laboratory, namely, (NH 4) 3H 2PO 4 [Al(H 2PO 4) 5], (NH 4) 3Cl[Ca(H 2PO 4) 4], (NH 4) 3Cl [Mg(H 2PO 4) 4], (NH 4) 3H 2PO 4[Zn(H 2PO 4) 4], K(NH 4) 2Cl[Zn(H 2PO 4) 4], Na 3Cl[Zn(H 2PO 4) 4] and H 3PO 4[Zn(H 2PO 4) 2] was studied by thermal analysis, infrared spectroscopy and by measurement of the limiting oxygen index (LOI). The kinetic parameters were obtained using the equations of Brodio and Kissinger. The activation energies were calculated for the decomposition of untreated wool and wool treated with flame-retardant reagents. Experimental data showed that for the wool treated with flame-retardant reagents there were increases in char yield and LOI, and decreases in the activation energy and the temperature of decomposition.