Kinetics of thermal degradation of viscose fiber and fire retardant viscose fiber

Abstract

The thermal decomposition behavior of fire retardant viscose fiber and viscose fiber were studied by thermogravimetric analysis (TGA) under air atmosphere at heating rates of 10, 20, 30 and 40oC/min. The activation energy and pre-exponential factor were calculated by using the Kissinger method, Flynn-Wall-Ozawa (FWO) method and Satava-Sestak method. The results show that the activation energy for the fire retardant viscose fiber calculated by Kissinger and FWO method was 102. 51kJ/mol and 103. 73kJ/mol, respectively. The activation energy for viscose fiber calculated by Kissinger and FWO method was 103. 58 kJ/mol and 104. 83kJ/mol, respectively. The kinetic mechanism function of fire retardant viscose fiber was G(α) = [(1+α)1/3-1]2 following a kinetic model of three-dimensional diffusion and the kinetic mechanism function of viscose fiber was G(α) = α3/2 following the power function rule.