Adaptation of Pyrolytic Conduit of Polyester Cotton Blended Fabric with Flame Retardant Chemical Concentrations

Thermal degradation of polyester – cotton blended fabric material was analysed after addition of phosphorous based flame retardant chemical at different concentration levels viz., 50GPL, 150GPL, 250GPL, 300GPL and 350GPL. The thermogravimetric curve of control sample showed two steps of degradations with two major onset points. A step wise and progressive budging in thermal degradation kinetics with increase in concentration level was observed for this material. The thermal degradation onset point was progressively shoved to lower temperature with increase in chemical concentration. Two step mass loss observed in control sample was modified to be in three steps in treated samples. The mass loss curve progressively became flat with increasing chemical concentration in the sample. As a result of chemical application, an additional endotherm was emerged near 200 O C. The depth of this endotherm increased with increasing chemical concentration. Mass loss was also analysed in three different temperature intervals. The mass loss in first and third temperature interval increased from 9% (control) to 24% (350GPL) and 11% (control) to 39% (350GPL) respectively as the concentration increased. Also, the mass loss decreased from 70.9 % in control to 35 % for 350GPL treatment implying that the less amount of mass was decomposed due to non accessibility of free oxygen. There observed a drastic decrease in exotherm energy with minor shifting in peak point after the treatment. The activation energy was observed to be progressively decreasing from 267.6kJ/mole for control to 140.3 kJ/mole for sample of 350GPL treatment.