Thermal Decomposition Kinetics of Flame Retardant Polybutylene Terephthalate Matrix Composites

Abstract:

The thermal decomposition kinetics of polybutylene terephthalate (PBT) and flame-retardant PBT (FR-PBT) were investigated by thermogravimetric analysis at various heating rates. The kinetic parameters were determined by using Kissinger, Flynn-Wall-Ozawa and Friedman methods. The y (α) and z (α) master plots were used to identify the thermal decomposition model. The results show that the rate of residual carbon of FR-PBT is higher than that of PBT and the maximum mass loss rate of FR-PBT is lower than that of PBT. The values of activation energy of PBT (208.71 kJ/mol) and FR-PBT (244.78 kJ/mol) calculated by Kissinger method were higher than those of PBT (PBT: 195.54 kJ/mol) and FR-PBT (FR-PBT: 196.00 kJ/mol) calculated by Flynn-Wall-Ozawa method and those of PBT and FR-PBT (PBT: 199.10 kJ/mol, FR-PBT: 206.03 kJ/mol) calculated by Friedman methods. There is a common thing that the values of activation energy of FR-PBT are higher than that of PBT in different methods. The thermal decomposition reaction models of the PBT and FR-PBT can be described by Avarami-Erofeyev model (A₁).

• Periodical: Materials Science Forum (Volume 956)
• Pages: 181-191
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.956.181
• Online since: June 2019
• Authors: Jian Lin Xu*, Bing Xue Ma, Cheng Hu Kang, Cheng Cheng Xu, Zhou Chen, Yong Gang Lin
• Keywords: Flame Retardant, Kinetics, Polybutylene Terephthalate (PBT), Thermal Decomposition

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