Thermal kinetic parameter analysis by series of thermogravimetry experiments with varied sample mass for scale-up applications

• Published in: Journal of thermal analysis and calorimetry 2022-09, Vol.147 (17), p.9737-9746
• Main Authors: Xie, Qiyuan, Chen, Hong, Yang, Ye, Ding, Yanwei, Yuan, Yanhua
• Format: Article
• Language: English
• Subjects: Activation energy; Analytical Chemistry; Chemistry; Chemistry and Materials Science; Experiments; Inorganic Chemistry; Mathematical models; Measurement Science and Instrumentation; Modelling; Oxidation; Parameters; Physical Chemistry; Polymer Sciences; Pyrolysis; Thermal analysis; Thermogravimetry
• ISSN: 1388-6150; 1588-2926
• DOI: 10.1007/s10973-022-11232-8

The objective of this work is to evaluate the kinetic parameters from TG experiments toward the scale-up application in the flame spread modeling of polymers. Several series of TG experiments are conducted with PE sample mass of 5, 20, 50, 100 and 200 mg in N 2 and air atmospheres. The little dependence of PE pyrolysis on sample mass in N 2 atmosphere indicates that the strong effect of sample mass on PE oxidation in air atmosphere is not due to the non-uniform heating of large mass sample in crucible but the different reaction. The activation energies of PE oxidation here are normally larger for the case with more sample mass, which illustrates that the flame spread of PE could be overestimated if the lower activation energies for small sample mass are used. Finally, the kinetic parameters of PE in previous works and the results here for different sample mass suggest the reasonability and reliability of the parameters by TG experiments with larger sample masses for flame spread modeling in reality. The series of data for thermal kinetics with a wide range of sample mass here are helpful for the scale-up application of the microscale thermal analysis.