Application of Different Methods for the Thermogravimetric Analysis of Polyethylene Samples

作者：Baloch Musa Kaleem^*; Khurram Malik Jehan Zeb; Durrani Gulrez Fatima

来源：Journal of Applied Polymer Science, 2011, 120(6): 3511-3518.

DOI：10.1002/app.33538

• activation energy
• Augis-Bennett's method
• Coats-Redfern method
• Flynn-Wall-Ozawa method
• Kissinger method
• order of reaction
• polyethylene

The kinetics of thermal degradation of standard and commercial polyethylene (PE) samples is investigated, by employing different methods like Flynn-Wall-Ozawa, Coats-Redfern, Kissinger, and Augis-Bennett. The order of reaction obtained was 0.741 and 1.124 for standard and commercial samples, respectively. The activation energy obtained in this way was 279.6-311.0 kJ/mol and 300.5-374.1 kJ/mol for standard and commercial samples, respectively, depending upon the method used. The activation energy obtained by different methods decreases in the order Flynn-Wall-Ozawa" Augis and Bennett" Kissinger" Coats and Redfern. It is observed that most of the methods deviated from the experimental results, in low (0.1-0.3) degree of conversion region but worked well in the middle (0.5-0.7) degree of conversion region. It has also been noticed that both the order and activation energy were slightly dependent over the heating rate and degree of conversion.

• 出版日期2011-6-15