Kinetic Study of PVC Pyrolysis in Air by Thermogravimetric Analysis Using the Friedman Method

Abstract:

The thermal degradation of PVC in air ambience was investigated by the thermogravimetric analysis (TGA). The experiments were carried out at different heating rate of 5, 10, 20 and 40°C/min, respectively. The activation energy was calculated by the Friedman method. The pyrolysis mechanism of PVC in air was discussed and compared with that in Nitrogen atmosphere. The pyrolysis process of PVC in air could be divided into two main stages: 200 °C ~ 380 °C and 400 °C ~ 600 °C, which obtained by TGA at the heating rate of 5°C/min. The second stage could be further subdivided into two parts by 465 °C. It can be concluded that the oxygen in air affected the second stage more obviously than that of the first one, in comparison with inert atmosphere. The activation energy of the second stage was still larger than the first stage.

• Periodical: Advanced Materials Research (Volume 427)
• Pages: 64-69
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.427.64
• Online since: January 2012
• Authors: Bin Han, Yu Long Wu, Wei Feng, Zhen Chen, Ming De Yang
• Keywords: Kinetic Parameter, PVC, Thermogravimetric Analysis (TGA), Thermo-Oxidative Decomposition

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