Effect of Barium Stearate on the Thermal Stability of Polyvinyl Chloride

Abstract:

Thermal degradation reaction kinetics of PVC stabilized by barium stearate were studied by means of the non-isothermal weight-loss technique under a nitrogen atmosphere. The results show that the lowest decomposition temperature is greater than 203.6°C and 217.2°C in the conversion rate of 5% and 10% respectively. When the heating rate β is 10°C/min, at 200°C and 225°C the remaining mass from the sample with barium stearate was 99.1% and 95.3%, respectively. The thermal decomposition process occurred in three stages, the results calculated by various methods show that the average apparent activation energy in first, second and third phase is 79.88kJ/mol, 89.37kJ/mol and 187.34kJ/mol respectively. In the initial reaction ( α<18%), as heating rate is 20°C/min, the decomposition reaction is controlled by the (A1.5) mechanism.

• Periodical: Applied Mechanics and Materials (Volumes 395-396)
• Pages: 371-376
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.395-396.371
• Online since: September 2013
• Authors: Yi Heng Lu, Wei Long Liu, Feng Wei, Shuang Chun Ma
• Keywords: Barium Stearate, Lifetime, Non-Isothermal Kinetics, PVC, Thermal Decomposition

References

[1] O. M. Folarin，E. R. Sadiku，Int. J. Phys. Sci. ，Vol. 6 (2011)， p.4323.

[2] O. M. Folarin，I. C. Eromosele，C. O. Eromosele，J. Mater. Environ. Sci. Vol. 3(2012)， p.507.

[3] Feng Wei, Yi heng LU, Wei long Liu, Advanced Materials Research，Vols. 550-553 (2012), p.838.

[4] E. Arkış, D. Balköse, Polym. Degrad. Stab. ，Vol. 88 (2005)， p.46.

[5] Reiner Sauerwein, Plastics, Additives and Compounding，Vol. 11 (2009)，p.16.

[6] Hu, R. Z.; Shi, Q, Z; Thermal analysis kinetics, second edition. Beijing: Science Press, (2008) (in Chinese).

[7] Sergey V, Alan K. B, José M. C, et al, Thermochimica Acta , Vol. 520(2011), p.1.

[8] DAKIN T W. AIEE Transactions, Part I ( Communication and Electronics) , Vol. 67 (1948), p.113, p.122.