Kinetic studies on the thermal decomposition of gamma-irradiated poly(vinyl alcohol (PVA)/methyl cellulose (MC) blends
Senna, M., Helal, R., Mostafa, T., El-Naggar, A. (2015). Kinetic studies on the thermal decomposition of gamma-irradiated poly(vinyl alcohol (PVA)/methyl cellulose (MC) blends. EKB Journal Management System, 32(part 1), 270-290. doi: 10.21608/jsrs.2015.18811
Magdy M. Senna; Reham H. Helal; Tahia A. Mostafa; Abdel Wahab M. El-Naggar. "Kinetic studies on the thermal decomposition of gamma-irradiated poly(vinyl alcohol (PVA)/methyl cellulose (MC) blends". EKB Journal Management System, 32, part 1, 2015, 270-290. doi: 10.21608/jsrs.2015.18811
Senna, M., Helal, R., Mostafa, T., El-Naggar, A. (2015). 'Kinetic studies on the thermal decomposition of gamma-irradiated poly(vinyl alcohol (PVA)/methyl cellulose (MC) blends', EKB Journal Management System, 32(part 1), pp. 270-290. doi: 10.21608/jsrs.2015.18811
Senna, M., Helal, R., Mostafa, T., El-Naggar, A. Kinetic studies on the thermal decomposition of gamma-irradiated poly(vinyl alcohol (PVA)/methyl cellulose (MC) blends. EKB Journal Management System, 2015; 32(part 1): 270-290. doi: 10.21608/jsrs.2015.18811

Kinetic studies on the thermal decomposition of gamma-irradiated poly(vinyl alcohol (PVA)/methyl cellulose (MC) blends

Journal of Scientific Research in Science
Article 16, Volume 32, part 1, December 2015, Page 270-290  XML PDF (12.6 MB)
Document Type: Original Article
DOI: 10.21608/jsrs.2015.18811
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Authors
Magdy M. Senna1; Reham H. Helal1; Tahia A. Mostafa2; Abdel Wahab M. El-Naggar1
1Radiation Chemistry Department, National Center for Radiation Research and Technology, B.O. Box 29 Nasr City, Atomic Energy Authority, Cairo Egypt
2Chemistry Department, College for Girls, Ain Shams University, Cairo, Egypt
Abstract
  Poly(vinyl alcohol)/ methyl cellulose (PVA/MC) blends, at different ratios were prepared into films by solution casting using, water as a common solvent, and gamma irradiated at various doses. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) were used to study the thermal properties of gamma irradiated PVA/MC blends. It is expected that these methods would enable to understand the effect of gamma irradiation on the mechanism of thermal decomposition. The kinetic parameters such as energy of activation (Ea) and regression r2 for the thermal decomposition were determined by three different methods. In the present work, the Coats-Redfern, Broido and Horowitz-Metzger methods were applied. The results indicated that the Ea and r2 values of the gamma irradiated PVA/MC blends as determined by the three methods were comparable.
 
Keywords
Poly(vinyl alcohol); Methyl cellulose; gamma radiation; Thermal properties; Kinetic studies
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