Some confusion concerning integral isoconversional methods that may result from the paper by Budrugeac and Segal ?Some Methodological Problems Concerning Nonisothermal Kinetic Analysis of Heterogeneous Solid-Gas Reactions?

2002 ◽  
Vol 34 (7) ◽  
pp. 418-420 ◽  
Author(s):  
Sergey Vyazovkin
Keyword(s):  
Kinetic Analysis ◽  
Isoconversional Methods ◽  
Nonisothermal Kinetic ◽  
Methodological Problems ◽  
Gas Reactions ◽  
Heterogeneous Solid ◽  
Nonisothermal Kinetic Analysis

scholarly journals Nonisothermal Kinetic Analysis and AC Conductivity for Polyvinyl Chloride (PVC)/Zinc Oxide (ZnO) Nanocomposite

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
Huda AlFannakh
Keyword(s):  
Thermal Stability ◽  
Zinc Oxide ◽  
Kinetic Analysis ◽  
Zno Nanoparticles ◽  
Ac Conductivity ◽  
Zno Nanoparticle ◽  
Nonisothermal Kinetic ◽  
Increasing Temperature ◽  
Host Polymer ◽  
Nonisothermal Kinetic Analysis

The behavior of polyvinyl chlorine (PVC)/zinc oxide (ZnO) nanoparticles was investigated. To improve the dispersion and distribution of zinc nanoparticles within the host polymer (PVC), they were treated with water before being added to the polymer. The nanocomposite samples were prepared by casting method using different weight ratios of ZnO nanoparticles. The prepared nanocomposite samples were characterized by thermogravimetric analysis (TGA). Both thermal stability and kinetic analysis of the prepared samples were investigated. The ZnO nanoparticles lower the activation energy and decrease the thermal stability of PVC. Kissinger, Flynn-Wall-Ozawa, and Kissinger-Akahira-Sunose models were used in the nonisothermal kinetic analysis of PVC/ZnO nanocomposite samples. The thermal stability behavior due to the addition of zinc oxide nanoparticles was explained and correlated with the behavior of the kinetic parameters of the samples. The AC conductivity as function of frequency and temperature was also investigated. The addition of ZnO nanoparticle increases the AC conductivity, and the temperature-independent region decreased by increasing temperature. Both S and A coefficients were predicted using the Jonscher power law and OriginLab software. The trends of S and A coefficients were discussed based on the glass transition of the host polymer.

scholarly journals Isoconversional nonisothermal kinetic analysis of municipal solid waste, refuse‐derived fuel, and coal

2020 ◽  
Vol 8 (10) ◽  
pp. 3728-3739
Author(s):  
Mudassar Azam ◽  
Asma Ashraf ◽  
Saman Setoodeh Jahromy ◽  
Waseem Raza ◽  
Hassan Khalid ◽  
...  
Keyword(s):  
Municipal Solid Waste ◽  
Kinetic Analysis ◽  
Solid Waste ◽  
Nonisothermal Kinetic ◽  
Refuse Derived Fuel ◽  
Nonisothermal Kinetic Analysis
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