Abstract
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.
Highlights
Thermoplastic polymers have physical and chemical properties that meet the requirements for many industrial applications
Taha et al [3] investigated the thermal stability of polyvinyl chlorine (PVC)/SnO2 nanocomposite, and they found that the glass transition increased for SnO2-doped samples
We aim to investigate the kinetics of the thermal analysis of PVC/ZnO nanoparticle using different kinetic models
Summary
Thermoplastic polymers have physical and chemical properties that meet the requirements for many industrial applications. In order to improve the thermal properties of PVC, Hajibeygi et al [2] used a ternary nanocomposite containing PVC/chitosan-modified ZnO nanoparticles. They further investigated the thermal stability by using PVC-modified ZnO nanoparticles with imide functionalized polyethyleneimine (PEI). PVC reinforced by ZnO nanoparticles was investigated by Mallakpour and Darvishzadeh [4] According to their TGA data, the thermal stability of PVC at the high-temperature stage was increased by increasing the percent of ZnO/bovine serum albumin BSA nanoparticles. The thermal stability of PVC/TiO2 nanoparticles covered by bovine serum was investigated by Mallakpour and Shamsaddinimotlagh [5] Their TGA analysis showed higher thermal stability for the nanocomposite samples than the host polymer in its pure form
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