Optical and kinetics of thermal decomposition of PMMA/ZnO nanocomposites

被引：0
|
作者：
M. Khairy
N. H. Amin
R. Kamal
机构：
[1] Benha University,Chemistry Department, Faculty of Science
[2] Al-Imam Muhammad Ibn Saud Islamic University,Chemistry Department, College of science
[3] Ain Shams University,Chemistry Department, Faculty of Education
来源：
Journal of Thermal Analysis and Calorimetry | 2017年 / 128卷
关键词：
PMMA; Nano-ZnO; Nanocomposites; Thermogravimetric analysis; Non-isothermal decomposition kinetics; Kinetic models;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
PMMA/ZnO nanocomposites with different concentrations of nano-ZnO were prepared by in situ polymerization method. The effect of ZnO on the morphology, optical properties and thermal degradation kinetics of PMMA was investigated by means of XRD, TEM, FTIR, TG–DSC, photoluminescence (PL) spectra and UV–visible absorption spectra. The introduction of ZnO into PMMA slightly increases its thermal stability. The PL intensity of PMMA/ZnO nanocomposites increases with increasing the concentration of ZnO in the PMMA. The kinetic parameters were evaluated from TG data by several integral and iso-conversional methods. Based on the iterative iso-conversional calculation procedure, the activation energy values Eit for the decomposition steps obtained were evaluated. The activation energy values for the thermal degradation of the nanocomposites were higher than that of pure PMMA. The most probable mechanism functions for the degradation of PMMA and its nanocomposite are suggested.
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页码：1811 / 1824
页数：13
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