Synthesis, kinetics and thermal stability of napthalenic polyimide silica nanocomposites

被引：6
作者：
Ali, Farman [1 ]
Saeed, Shaukat [2 ]
Shah, Syed Sakhawat [1 ]
Duclaux, Laurent [3 ]
机构：
[1] Hazara Univ Mansehra, Dept Chem, Mansehra 21300, Pakistan
[2] PIEAS, Dept Met & Mat Engn, PO Nilore, Islamabad 45650, Pakistan
[3] Univ Savoie Mont Blanc, LCME, F-73000 Chambery, France
来源：
MATERIALS RESEARCH EXPRESS | 2019年 / 6卷 / 02期
关键词：
polyimide; nanocomposites; kissinger; ozawa models; activation energy (Ea); COMPOSITE MEMBRANES; DEGRADATION;
D O I：
10.1088/2053-1591/aaf1d7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work synthesis, structural morphology, degradation profile and kinetic parameters of napthalenic polyimide (NPI) silica based nanocomposites have been reported. The NPI matrix were reinforced with modified and unmodified silica particles for comparison. The structure of NPI, organically modified napthalenic polyimide nanocomposites (ONPNC) and napthalenic polyimide nanocomposites (NPNC) were confirmed by FTIR spectroscopy. Morphology of the fabricated NPI-SiO2 nanocomposites was examined by field emission scanning electron microscopy (FE-SEM). The degradation kinetics of the nanocomposites was established by thermogravimetric analyzer (TGA) with variable heating rates (beta) of 5, 10 and 15 degrees C/min were used. The kinetic data were fitted to Flynn-Wall-Ozawa and Kissinger models for calculating the apparent activation energy (E-a). The results indicate that the modified silica has a significant impact upon the calculated kinetic parameters (E-a) values for thermal decomposition of ONPNC. Thermal stability and degradation kinetics suggest that these nanocomposite films could be used as polyelectrolyte membrane in fuel cell devices. The conclusion was drawn based on the results of FTIR, FE-SEM, TGA and degradation kinetics.
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页数：16
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