Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/13896
ชื่อเรื่อง: Thermal degradation mechanism of highly filled nano-SiO2 and polybenzoxazine
ผู้แต่ง: Dueramae I.
Jubsilp C.
Takeichi T.
Rimdusit S.
Keywords: Activation energy
Decomposition
Degradation
Enzyme kinetics
Kinetics
Pyrolysis
Thermogravimetric analysis
Degradation temperatures
Diffusion controlled reactions
Nano- SiO
Nonisothermal thermogravimetric analysis
Polybenzoxazine
Thermal decomposition process
Thermal degradation kinetics
Thermal degradation mechanism
Nanocomposites
วันที่เผยแพร่: 2014
บทคัดย่อ: Effects of high nano-SiO2 loading (up to 30 mass%) on polybenzoxazine (PBA-a) thermal degradation kinetics have been investigated using nonisothermal thermogravimetric analysis (TG). The DTG curves revealed three stages of thermal decomposition process in the neat PBA-a, while the first peak at low temperature was absent in its nanocomposites. As a consequence, the maximum degradation temperature of the nanocomposites shifted significantly to higher temperature as a function of the nano-SiO2 contents. Moreover, the degradation rate for every degradation stage was found to decrease with the increasing amount of the nano-SiO2. From the kinetics analysis, dependence of activation energy (E a) of the nanocomposites on conversion (α) suggests a complex reaction with the participation of at least two different mechanisms. From Coats-Redfern and integral master plot methods, the average E a and pre-exponential factor (A) of the nanocomposites showed systematically higher value than that of the PBA-a, likely from the shielding effect of the nanoparticles. The main degradation mechanism of the PBA-a was determined to be a random nucleation type with one nucleus on the individual particle (F1 model), while that of the PBA-a nanocomposite was the best described by diffusion-controlled reaction (D3 model). © 2013 Akadémiai Kiadó, Budapest, Hungary.
URI: https://ir.swu.ac.th/jspui/handle/123456789/13896
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898835248&doi=10.1007%2fs10973-013-3542-0&partnerID=40&md5=3beadeed54121d870abc9f1686fc9d63
ISSN: 13886150
Appears in Collections:Scopus 1983-2021

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