Sirapanichart, S., Khouchaf, L., Siriphannon, P., Monvisade, P., Louarn, G. & Elouadi, B. (2010) Chemical and Dielectric Study of PMMA/Montmorionite Nano-Composite Films. Ferroelectrics, 402 47–54.
Added by: Laurent Cournède (2016-03-10 21:37:33)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 0015-0193
Clé BibTeX: Sirapanichart2010
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Créateurs: Elouadi, Khouchaf, Louarn, Monvisade, Sirapanichart, Siriphannon
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Tetrabutylphosphonium intercalated montmorillonite (P-MMT) was dispersed in toluene using sonication technique and a PMMA/toluene solution. The PMMA/P-MMT nano-suspension was then casted as a composite film on a glass plate, using spin coating technique with a rotation of 180 rpm. The composite films were characterized by various analytical techniques such as X-ray diffraction, X-ray fluorescence spectrometry thermo-gravimetric analysis, etc. The montmorillonite interlayer distance, estimated XRD results, was found to be equal to 1.6 nm. The PMMA/3 wt\%P-MMT nano-composite film was found to completely decomposed at the temperature Td (PMMA/3 wt\%P-MMT) = 370 degrees C which is slightly higher than that of the neat PMMA, i.e. 365 degrees C. It was also found that both plots of epsilon'r and epsilon''r versus frequency display equivalent behaviour. The optical absorption spectra show a rather large domain of transparency between 300 and 2700 nm, with a rather structured absorption band between 1700 and 2700 nm. Dielectric constant ranges near 1 to 3, depending on the frequency. This is very important for some electronic application, as underlined by former Authors.
Added by: Laurent Cournède