NDLI: Thermal behavior of poly (ethyl methacrylate-co-acrylonitrile) nanocomposites prepared in the presence of an Algerian bentonite via solution intercalation and in situ polymerization

Content Provider	Springer Nature Link
Author	Kadi, Souad Djadoun, Saïd
Copyright Year	2014
Abstract	Nanocomposites based on Poly (ethyl methacrylate-co-acrylonitrile) containing 20 mol% of acrylonitrile (PEMAN20) and a bentonite from Algeria, modified by Hexadecyltrimethylammonium chloride (HDTMA), were successfully prepared via solution method and in situ polymerization using tetrahydrofuran (THF) as a solvent. Interactions between the clay and polymer matrix occurred and were evidenced by Fourier transform infrared spectroscopy (FTIR). Depending on the clay loading, intercalated or mixed partially exfoliated nanocomposites, investigated by X-ray diffraction (XRD) and transmission electronic microscopy (TEM), were obtained. All elaborated hybrids exhibited an overall improved thermal stability and a moderate increase in their glass transition temperatures compared to virgin (PEMAN20) as evidenced by thermogravimetric (TG) and differential scanning calorimetry (DSC) analyses. Apparent activation energies E $_{ α }$ of thermal decomposition of these materials were estimated using Tang’s method and showed that higher E $_{ α }$ values were obtained with virgin PEMAN20 compared to its sPEMAN20/OMMT (2 or 4 mass%) nanocomposites. Different thermal decomposition behaviors were, however, observed with hybrids prepared via in situ polymerization. Nanocomposites prepared in the presence of low clay loading (1 % by mass) via both methods were of partially exfoliated structures. The increase of their apparent activation energies, compared to virgin PEMAN20 or PEMAN20/OMMT (2 or 4 mass%) nanocomposites, confirmed the change in the degradation mechanism with the clay loading and the intercalated/exfoliated structures.
Starting Page	1113
Ending Page	1122
Page Count	10
File Format	PDF
ISSN	13886150
Journal	Journal of thermal analysis
Volume Number	119
Issue Number	2
e-ISSN	15882926
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-11-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Maghnia bentonite Poly(ethyl methacrylate-co-acrylonitrile) nanocomposite Solution intercalation Intercalated-partially exfoliated nanocomposite Thermal properties Kinetic of thermal decomposition Physical Chemistry Analytical Chemistry Polymer Sciences Inorganic Chemistry Measurement Science and Instrumentation
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Condensed Matter Physics

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