Journal ArticleDOI
Sono-synthesis of polystyrene/alumina nanocomposites:
Mercy Anna Philip,Upendra Natarajan,Rajarathinavelu Nagarajan +2 more
- Vol. 226, Iss: 4, pp 157-164
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TLDR
In this paper, the preparation of nanocomposites by the usage of ultrasound was focused on synthesizing polystyrene/alumina composites using commercial alumina nanoparticles of approximately 200 nm size.Abstract:
Polymer nanocomposites offer remarkable enhancement in properties compared to pristine polymers, and also compared to conventional micro- and macro-composites. The present study is focused on the preparation of nanocomposites by the usage of ultrasound. Polystyrene/alumina nanocomposites were synthesized using commercial alumina nanoparticles of approximately 200 nm size. These particles were dispersed in polystyrene solution by subjecting to ultrasound. Composites were synthesized at different filler loadings varying from 0.2% to 1% by weight. Dispersion characterization of these composites was carried out using scanning electron microscopy and X-ray diffraction. X-ray diffraction data revealed the incorporation of the filler into the polymer matrix. The mechanical properties, mainly tensile and impact properties, of the composites were studied to analyse the effect of nanofillers on the enhancement in functional properties compared to the neat polymer. Tensile strength and modulus varied with the filler...read more
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References
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Book ChapterDOI
Synthesis of an Intercalated Compound of Montmorillonite and 6-Polyamide
TL;DR: In this paper, the ion-exchanged montmorillonite and e-caprolactam were ion exchanged for NH 3 + -(CH2)11-COOH, NH 3 −(CH 2)11−COCOH, COOH+COCOOH>Al3+>Al 3+>NH 3 + −( CH2)5−COH>H+>Mg2+>Co2++>Li+>K+.
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Akane Okada,Yoshiaki Fukushima,Masaya Kawasumi,Shinji Inagaki,Arimitsu Usuki,Shigetoshi Sugiyama,Toshio Kurauchi,Osami Kamigaito +7 more
TL;DR: In this article, a polymer matrix containing polyamide and layers of a silicate uniformly dispersed in the order of molecules in the polymer matrix, each of said silicate layers being 7 to 12 Å thick and the interlayer distance being at least 20Å.
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Average stress in the matrix and effective moduli of randomly oriented composites
TL;DR: In this article, the variation of average stress in the matrix, some elastic properties of randomly oriented composites are established as a function of aspect ratio, and the results suggest that the in-plane properties are most effectively reinforced by fibrous inclusions, whereas the out-of-plane ones are more responsive to the disc type.
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Mechanical Behavior of Alumina/Poly(methyl methacrylate) Nanocomposites
TL;DR: In this article, the brittle-to-ductile transition in uniaxial tension was found to depend on poor interfacial adhesion between polymer and nanoparticle, which allows the nucleation of voids, typically by larger particles.
Journal ArticleDOI
Sonochemical degradation of azo dyes in aqueous solution: a new heterogeneous kinetics model taking into account the local concentration of OH radicals and azo dyes
TL;DR: A new kinetics model taking into account the heterogeneous reaction kinetics similar to a Langmuir-Hinshelwood mechanism or an Eley-Rideal mechanism is proposed, based on the local reaction site at the interface region of the cavitation bubbles, where azo dye molecules are quickly decomposed.