Materials Literature
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The main objective of this study was to produce ultraviolet curable unsaturated polyester which was then reinforced by variable percentage of kenaf fibre. Unsaturated polyester resin based on palm oil was prepared by the interaction of monoglyceride monomer with maleic anhydride. Gel fraction of the composites increas…
Single molecule detection schemes promise that one has the ability to reach the ultimate limit of detection: one molecule. In this paper, we use the stochastic luminescence of single semiconductor nanocrystals (quantum dots, QDs) to detect and localize particles as digital counts. These digital counts can be correlate…
The magnetocaloric effect of Ni 50 Mn 50− x Sn x ribbons ( x = 11–15) prepared by using melt-spinning and subsequent annealing has been investigated. The x-ray diffraction data of specimens show that all the samples are partially crystallized with Ni 2 MnSn phase. The magnetic transitions of these ribbons strongly dep…
In our experimental work the opportunities of improving of mechanical properties of rubbers and their composites have been investigated. On the one hand the reuse of milling product of recycled rubbers (recycled crumb rubbers) has been studied and the effects of the filler and compatibilizers applicable in rubber comp…
Polyindole nanowires were synthesized by oxidative polymerization of indole using ammonium persulphate as oxidant. The structure of polyindole nanowires was confirmed by XRD, FT-IR spectroscopy. The FT-IR of polyindole nanowires shows a peak at1480 cm -1 which corresponds to the C-N stretching of the polymer. The morp…
In this article, a commercial grade of polypropylene (PP) was reinforced with short poly(ethylene terephthalate) (PET) fibres up to 30 wt%. In order to have a reactive interface, two different compatibilizers, glycidyl methacrylate (GMA)-grafted PP and maleic anhydride (MA)-grafted PP, were used. To choose an optimize…
Size-sorted graphene nanoplatelets are highly desired for fundamental research and technological applications of graphene. Here we show a facile approach for fabricating size-sorted graphene oxide (GO) nanoplatelets by a simple centrifugal method using different dispersion solvents. We found that the small-sized GO na…
This work compares the equilibrium states reached by glassy selenium (g-Se) after several ageing durations at temperatures lower than the glass transition temperature T g, with the forecasts given by the configurational entropic model. The comparison is carried out through experimental data collected both on glassy sa…
A unique approach was used in which polyoxometalate-based ionic liquids (POM-IL) were synthesized and employed for the one-pot dissolution and conversion of biomass. A library of four functional POM-IL compounds was synthesized using two cationic organic groups (1-butyl-3-methylimidazolim and 1-ethyl-3-methylimidazoli…
When the transport correction is applied to the total cross-section, the self-scattering cross-section could have a negative value in order to preserve the balance of partial cross-sections. The negative self-scattering cross-section may lead to a negative impact on the convergence behavior for the method of character…
We show that the spin moment induced by $s{p}^{3}$-type defects created by different covalent functionalizations on a few-layer graphene structure can be controlled by an external electric field. Based on ab initio density functional calculations, including van der Waals interactions, we find that this effect has a de…
In order to analyze the effect of multiwalled carbon nanotubes on the thermal transport/stability characteristics of styrene butadiene rubber, five diverse loadings of multiwalled carbon nanotubes were impregnated in the rubber matrix using dispersion kneader and two roller mixing mill. Thermal conductivity and therma…
During the last decade, diesel engines have increased in popularity compared to gasoline engines because of their superior fuel economy, reliability and durability, simultaneously associated with a favorable fuel tax situation in several countries. At present, around 60% of all new European cars are equipped with dies…
Poly(methyl methacrylate) (PMMA) / ZrO 2 composites were prepared by sol gel method. The structural, micro structural and the dielectric properties of the composites were studied using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Hioki 3522-50 LCR Meter respectively. The electrical conductivity of c…
Multi-walled carbon nanotubes (MWCNTs)-filled epoxy composites and poly(methyl methacrylate) (PMMA) coatings were prepared by mechanical grinding with the use of a planetary ball mill. Electromagnetic interference shielding effectiveness, electromagnetic absorption and reflection properties of the materials were inves…
Syntheses and characterization of aminooxy terminated polymers of N-(2-hydroxyproyl) methacrylamide (HPMA) of controlled molecular weight and narrow molecular weight distribution are presented here. Design of a chain transfer agent (CTA) containing N-tert-butoxycarbonyl (t-Boc) protected aminooxy group enabled us to u…
The interplay between the angle-dependent X-ray reflectivity, X-ray absorption and the photoelectron attenuation length in the photoelectron emission process determines the optimal X-ray incidence angle that maximizes the photoelectron signal. Calculations in the wide VUV to the hard X-ray energy range show that the o…
The effect of zinc oxide (ZnO) 250 nm on the mechanical, thermal and morphological properties of the composites of poly(styrene-co-acrylonitrile) (SAN), poly(methyl methacrylate) (PMMA) and ZnO was investigated. The Young's modulus of 20SAN/PMMA/ZnO and 40SAN/PMMA/ZnO increased at low ZnO content. Increasing content o…
The longitudinal optical phonon of metallic nanotubes shifts by 23 cm${}^{\ensuremath{-}1}$ to lower energies when the nanotubes are deposited from a solution onto a substrate. The linewidth increases by 13 cm${}^{\ensuremath{-}1}$. The changes are explained in terms of shifts in the Fermi energy that influence the Ko…
We show through first-principles calculations that the electronic properties of Pt4 clusters can be tuned by adsorption on substrates with different electronic valence characters. Pt clusters exhibit a metallic character on γ-Al2O3(111) and insulator properties on CaZrO3(001). The noted difference indicates the role o…