Materials Literature
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Abstract Summary: The polymerization of (9‐carbazolyl)methylthiirane in the presence of cyclic oligo(potassium glycidoxide) as the macroinitiator activated 18‐crown‐6 leads to polythioether with the molecular masses relatively near to the calculated ones. This polythioether dispersed in a commercially available transp…
Stress relaxation behavior of thermosetting polyurethane (PU) solid and foams were investigated in tensile mode using a dynamic mechanical analyzer (DMA). PU solid samples were manufactured in a closed mold to avoid any foam formation, whilst PU foam samples were manufactured inside a woven using a silicone mold. Samp…
A nanocarbon-infused aluminum-matrix composite, termed "covetic, " has been developed by Third Millennium Metals, LLC, and we have evaluated the enhanced performance prospects for strength and electrical conductivity. This paper examines the effects of the nanoscale carbon on the physical, electrical…
Methyl vinyl silicon rubber (MVQ) composites were reinforced by adough-moulding compound (DMC), in which silica was used as filler by blending method. The influences of silica and DMC content, and cure conditions on the mechanical and thermal properties of the composites were investigated. The compatibility and crossl…
ZnO films with special textures are fabricated on Mo-coated Al2O3 ceramic substrates by the catalyst-free electron beam evaporation method, and the as-deposited films are treated by hydrogen plasma. It is found that the surface morphologies of the films are changed significantly after hydrogen plasma treatment and tha…
The electric-field control of magnetization has many potential applications in magnetic memory storage, sensors, and spintronics. A new multiferroic spin-valve (SV) heterostructure was grown by combining a multiferroic BiFeO3(BFO) and a Co90Fe10/Cu/Co90Fe10spin valve on Pt/Ti/SiO2/Si substrate. Through the magnetoelec…
We study the precession frequency and effective damping of patterned permalloy thin films of different geometry using integrated inductive test structures. The test structures consist of coplanar wave guides fabricated onto patterned permalloy stripes of different geometry. The width, length and position of the permal…
The results of the first experimental study of coplanar three-beam X-ray diffraction in a paratellurite (TeO 2 ) single crystal using synchrotron radiation on a Kurchatov synchrotron radiation source are presented. Four cases with (220, 371), (220, 464), (220, 370), and (110, 557) indices have been investigated. In al…
The morphology of nanostructures, which were grown on the (0001) van der Waals surface of layered GaSe crystals and annealed under thermodynamically equilibrium conditions at high pressures of sulfur vapor, has been investigated using atomic force microscopy. The morphology and phase composition of the nanostructures…
Abstract The wetting characteristics of hyperbranched polyesters (HBP) added cyclic olefin copolymer (COC) melt in microchannels of anodized alumina oxide (AAO) template were studied. The wetting displacements in microchannels were measured by scanning electronic microscopy (SEM). Compared with pure COC matrix, the co…
Based on infrared microscopic studies, we show that clusters of impurity nickel atoms are uniformly distributed over the entire volume of the silicon crystal; by varying the density of the clusters in silicon exposed to γ-radiation, it is possible to control the concentration of the electroactive atoms and the structu…
Crystalline surface species were observed at the surface of polyamide 12 materials upon accelerated aging. After detection of the depositions with scanning electron microscopy (SEM), the crystalline surface precipitations were analyzed with Fourier transform infrared (FT-IR) and Raman imaging microscopy. These surface…
A present trend in aircraft design is the increasing use of 270-Vdc power circuitry. Also, significant voltage spikes may be superimposed on the dc level. In many situations involving unsealed equipment enclosures, electrical insulation is provided by a combination of gaseous medium and spacing between conductors. Con…
The extraction of collagen from fish scales with papain under ultrasonic pretreatment was conducted in this paper. The effects of the ultrasonic pretreatment time, the ratio of papain to fish scales, the extraction temperature and the extraction time on the extraction rate of collagen were investigated by single facto…
Carbon nanotube (CNT) reinforced alumina matrix nanocomposite was successfully synthesized by two different techniques. In the first process sol-gel method was used to generate 3 wt% homogeneously distributed CNT in alumina matrix after sintering. In another novel method chemical mixing process was adopted for synthes…
Six new photosensitive and optically active poly(amide-imide)s 8a–8f with good inherent viscosities based on dibenzalacetone moiety were synthesized from the direct polycondensation reaction of N-Trimellitylimido-L-amino acids 3a–3f with 2,5-bis(4-aminobenzylidene)cyclopentanone 7 by two different methods such as dire…
Two new compounds, along with two known compounds, were isolated from the barks of Parabarium huaitingii, and their structures were determined as 5α-pregn-6-ene-3β,17α,20(S)-triol-20-O-β-d-digitoxopyranoside (1), cymaropyranurolactone 4-O-β-d-digitalopyranosyl-(1 → 4)-O-β-d-cymaropyranosyl-(1 → 4)-O-β-d-oleandropyrano…
Magnetic measurements and TEM analysis have been carried out in order to investigate the activation volume and its correlation with physical grain size within plasma sputtered Co2FeSi thin films. This has led to a new technique for estimating the volumes of ordered and disordered interfacial regions within granular He…
An infinite grating of identical dielectric cylinders placed periodically in free space and illuminated by a plane wave is investigated. Numerical and analytical solutions are derived for the E and H-polarisation cases. The study is focused on the ultra high-Q resonances at the frequencies close to the Rayleigh “anoma…
Hexagonal K2W4O13 nanorods have been synthesized by hydrothermal treatment of the WO3 x H2O precipitate at 180 degrees C in the presence of K2SO4. The K2W4O13 nanorod single crystals of approximately 12 nm in diameter and tens to few hundreds nm long with the principal axis along the (001) direction were obtained when…