Materials Literature
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Abstract Summary: Impact poly(propylene) copolymers (ICPP) are complex polymer systems containing various types of ethylene‐propylene copolymers as well as the majority poly(propylene) phase. In this study, multidimensional analytical techniques are applied to study the thermo‐oxidative degradation of these complex ma…
In this paper, two sets of samples are examined, one for plain polyester resin and the other for glass fiber composite. In both sets, a pin to plane configuration is used to grow electrical trees around the barrier area. Several patterns of tree propagation are investigated. Due to the effect of barrier to hinder the…
Single crystals of the laser host material Sc 2 SiO 5 as well as thulium- (4 at.-%) and ytterbium- (5 at.-%) doped samples were prepared by the Czochralski technique. The structures of Sc 2 SiO 5 , Tm 3 +:Sc 2 SiO 5 , and Yb 3+ :Sc 2 SiO 5 were refined on the basis of high-quality single-crystal X-ray diffraction data…
Nanometer α-nickel hydroxide codoped with Cu and Al has been synthesized by the ultrasonic-assisted precipitation method. The crystal structure and particle size were analyzed by X-ray diffraction (XRD) and particle size distribution (PSD). The electrochemical performance of the samples was characterized by the charge…
Preparation of gold nanoparticles by chemical reduction method using Preyssler heteropolyacid was investigated. The experimental conditions have been optimized using Taguchi robust design method with L9 orthogonal array. Particle size of the gold nanoparticles was considered as the property in the optimization. Amount…
The unique properties of carbon nanotube (CNT) have made it very attractive as reinforcement in polymer nanocomposites in the hope of effectively improving the mechanical properties. In order to explore the effects of three appealing influencing factors, i.e., acid treatment, pressured curing, and liquid rubber (LR) o…
Abstract The effects of eight different dispersants on the stability of multiwalled carbon nanotubes (MWCNTs) in vinyl ester (VE) resin systems have been systematically analyzed. Suspensions incorporating different amounts of dispersants relative to the concentration of MWCNTs in the VE have been prepared. The resista…
The high spin polarized Fe3O4 was incorporated with α-Fe2O3 to form micro-cubes with high Curie temperature. It was observed that the magnetic characteristics of such hybrid structure are quite different from those of pure Fe3O4 or α-Fe2O3 phase, such as the absence of hematite Morin transition and the strong temperat…
(2CaO · 0.5Al 2 O 3 · 5SiO 2 ): Eu and (CaO · 0.2Al 2 O 3 · SiO 2 ): Eu phosphors doped with B 2 O 3 in an amount of 3 wt % are obtained by direct solid-phase synthesis at 1350°C. When excited by LED radiation with a maximum at 380 nm, these phosphors emit white light with color coordinates, which are close to those i…
Application of the Langmuir probe in plasma circumstance for deposition of diamond-like carbon (DLC) thin films usually faces the problem of rapid failure of the probe due to surface insulative coating. In this paper, we circumvent the problem by using the floating harmonic probe technique. In the real circumstance of…
In this research, we synthesized a novel graft copolymer of gelatin-based via radical polymerization mixtures Acrylic acid (AcA) and Acrylamide (AAm) onto gelatin backbones. The polymerization reaction was carried out in an aqueous medium and in the presence of ammonium persulfate (APS) as an initiator. Evidence of gr…
byproduct gases are swept away. Desirable characteristics for ALD precursors include high volatility, good thermal stability at the ALD growth temperatures, and high reactivity with the other compound used for the film growth. A purge period is introduced between each precursor dose to prevent mixing of the chemicals…
The mechanism of stress relaxation in nanocrystalline Fe-N thin film has been studied. The as-deposited film possesses a strong in-plane compressive stress which relaxes with thermal annealing. Precise diffusion measurements using nuclear resonance reflectivity show that stress relaxation does not involve any long-ran…
The present paper describes the effect of cation, present in a basic cationic building layer and anion in interlayers on the thermal stabilizing properties of hydrotalcites. Hydrotalcites having Cl− and in their anionic layer, having basic cationic layers Mg and Ca, were synthesized by hydrothermal treatment. These ma…
Kein Quasikristall: Nahezu fünfzählige Symmetrie liegt in den bronzeartigen, durch Na-Atome separierten Kupfer-Zinn-Stäben von Na2.8Cu5Sn5.6 vor (siehe Bild). Die Stäbe werden mit [Sn@Cu12@Sn20]12−-Clustern, die in A12Cu12Sn21-Phasen (A=Na–Cs) gefunden wurden, verglichen, und in Analogie zu den Zintl-Phasen der p-Bloc…
Why vapor species land on the surface of the nanoparticle seed for nanotube synthesis is a vital question. An investigation has been carried out to find an answer to it. For this, a model of the dipole moment has been developed. A bimetallic alloy (non-alloy, solid solution) exhibiting the shape of a cap has been assu…
We found that the distances between isolated scatterers with similar columnar shapes could be measured by taking a single Fourier transform of their diffraction intensity. If the scatterers have different shapes, the distances between similar shapes can be selected from the distances between all the shapes. The distan…
The relationship between the structure and the kinetics of the thermal oxidation of the poly(3-hydroxybutyrate) — ethylene propylene rubber and polyethylene — poly(3-hydroxybutyrate) systems is studied. For the first system containing 30–50 wt % poly(3-hydroxybutyrate), phase inversion is observed, which affects its r…
Process and composition variables of catalytic oxidation of 2-propanol on Pt-Mn/γ-Al(2)O(3) bimetallic catalysts were optimized and modeled by response surface methodology (RSM). 31 factorial experiments were designed by setting four factors at five levels: X (1) = amount of manganese loading (wt.% Mn = 1, 3, 5, 7, 9)…
The spark plasma sintering (SPS) process is known for its rapid densification of metals and ceramics. The mechanism behind this rapid densification has been discussed during the last few decades and is yet uncertain. During our SPS experiments we noticed oscillations in the applied pressure, related to a change in ele…