Materials Literature
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A bis(diamino-diamido) tetrathiafulvalene (TTF) derivative H(4)L(2) has been designed and synthesized. Experiments of pH titration reveal that integrating the redox active TTF unit with the diamino-diamido moiety adds new properties to the traditional ligand. Oxidation of the TTF moiety increases the acidity of the am…
Surfactants such as non-ionic polyethylene glycol tert-octylphenyl ether (Triton X-114) have been studied as efficient corrosion inhibitors in acid medium. In this study inhibition performance of Triton X-114 has been evaluated as corrosion inhibitor for mild steel in 0.5 mol l−1 H2SO4. The electrochemical impedance s…
Radiation rate of a dipole in close proximity to a hyperbolic metamaterial is theoretically investigated. Homogenized effective medium is found to overestimate the Purcell factor compared to real metal-dielectric subwavelength multilayers.
Owing to their superior mechanical properties, carbon nanotubes (CNTs) can be used as an additional reinforcement to improve the mechanical properties of laminated composite materials. To incorporate the excellent properties of CNTs into the existing traditional composite technology, vertically aligned high density ar…
A phosphorus (P)-containing diamine was synthesized and used as a comonomer at a minor fraction to improve insufficient non-flammability of a poly(ester imide) system as a promising candidate of base film materials in flexible printed circuit boards (FPC). The P-modified PEsI copolymer film displayed the highest level…
A convenient hydrothermal method has been developed for the controllable synthesis of various nanostructures of manganese oxides and their derivatives through modified redox reactions between Mn2+ and the combinative oxidizer of KBrO3/KX (X = Cl, Br, I). The morphologies and oxidation states of the products could be m…
Effect of rare earths (RE) in the rare earth copper oxides, RE2CuO4 (RE = La, Pr, Nd, Sm, Gd) and RE2Cu2O5 (RE = Dy, Ho, Er, Yb, Y), on the carbon oxidation was investigated by the DSC (differential scanning calorimetry) measurement. Orthorhombic La2CuO4 and tetragonal RE2CuO4 (RE = Pr–Sm) prepared at 800°C showed hig…
In this article we examine the effects of cyclohexane and perfluorocyclohexane being used as bulky end groups on the mesomorphism of classical smectic liquid crystal mesogens. The mesogen that is used in this work is typical of the MHPOBC family of materials. The mesophase behaviour is investigated and miscibility stu…
As a new organic reaction medium, a periodic mesoporous inorganic material was found to function as a "solid solvent" in a Diels-Alder reaction of C(60) with cyclopentadiene. This finding was supported by a concentration effect and a kinetic study of the reaction.
Creep of high-purity aluminum (5N Al) at room temperature and ultra-low strain rate was investigated by a high sensitive helicoid-spring specimen technique under conditions of constant and changing stress. Creep deformation consists of transient creep stages, and no secondary creep stage was observed. Li’s equation sh…
Dehydrating of nickel laterite is necessary when high magnesium laterite ores are treated by pyrometallurgical means. In this work, the Philippine nickel laterite was dehydrated and sintered simultaneously in a laboratory scale sintering apparatus. The original nickel laterite was characterised using thermogravimetric…
The theoretical bases of spectrophotometry used in analysis are discussed in the paper as well as the results of investigations of the montmorillonite content by means of the spectrophotometric adsorption of the Cu(II)-triethylenetetramine (Cu-TET) complex are presented. Bentonites originated from various producers (S…
In this paper we develop a Metropolis Monte Carlo algorithm capable of describing equilibrium statistics of semiflexible polymers of arbitrary stiffness and shape. By modelling the polymer as a discrete chain of links connecting vertices, we are able to efficiently calculate the position of all the vertices in the cha…
Steel welds representing three generations of pipeline steel were studied against hydrogen effect, using the fracture toughness parameter J integral which is a measure of the plastic work. The influence of hydrogen on the growth of a partial wall defect is studied and comparisons with the growth of the same defect in…
Preparation and properties of porous carbon material containing magnesium oxide Porous carbons loaded with magnesium oxide were prepared through one-step process. Poly(ethylene terephthalate) and natural magnesite were used as carbon source and MgO precursor, respectively. An impact of a temperature and relative amoun…
Vanadium oxide nanostructures were synthesized using NTP as a carrier through soft-chemical method. The influence of calcination temperature on the phase and morphology of obtained pristine product were characterized using X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and scanning electron microscopy (SE…
Perovskite-type sodium niobate, NaNbO3 was prepared by hydrothermal reaction using an amorphous hydrated niobium oxide (a-Nb2O5). A single phase of perovskite-type NaNbO3 was obtained under the condition of 160°C and 1.0 M NaOH solution, and at higher temperature (≥180°C) cubic shape particles with the size of 5–10 µm…
Silver nanoparticles were spontaneously formed on pristine and oxidized single-wall nanotubes. Nanoparticles were observed on carbon nanotubes with AFM, and the presence of Ag nanoparticles were confirmed by ESR experiments. Raman spectroscopy of the Ag-treated carbon nanotubes had a 4–10X enhancement of intensity com…
Broadband inelastic light scattering spectra of (1-x)(Na0.5Bi0.5)TiO3-xBaTiO3 single crystals are measured in the frequency range between 1 GHz and 20 THz to investigate the peculiar behavior of the polarization and the origin of diffusive dielectric anomaly. In the light scattering spectrum in the 1GHz–10 THz range,…
Automotive aluminum alloy sheet metal needs to improve the formability and the strength. In this study, the asymmetric rolling process was applied to the aluminum alloy sheet metal generation, because the {111}//ND texture, which corresponds to a part of the shear deformation texture, acts the high-formability. There…