Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Photoinduced nonlinear optical phenomena in Sb2Te3–CaCl2–PbCl2 glasses have been studied by experimental and theoretical quantum chemistry and molecular dynamics methods. Additionally, photoinduced two-photon absorption (TPA) and second-harmonic generation (SHG) were measured in the IR region from 5.8 to 18 µm. A CO l…
The aim of this study is to investigate the water (moisture vapor and liquid) transfer properties of two‐layer weft knitted fabric and some related factors. Some experimental fabrics with specific yarns and stitch densities were prepared. Water vapor permeability rate through the fabrics and liquid water transfer from…
Hydrothermal recycling is conversion of poly(vinyl chloride) (PVC) at high temperatures in a steam atmosphere into hydrogen chloride, a mixture of hydrocarbons and syngas. Hydrochloric acid can be recovered and the mixture of hydrocarbons and syngas can be used for energy recovery. A bench-scale bubbling fluidized bed…
The generation of high pretilt angles in nematic liquid crystal (LC), 4-n-pentyl-4-cyanobiphenyl (5CB), on the rubbed surface of polyimide (PI) containing trifluoromethyl moieties, was investigated. High pretilt angles of 5CB are strongly related to the low surface energy caused more by the existence of trifluoromethy…
Sixteen agricultural waste products were subjected to pyrolysis at 550°C under a nitrogen atmosphere. The precursors which were treated in this manner were fruit stones and nut shells (peach, apricot and olive stones; date pits, almond, hazel nut and pistacio shells), fibrous materials (sugar cane bagasse, date palm b…
Differential scanning calorimetry (DSC) was used to determine the transition temperature ranges (TTR) of four types of super-elastic orthodontic nickel-titanium coil springs (Sentalloy). A knowledge of the TTR provides information on the temperature at which a NiTi wire or spring can assume superelastic properties and…
The film rupture behaviour of dynamically strained metastable Ti-15wt% Mo-3wt% Nb-3wt% Al in the solution-treated and aged (STA) (β + α) condition that is prone to coplanar slip was examined. Film rupture was detected by rapid data acquisition (10 000 Hz, 40 nA resolution) of repassivation current transients on fatigu…
The controlled radical polymerization of butadiene initiated with 2,2′-azoisobutyronitrile (AIBN) and in the presence of 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) is presented. The produced oligomers which have number average degrees of polymerization ranging between 3 and 12 were characterized by NMR. This led to…
Post-weld heat treatment (PWHT) procedures and heat input during welding of 17–4PH stainless steel, using matching chemistry consumables, have been optimised in relation to its microstructural condition before welding based on room temperature tensile properties. The 17–4PH stainless steel was welded in two different…
A series of P=S-containing dendrimers (starburst macromolecules) were characterized by X-ray photoelectron spectroscopy (XPS). This technique is a unique tool for the identification of specific groups from these starbursts such as P=S, aromatic rings, C–O, and C=O. Surface elemental and chemical composition is found t…
The influence of a polymer network, stabilizing an initial texture of horizontal chevron geometry, on the in-plane smectic C* layer reorientation process is studied for different applied electric field conditions. As expected, the reorientation of smectic layers is strongly slowed down and eventually suppressed by the…
In order to study the mechanism of DC offset voltage generation in a hybrid-aligned nematic liquid crystal display (HAN-LCD), we theoretically and experimentally studied the electrooptic characteristics of a HAN sample. The results showed that decreasing the thickness of a LC alignment film strongly reduces the genera…
Abstract We demonstrate control over the orientation of the 4,4′‐bis(2,3‐epoxypropoxy)‐α‐methylstilbene (EPAMS)/sulfanilamide (SAA) epoxy system. A statistical experimental design was generated and analyzed to determine the effects of the time in the magnetic field, field strength, and the amount of B‐staging. A regre…
Chiral-nematic glassy liquid crystals (GLCs) are of interest because of their unique supramolecular structure and associated optical properties. However, the constant-pitch films produced so far have a bandwidth limited to less than 100 nm in the visible. The introduction of a pitch gradient, indicated by theory to in…
In this study, the microstructure of injection-molded polypropylene reinforced with cellulose fiber was investigated. Scanning electron microscopy of the fracture surfaces and X-ray diffraction were used to investigate fiber orientation. The polypropylene matrix was removed by solvent extraction, and the lengths of th…
Abstract The effect of coupling agents and filler particle size on melt rheology of poly(phenylene sulfide)‐bonded neodymium‐iron‐boron (Nd‐Fe‐B) alloy magnets was studied with oscillatory flow experiments to accelerate efforts to optimize their processing. The minimum viscosity of the polymer‐bonded magnets near 290°…
Trinuclear CuIIPtCuII complexes (see scheme) are formed with four bridging 1-methylcytosinate nucleobases. These compounds are diamagnetic as a result of the strong exchange interaction (J≅1000 cm−1 (2 b)), despite a separation of approximately 5 Å between the CuII centers.
The microstructure, crystal phase, electrical conductivity, and mechanical strength of less than 7‐mol%‐Sc 2 O 3 ‐doped zirconia ceramics fabricated by comparatively low‐temperature sintering at 1200–1300°C for 1 h were investigated. Zirconia ceramics having a uniform microstructure (grain size < 0.5 μm) stabilized…
Polyaniline (PA) and aniline black (AB) were prepared in powder form by the chemical method of oxidative polymerization, from which free-standing thin films were obtained by solvent evaporation using N-methyl pyrrolidinone ( NMP ). The thin films contained 2, 4, 6 or 8 wt% AB. Electrical measurements showed that the s…
A review of the requirements for collecting X-ray diffraction data from protein crystals is given, with an emphasis on the properties of the crystal and its diffraction pattern. The size, unit-cell dimensions and perfection of the crystals can all be related to the required size and divergence of the incident X-ray be…