Materials Literature
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The effect of uniaxial orientational drawing and isometric annealing on the ratio of polymorphic modifications in the crystalline phase of poly(vinylidene fluoride) is studied. The role of drawing temperature and draw ratio in the structural rearrangements during polymer deformation is analyzed. The conditions providi…
A novel ceramic-metal composite with continuous interconnected ceramic and metal phases has been fabricated from sintered porous particulate AlN preforms infiltrated with magnesium. The 48 vol. % AlN composites are fabricated by pressureless infiltration in argon in the temperature range of 870 °C to 960 °C. An increa…
Abstract In this work we investigated ZnO films grown on semi‐insulating (100) GaAs substrates by pulsed laser deposition. Samples were studied using techniques including X‐ray diffraction (XRD), scanning electron microscopy, atomic force microscopy, Raman spectroscopy, temperature dependent photoluminescence, C‐V pro…
Clothin g protec ts from cold or heat to ma in ta in body thermal comron throu ghout th e full range of human activit ies. Var ious typ es of tac tile . moisture and thermal interac tion s be tween the clothing ma te rial and the human skin determine th e comfo rt leve l of a perso n at a given enviro nm enta l condi…
ABSTRACT In dry‐grind processing to produce ethanol from corn, unfermented solids are removed from ethanol by distillation and dried to produce distillers dried grains with solubles (DDGS), an animal food. Fouling of thin stillage evaporators has been identified as an important energy consumption issue in dry‐grind fa…
In this work, Ag–SiO2 nanocomposite layers were synthesized by introducing Ag nanoclusters into thermally oxidized SiO2 layers, using ion implantation. The field-emission (FE) properties of these layers were studied and correlated with the results from atomic force microscopy and transmission electron microscopy measu…
The final morphology of liquid metallic emulsions, produced in a temperature gradient, depends on the interfacial gradient force acting on small metallic droplets. This force is proportional to the temperature coefficient of the interfacial energy between the two immiscible liquid phases. In the present paper first a…
Covers advancements in spacecraft and tactical and strategic missile systems, including subsystem design and application, mission design and analysis, materials and structures, developments in space sciences, space processing and manufacturing, space operations, and applications of space technologies to other fields.
Bulk ceramic samples of (La 0.7 Sr 0.3 )(Mn 1 − x Cu x )O 3 ± δ manganites are prepared by solid-state reactions. The unit-cell parameters and Mn-O bond distances in the manganites are determined using the Rietveld profile analysis method, and their magnetic properties are studied with the use of ferromagnetic resonan…
Glycolipids are amphotropic liquid crystals forming lyotropic liquid crystals in aqueous solutions and thermotropic liquid crystals in their dry form. We report studies on the thermotropic properties of seven different neat glycolipids: four maltoside, two glucoside and one pyranoside lipids. Optical birefringence, el…
In earlier parts of the series, we investigated the influence of the woven and weft knitted fabric structures on their frictional characteristics, and then defined new indices as the fabric—structural—asperity index (FSAI). In this paper, we have developed this index for warp-knitted fabric structures, to explain the…
Abstract Summary: Cationic gelators, capable of gelling alcohols, were developed as structure‐directing agents for preparing metal oxides. The sol‐gel polymerization of metal alkoxides using the gelators as templates afforded metal oxide nanotubes. The unique structure of metal oxides was created by transferring the s…
Development of polymorph control procedures for PF00287586 and AG035029 is described herein. For PF00287586, investigations were undertaken to control formation of both identified polymorphs, Form A and Form B. Solvent screening methodology was employed to find a solvent system that inhibited the solvent-mediated tran…
Abstract Synthetic precipitated amorphous white silica nanofiller was used to reinforce and crosslink styrene-butadiene rubber (SBR). The silica surfaces were pre-treated with bis[3-triethoxysilylpropyl-)tetrasulfide (TESPT) bifunctional organosilane. TESPT chemically adheres silica to rubber and also prevents silica…
The kinetics of base-catalyzed hydrolysis of 4-nitrophenyl acetate was studied in water and water-ethanol mixtures under ultrasound (21.1 kHz) using a probe equipped with a quartz horn and, by comparison, without sonication. The ethanol concentration was varied from 0 to 50 wt % and pH from 7.5 to 9. The increase of r…
A new particle‐ and resin‐free system composed of transparent, binary single crystals entangled with each other continuously has been successfully developed for a light source for illumination. These single crystals exist in a semi‐coherent state like a block copolymer; one of these single crystals exhibits effective…
According to the theory of light scattering by small randomly oriented particles, the intensity ratio I VH/I VV cannot exceed 1/3 (van de Hulst, 1957; Kerker, 1969; the subscripts V and H denote the vertical and horizontal polarizations with respect to the scattering plane). In this paper, it is shown that this statem…
Nanocomposites of polypropylene (PP) and vermiculite (VMT) were successfully prepared by solid-state shear compounding (S3C) using pan-mill equipment without any compatibilizer. The structure and morphology of nanocomposites were determined by X-ray diffraction and scanning and transmission electron microscopy techniq…
CdS nanoparticles with different sizes ranging from 2.5 nm to 300 nm and nanorods with aspect ratio -32 were synthesized by simple solvothermal process with a view to explore the effect of size and shape on the optical properties of these nanoforms. Solvent, temperature and the Cd source played important role in deter…
The objective of this study (Part II) paper is to develop a dry actuator for wider application than the wet actuator. To form a dry actuator, a carbon nanofiber (CNF) actuator is based on a solid polymer electrolyte (SPE). The SPE film is prepared from polymethyl methacrylate (PMMA), an ion-exchange material, a plasti…