Materials Literature
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Over the past years, research has attempted to relate fiber properties with yarn prop erties, and many regression equations have been developed to accomplish this. The complexities of multiple regression equations put limits on their universal acceptance. Neural networks with better nonlinear mapping have also been us…
The pressure inside an enclosed void in a solid dielectric is generally determined by calculation based on equating the measured partial discharge (PD) onset voltage and the breakdown voltage from the Paschen curve for a particular gas. Here it is assumed that the gas is known or that physical properties remain approx…
Abstract Switchable binary polymer brushes grafted to Si‐wafers were prepared from hydrophilic and hydrophobic polymer components. When exposed to solvents, either the hydrophobic or the hydrophilic component extends in to the liquid phase, depending on the polarity of the solvent. The hydrophilic component was poly‐2…
Abstract Summary: Controlled polymerization of styrene in toluene was achieved by atom transfer radical polymerization (ATRP) using hyperbranched polyglycidol‐supported multidentate amine ligands/Cu I Br catalyst systems. These catalyst systems with nanoscopic dimensions were more active than the corresponding low‐mol…
Single-crystalline wurtzite ZnS nanobelts were synthesized by the VPT process for the first time in the presence of Au catalyst on the Si substrates. Each ZnS nanobelt is fairly straight. The ZnS nanobelts are 50–100 µm in length, 150–600 nm in width and 3–10 in ratio of the width to the thickness. The crystalline dir…
x SnO–(100 – x ) P 2 O 5 glasses (0.30 ≤ x ≤ 0.75) were prepared under argon atmosphere. The Sn 2+ /Sn total ratio, determined by wet chemical analysis, varies from 90 to 99% depending on glass composition. Glass transition temperatures are very low, and no effect of Sn 4+ could be detected. Glass structure was charac…
Abstract A new class of thermosensitive polymers based on polyethers is discussed. Using living anionic polymerisation techniques a series of homo‐ and block copolymers of 2,3‐epoxypropanol‐1 (the glycidol), ethoxy ethyl glycidol ether, its hydrophobic derivative, and ethylene oxide of different molar masses and topol…
There are a number of studies that explain the metabolism and roles of metallic titanium and titaniumion. One of the most intriguing results from these studies is the finding of metallic titanium having no bacteriostatic effects on oral bacterial species. In this research, the effects of titanium-ion on the growth of…
Two sedimentary profiles, at 18 km and at 125 km from the Rhone River mouth were selected to study the steps of glauconitization inside green (glaucony) grains, in a temperate marine environment. The proximal site is characterized by a greater content of alpine minerals (chlorite, illite) than the distal one. In the p…
Abstract Summary: A new kind of aniline oligomer with a “dumbbell” shape was synthesized through a simple oxidative coupling reaction with a new rigid aromatic amine as starting material. The oligomer was characterized with mass spectrometry, IR and NMR spectroscopies. Its redox property was checked by cyclic voltamme…
In this work the temperature dependence of the extraordinary/ordinary refractive indices and the optical birefringence are determined near the reentrant isotropic–discotic nematic–isotropic phase transitions for a lyotropic mixture of potassium laurate, decanol and D2O. These parameters are related to the extraordinar…
Several pillared clays were prepared by using a polyalcohol (ethylene glycol or poly(vinyl alcohol)) or a poly(ethylene oxide) surfactant as an interlayer gallery template and an aluminum oligomer species as the pillaring agent. The use of polyalcohols or nonionic surfactants, such as Tergitol, gave materials which, i…
The nonlinear and anisotropic behavior of grain-oriented ferromagnetic materials enters numerical field computations via the reluctivity tensor. In this paper, an improved reluctivity tensor model is discussed. It is pointed out in which way this model is integrated in a Newton iterative solver. However, to retain the…
We have studied photoluminescence spectra in the band-edge emission region of very high quality undoped ZnO, as a function of both (i) sample growth methods and conditions, and (ii) measurement temperatures. As a result, we have classified the defect types responsible for emission peaks observed in the band-edge emiss…
Abstract A series of uniaxial tensile loading‐unloading tests are performed on injection‐molded isotactic polypropylene at room temperature. In each test, a specimen is stretched up to the maximal strain ϵ max = 0.12 with a constant strain rate, \documentclass{article}\pagestyle{empty}\begin{document}$ \dot \varepsilo…
The pyrolysis of PVC has been conducted in an inert atmosphere and the products distribution was studied. Gas, liquid and tar fractions were separated and analysed by GC-MS and FTIR. A large number of aromatic compounds and alkyl aromatic compounds were found in the liquid fractions. The results showed that the PVC th…
Gold nanoparticles (3.1-5.0 nm in size) surface-derivatized with both electroactive and nonelectroactive self-assembled monolayers were synthesized. The surface-derivatized electroactive particles can be easily oxidized/reduced at an electrode surface based on the diffusion-controlled current-voltage curve observed in…
Abstract The influences of mixing parameters on the carbon black dispersion can be characterized using the electrical conductivity online measured from internal mixer. As a measure for monitoring the development of carbon black dispersion, a normalized conductivity with regard to the conductivity measured at the BIT (…
ABSTRACT: Clay mineral analysis of Spodosols collected from the Adirondack Mountains reveals that smectite is common in the forest floor and uppermost soil horizons (the O, A and E horizons) and probably forms from the transformation of vermiculite via a low-charge vermiculite intermediate. The conversion of vermiculi…
Polycrystalline Fe3O4 films have been prepared by reactive sputtering at room temperature, which is much lower than the reported temperature of above 500 K to deposit high quality Fe3O4 films. Transmission electron microscopy image shows that uniform Fe3O4 grains are well separated by grain boundaries and their size i…