Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-Liquid Phase Separation and Oriented Growth of Poly(aryl ether ether ketone) on Friction-Transferred Poly(tetrafluoroethylene) SubstratesP. Damman, C. Fougnies, M. Dosiere, and J. C. WittmannCite this: Macromolecules 1995, 28, 24, 8272–8276Publication Date (Print):Nov…
Abstract A few high-temperature sulphate phases are both plastic crystals and solid electrolytes, the latter because the hindered rotational motion of the sulphate ions enhances the mobility of the cations. This interpretation has been called the paddle-wheel model, and it is obvious that cation migration becomes a mu…
In comparison with the Fast Flux Test Facility Type 316 stainless steel driver design, six test assemblies employing D9 alloy in place of stainless steel for duct, cladding, and wire wrap material were irradiated to demonstrate the improved performance and lifetime capability of an advanced D9 alloy driver design. A s…
Abstract The effect of FEF carbon black as filler on the thermal capacity c , diffusivity a , and thermal conductivity λ, of styrene butadiene rubber (SBR) composites in the temperature range 300–420 K was studied. The filler strongly increases the thermal diffusivity, whilst strongly decreasing the thermal capacity a…
Water proton 1/T1 nuclear magnetic relaxation dispersion (NMRD) profiles were measured for a water-soluble gadolinium(III) texaphyrin (Gd-tex) complex as a function of temperature and in the presence and absence of 5% human serum albumin (HSA). Upon dissolving the complex in water (0.259 mM), the water relaxivity valu…
A new instrument for spot profile analysis of reflection high-energy electron diffraction (SPA-RHEED) has been developed. The system works either in the conventional mode with a fluorescent screen or in the new high-resolution mode with a channeltron for the registration of the diffraction pattern. The unique properti…
New cyclophosphazene derivatives incorporating five different mesogenic moieties have been synthesized and their liquid crystalline behaviour has been studied by DSC and polarizing optical microscopy. Smectic A and unclassified smectic 1 phases have been found for the first time in these cyclotriphosphazene derivative…
Gas separation membranes can be physically or chemically modified to improve their separation characteristics. The ability of bromine to form charge-transfer complexes with unpaired electrons along a polymer backbone was utilized to tailor the gas separation properties of a polysulfone membrane. It was hypothesized th…
Recrystallisation in commercial purity aluminium following different strain paths has been investigated. The deformation was carried out using torsion, compression, fully reversed torsion, and torsion followed by compression along the torsion axis, the latter combination giving an orthogonal change in straining state.…
Nylon 6 film quenched from the molten state into liquid nitrogen exhibits an electric displacement vs electric field hysteresis loop at room temperature with the remanent polarization of 26 mC/m 2 , as well as an exothermic anomaly around 340 K in the specific heat due to the heating process, which is attributed to th…
Radiation-induced precipitates on dislocation loops in low and high purity Fe-9, -18 and -50 % Cr alloys were examined under electron irradiation in a high voltage electron microscope operated at 1 MV. Two types of dislocation loops on {100} planes with a <100> Burgers vectors and on {111} planes with a /2<111> are fo…
Abstract This paper examines the use of selected solvents in degreasing, cold cleaning and spot cleaning applications in the aerospace industry, with emphasis on Federal facility operations. Research referenced in this paper is drawn from aerospace industry participants and from research conducted under the Strategic…
The objective of the work reported here was to characterize the tarnish products formed on copper during the early stages of exposure to moist air with trace levels of pollutant gas, in particular hydrogen sulfide and sulfur dioxide/hydrogen sulfide. As determined by x‐ray photoelectron spectroscopy and coulometric re…
A modified split Hopkinson torsional bar (SHTB) is introduced to eliminate the effect of the loading reverberation of the standard SHTB on the study of evolution of shear localization. The effect, the cause and the method by which to eliminate loading wave reverberation are carefully analysed and discussed. By means o…
Ferroelectric PZT thin films were fabricated by metal-organic decomposition (MOD) onto Pt/Ti/SiO2/Si substrates. Different metals (i.e., noble metals: Pt, Ag, and non-noble metals: Al, Cr, In) were selected for top electrodes on PZT thin films. Capacitors with noble metals as top electrodes exhibited symmetric P-E hys…
The low-temperature phase transitions of ${\mathrm{LiK}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Rb}}_{\mathit{x}}$${\mathrm{SO}}_{4}$ mixed crystals have been studied by Raman spectroscopy (x=0.10 and 0.50) and birefringence measurements (x=0.10, 0.20, and 0.50). The mixed compounds with low Rb concentration u…
A recently developed spectroscopic technique was used to determine oxygen diffusion coefficients as a function of temperature for polystyrene and polycarbonate films. Data were recorded at total pressures <300 Torr over the temperature range 5–45 °C under conditions in which argon, helium, and nitrogen, respectivel…
Mandarins were coated with SemperfreshTM and JonfreshTM edible coatings. the weight gain of mandarins after application of Jonfresh and Semperfresh coatings was 0.8% and 0.6% respectively. Weight loss, respiration rate, ascorbic acid, soluble solids (brix) and acidity changes of coated mandarins were compared with unc…
Abstract Callicladol, a novel brominated metabolite has been isolated from Laurencia calliclada Masuda sp. ined., a Vietnamese species of the red algal genus Laurencia. Its structure was deduced from spectral and chemical evidence.
A method is proposed for the solution of the phase problem at very low resolution for macromolecules. It generates randomly a very large number of models, each consisting of a few (two to ten) pseudo-atoms. The corresponding amplitudes are used for selecting a subset of 'best' models by choosing those with the highest…