Materials Literature
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Article Indigo: Crystal structure refinement based on synchrotron data was published on November 1, 1988 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 184, issue 1-4).
Abstract Based upon the Doi-Edwards theory, a simple expression has been obtained for zero-shear viscosity in terms of the plateau modulus and the crossover frequency. There are no adjustable parameters in the expression. The model is in very good agreement with the zero-shear viscosity values for linear polybutadiene…
The eddy current loss under square-wave voltage excitation is theoretically and experimentally investigated. It is shown that the loss is smaller than under sinusoidal voltage excitation when the peak induction is the same. This decrease strongly depends on the behavior of domain structure.>
Cristallisation dans C 2 /c avec affinement jusqu'a 0,032. Alternance de plans (La-Cl) n et [La (SiO 4 )] n
Low-energy electron-diffraction fine-structure data can often have relatively large inconsistencies associated with the electron-beam incidence conditions. This is in part due to the difficulties associated with working with electrons in the range 0--40 eV and in part due to the crystal being oriented azimuthally befo…
The ramie degumming efficiencies of three auxiliaries, sodium pyrophosphate, sodium metasilicate, and sodium sulfite, have been studied using a quadratic orthogonal rotation experimental design. Sodium pyrophosphate performs the function of a major auxiliary, but it can be replaced and replenished by sodium metasilica…
Coercivity Hc( f ) and initial permeability χi( f ) of two kinds of ferromagnetic glasses, 2605S2 and VAC6030, have been measured as a function of frequency from 4 Hz to 2 kHz. Field annealing and stretching of samples have been used to define an easy axis along the longitudinal direction. Some samples were thinned to…
A rigorous theory for chemical shifts in crystal is developed. In this formalism, it is clearly seen that the shielding tensor is divided into a demagnetizing term and a microscopic term. The former is caused by the demagnetizing field and is proportional to the bulk susceptibility. The latter is caused by a periodic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAir temperature and humidity profiles in spray drying. 2. Experimental measurementsSpyridon E. Papadakis and C. Judson KingCite this: Ind. Eng. Chem. Res. 1988, 27, 11, 2116–2123Publication Date (Print):November 1, 1988Publication History Published online1 May 2002Published…
Abstract Polycaprolactone (PCL) crosslinked below the gel point either with peroxide or by exposure to ionizing radiation was compared by Theological studies. As a result of peroxide crosslinking, PCL increases in viscosity and shear rate dependence and exhibits increased dynamic moduli that converge at higher frequen…
For different compositions of the system Bi x Ge 20 Se 80- x with 5 ⩽ x ⩽ 40 at.% metallic and both gapless and normal semiconductor-conduction behaviours could be shown depending on x and conditions of treatment. The calculated activation energy seemed relatively small and decreased with more enriching with Bi. The o…
Abstract The direct polycondensation of terephthalic acid and p ‐phenylenediamine hydrochloride (PPD.2HCl) with thionyl chloride was found to be significantly promoted in N ‐methylpyrrolidone (NMP) by dissolved CaCl 2 and tertiary amines. The inherent viscosity of the polymer obtained varied with the amount of CaCl 2…
Material functions of two engineering plastics [a poly(phenylene ether) and a polycether imide)] were characterized, including the shear viscosity, first normal stress coeffkient, storage and loss moduli, growth and relaxation of shear stress, and first normal stress coeffkient and relaxation moduli. The oscillatory s…
Abstract The crystal structure of iodine/trans‐polyacetylene complexes (CHI y ) x ( y = 0,009, 0,035, 0,17 and 0,30) was investigated by X‐ray diffraction analysis of highly oriented samples. An iodine‐containing phase (PAI) was observed in all cases, accompanied by residual crystallinity due to pristine polyacetylene…
The densities of seven rare‐earth sesquioxides and yttrium sesquioxide were measured in the liquid state in the temperature range from melting point to ∼3200 K. An aerodynamic levitation technique and laser‐heating method were used. The variation of volume at fusion for these oxides was deduced from these results and…
S 2-alkoxyfluorene-7-carboxylic acid 4-(2-methylbutoxy)-phenyl ester and S 2-alkoxyfluorenone-7-carboxylic acid 4-(2-methylbutoxy)-phenyl ester were synthesized and the effects of mesogen modification or substitution of biphenyl with fluorene and fluorenone group in a mesogen core were studied to obtain a wide tempera…
A 2.25Cr - 1Mo - 0.1C welded steel having a microstructure described as "granular bainite" has been investigated using optical microscopy, electron microscopy and atom probe field ion microscopy. Granular bainite was found to consist of bainitic ferrite and retained austenite, but no cementite. Grains of ferrite are b…
A new series of cyano-substituted mesomorphic side chain polyacrylates has been synthesized. Optical observations, D.S.C. studies and X-ray diffraction on oriented samples show that all polymers possess a partially bilayer Sa d phase. The smectic period has been measured from which it is inferred that the molecular st…
Modified Strontium Barium Niobate (SBLLN) ceramics were prepared by the conventional oxide technique. The permittivities of thermally depoled SBLLN ceramics measured at 100 kHz are much smaller than that of intrinsic Sr0.75Ba0.25Nb2O6 crystal. The EP hysteresis loops of the materials are of the slim-loop type. Ceramic…
Abstract The rate of reaction between NO and HNO 3 and the rate of thermal decomposition of HNO 3 have been measured by FTIR spectroscopy. The measurements were made in a teflon lined batch reactor having a surface to volume ratio of 14 m −1 . During the experiments, with initial HNO 3 concentrations between 2 and 12…