Materials Literature
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Petrochemical, shortages have stirred renewed interest in cellulose because it is the single replaceable raw material, and exists in great abundance. This literature survey reviews the cellulose solvent systems that do not in general rely on stable cellulose derivatives that can be isolated. This review is arranged in…
Subsolidus phase relations were established in the system Si 3 N 4 ‐SiO 2 ‐Y 2 O 3 . Four ternary compounds were confirmed, with compositions of Y 4 Si 2 O 7 N 2 , Y 2 Si 3 O 3 N 4 , YSiO 2 N, and Y 10 (SiO 4 ) 6 N 2 . The eutectic in the triangle Si 3 N 4 ‐Y 2 Si 2 O 7 ‐Y 10 (SiO 4 ) 6 N 2 melts at 1500°C and that in…
Isometric tensions developed in connective tissue under the influence of temperature have previously been measured by their effect on a "shrinkage" phenomenon observed along the main axis of the collagen fibers. A new device, built and tested in our laboratory enabled us to obtain isometric tension curves by measuring…
Abstract At temperatures above that required for gelatinization, an order‐disorder transition is observed for wheat, maize, waxy maize and potato starches. This transition is the melting of the crystallites in the granules. A second, higher temperature, transition occurs in wheat and maize starches. This also appears…
Plastic deformation was studied in fine‐grained alumina polycrystals (grain sizes 1 to 5 μm); several deformation mechanisms occur simultaneously. This paper is concerned with basal slip and unaccommodated grain‐boundary sliding (GBS). The basal slip can give rise to a deformation texture. Cavitation occurs due to the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of Segmented Poly(urethaneureas) Based on 2,4-Toluene Diisocyanate. 1. Thermal Transitions, X-ray Studies, and Comparison with Segmented Poly(urethanes)C. S. Paik Sung, C. B. Hu, and C. S. WuCite this: Macromolecules 1980, 13, 1, 111–116Publication Date (Print):Ja…
The pore structure of a fibrous carbon molecular sieve has been studied by adsorption of CO2, O2, C2H2, H2, N2, CO, Xe and SF6 as molecular probes. Apart from the negligible outer surface of the fibres, all adsorption sites posses molecular sieving properties. Mild activation steps enable the graduated opening of crit…
[N,P,T] Monte Carlo simulations of metastable supercooled-liquid and amorphous phases of Lennard-Jones atoms indicate several distinct signatures for identifying the glass transition boundary; i.e., the density, enthalpy, and pair distribution function dependences on temperature and pressure are different for the two…
Conference International Symposium on Photochemistry, International Symposium on Photochemistry, PHOTO, Photochemistry, Eighth, Seefeld, Austria, 1980-07-13–1980-07-19 Published Online: 2009-01-01 Published in Print: 1980-01-01 © 2013 Walter de Gruyter GmbH, Berlin/Boston
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon and electron transport in stable, electroactive tetrathiafulvalene polymer coated electrodesF. B. Kaufman, A. H. Schroeder, E. M. Engler, S. R. Kramer, and J. Q. ChambersCite this: J. Am. Chem. Soc. 1980, 102, 2, 483–488Publication Date (Print):January 1, 1980Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectra of copper(III) complexesDennis G. Brown and Ulrich WeserCite this: Inorg. Chem. 1980, 19, 1, 264–266Publication Date (Print):January 1, 1980Publication History Published online1 May 2002Published inissue 1 January 1980https://pubs.acs.org/doi/10.1…
Research Article| October 01, 1980 Rb-Sr glauconite isochron of the Eocene Castle Hayne Limestone, North Carolina W. BURLEIGH HARRIS; W. BURLEIGH HARRIS 1Department of Earth Sciences, University of North Carolina at Wilmington, Wilmington, North Carolina 28403 Search for other works by this author on: GSW Google Schol…
At room temperature the background of X-ray single-crystal photographs exhibits diffuse streaks along the line Δ from Γ to X and less sharp diffuse domains in the directions Σ. The streaks are explained by a soft rotary phonon A2(Δ) corresponding to an in-phase rotation of the octahedra in a plane. The displacements o…
Infrared and 13C and 1H n.m.r. data for the complexes [M2(cp)2(CO)3(CNR)][cp =η-C5H5, M = Fe, R = Me, C2H5, CH(CH3)2, C(CH3)3, or Ph; M = Ru, R = Me, C2H5, CH(CH3)2, or C(CH3)3] show that, in solution, mixtures of isomers containing bridging and terminal isonitrile ligands exist; the n.m.r. results may be interpreted…
In this study the viscosity Bη coefficient and the ionic partial molar volume of the borate ion in aqueous solutions have been determined at 25 and 45°C. These properties, together with data reported for the borate mobility, the borate–cation interactions and the formation entropy of the borate ion in aqueous solution…
Through studies of the photodegradation of commercial polymers and their model compounds, the roles of ketone carbonyl and hydroperoxide functional groups in the overall photodegradation mechanism have been elucidated. Besides undergoing photochemical reaction themselves, polymeric ketones are capable of sensitizing t…
The phases present in an as-cast commercial nickel-aluminium bronze of nominal composition Cu-10Al-5Ni-5Fe have been characterized by optical and electronoptical techniques. Phase distributions andprecipitate morphologies have been studied by optical microscopy, scanning electron microscopy, and transmission electron…
A neutron diffraction study of cubic CsPbX3 (X = Cl or Br) has been carried out over the temperature ranges 325-623 K for CsPbCl3 and 408-673 K for CsPbBr3. The temperature factors for the perovskite structure were derived following the method of Matsubara [Prog. Theor. Phys. (1975), 53, 1210-1211] which includes the…
Abstract The electrical conductivity and the thermoelectric power of boron carbide are investigated in the temperature range from 80 to 700 K on samples of compositions between B 12.94 C 2.06 and B 10.59 C 4.41 . While the extrinsic thermal activation of free carriers dominates the electronic transport at high tempera…
The heat capacity of butyloxybenzylidene octylaniline has been measured from 0° to 95 °C. Significant pretransitional effects are observed near both the first-order transition from the normal rigid crystal to the B phase plastic crystal and the first-order melting transition from the B phase to the smectic-A liquid cr…