Materials Literature
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Abstract A program of simultaneous linear equations has been developed to calculate component proportions and/or component property values for mineral mixtures in soil clays and sediments. The analysis is based on quantitatively measured chemical and physical properties of samples and involves (1) qualitative identifi…
An accurate electron energy loss formula, modified from that of F. Rohrlich and B.C. Carls (1954), is presented which is useful in the energy range from a few tens of electron volts to 10 keV. Higher order z 3 corrections, which are similar to those for heavy charged particles, and z 2 corrections, defined as deviatio…
Abstract The effect of fiber structure and morphology on the resultant mechanical and low load deformation properties of thermally bonded nonwoven polypropylene fabrics has been studied. Commercially available staple polypropylene fibers varying in linear density and draw ratio (Herculon and Marvess staple fibers) wer…
Four‐point flexure tests were performed at 1100° to 1350°C on two hot‐pressed silicon nitrides, one in which the grain‐boundary phase was amorphous and one in which it was largely crystalline. Fracture stress and relative K 1c were plotted vs temperature. Fracture regions were analyzed by scanning and transmission ele…
The morphology, crystallography, and chemistry of phases present in an as-cast commercial aluminium bronze containing iron, of nominal composition (wt-%) Cu–10Al–2·5Fe (BS 1400: AB1), and the development of microstructure on cooling from elevated temperatures, have been studied using optical and electron microscopic t…
Abstract The reaction of poly(vinylidene fluoride) with several different bases in dimethylformamide solution yields dehydrofluorinated products with conjugated polyene structures. The extent of elimination can be controlled by varying the amount of added base. The structural properties of dehydrofluorinated materials…
Novel procedures were developed to determine the composition of magnesian calcite overgrowths precipitated on calcite crystals from seawater solutions. A surface sensitive analytical technique, Scanning Auger Microanalysis (SAM), was used to determine the composition of very thin overgrowths (< 0.5 ..mu..m) which coul…
To cover a large number of possible high-temperature reactor applications in the Federal Republic of Germany, the fuel element is designed to be uniform and acceptable for conditions set by different approaches for various plants following the thorium high-temperature reactor (THTR). To minimize fission product releas…
Conference Article| April 01 1985 Cellulose hydrolysis: the potential, the problems and relevant research at Galway MICHAEL P. COUGHLAN MICHAEL P. COUGHLAN 1Department of Biochemistry, University College, Galway, Ireland Search for other works by this author on: This Site PubMed Google Scholar Biochem Soc Trans (1985)…
Abstract Blending is an effective method for improving polymer properties. However, the problem of phase separation often occurs due to incompatibility of homopolymers, which deteriorates the physical properties of polyblends. In this study, isotactic polypropylene was blended with low‐density polyethylene. Crosslinki…
Abstract Polyaromatic ether–ketones and polyaromatic ether–keto–sulfones were sulfonated by suspending the polymer powders in dichloroethane containing liquid sulfur tiroxide and trialkyl phosphate at room temperature. It was found that more than one sulfonic group can be introduced per each repeating unit of the poly…
Experimental and modelling studies from the literature on vitreous silica have shown anomalous differences in the position of the maximum in the Si-O-Si bond angle distribution. A careful review of a purported refinement of experimental data indicates that the maximum at α=144° reported by Mozzi and Warren (1969) is,…
The semi-empirical model of Griessen and Driessen (1984) which relates the heat of formation Delta H of a metal hydride to the difference of the Fermi energy E F and the centre E s of the s band of the host metal, is used to calculate the volume expansion accompanying hydrogen uptake by a metal. The values obtained fr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTc-Ni8(SCH2COOEt)16, a receptive octagonal toroidIan G. Dance, Marcia L. Scudder, and Rodney SecombCite this: Inorg. Chem. 1985, 24, 8, 1201–1208Publication Date (Print):April 1, 1985Publication History Published online1 May 2002Published inissue 1 April 1985https://pubs.acs.…
Abstract Measurements of permeability and diffusivity have been undertaken for the gases helium and oxygen in a range of highly oriented polyethylene films. The solubilities deduced for both gases are proportional to the amorphous volume fraction, showing that the noncrystalline regions are the transport medium in all…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, structure, and fluxional behavior of 7-coordinate complexes: TpMo(CO)3X (X = H, Br, I; Tp = hydridotripyrazolylborato)M. David Curtis and Kom Bei ShiuCite this: Inorg. Chem. 1985, 24, 8, 1213–1218Publication Date (Print):April 1, 1985Publication History Published…
The effect of surface layer reinforcement with glass fibres of unidirectional jute-rein forced epoxy composite on the flexural properties has been investigated. Substantial increase in flexural modulus and strength with small amounts of reinforcement (for reinforcement ratio (t/d) < 0.3, where "t" and "d" are the r…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMesophase formation and chain rigidity in cellulose and derivatives. 4. Cellulose in N,N-dimethylacetamide-lithium chlorideEstella Bianchi, Alberto Ciferri, G. Conio, Alessandro Cosani, and M. TerbojevichCite this: Macromolecules 1985, 18, 4, 646–650Publication Date (Print):…
First we demonstrate that the extended mean-field model suggested by Huang and Viner is necessary and sufficient to describe the nature of the smectic-A--smectic-C (or --chiral-smectic-C) transition. The rest of the expansion terms in the mean-field free energy can be treated as higher-order correction terms. Then a g…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTManganese(III)-mediated spirodilactonizationWilliam E. Fristad and Susan S. HershbergerCite this: J. Org. Chem. 1985, 50, 7, 1026–1031Publication Date (Print):April 1, 1985Publication History Published online1 May 2002Published inissue 1 April 1985https://pubs.acs.org/doi/10…