Materials Literature
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The application of scaling laws to fiber composite laminates is discussed. Particular emphasis is placed on the case of impact loading. Scaling difficulties and conflicts are identified and illustrated in an experimental program based on impacted carbon-fiber composite beams. It is shown that the lay-up of laminates i…
Abstract An analysis of the Gordon‐Taylor equation shows that its background is based on additivity. The corresponding parameter K = ρ 1 Δα 2 / (ρ 2 Δα 1 ), however, may include also an interaction contribution if the quadratic concentration term is neglected in a virial‐like extension of the glass transition temperat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrisubstituted heteropolytungstates as soluble metal oxide analogues. 4. The synthesis and characterization of organic solvent-soluble (Bu4N)12H4P4W30Nb6O123 and (Bu4N)9P2W15Nb3O62 and solution spectroscopic and other evidence for the supported organometallic derivatives (Bu…
Abstract Near-infrared (NIR) reflectance spectra for mixtures of ordered kaolinite and ordered dickite have been found to simulate the spectral response of disordered kaolinite. The amount of octahedral vacancy disorder in nine disordered kaolinite samples was estimated by comparing the sample spectra to the spectra o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of fluorine-containing aromatic polybenzoxazoles from bis(o-aminophenols) and aromatic diacid chlorides by the silylation methodYutaka Maruyama, Yoshiyuki Oishi, Masaaki Kakimoto, and Yoshio ImaiCite this: Macromolecules 1988, 21, 8, 2305–2309Publica…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic SOx abatement: the role of magnesium aluminate spinel in the removal of SOx from fluid catalytic cracking (FCC) flue gasAlak A. Bhattacharyya, Gerald M. Woltermann, Jin S. Yoo, John A. Karch, and William E. CormierCite this: Ind. Eng. Chem. Res. 1988, 27, 8, 1356–1…
The empirical database of Villars and Calvert on the structures of pseudobinary and ternary phases is ordered within a limited number of two dimensional plots by using the recently proposed Mendeleev number M, which takes a unique value for each element in the periodic table. The pseudobinaries are characterised by av…
The work presents an analysis and comparative evaluation of different methods used for the numerical solution of heat conduction with phase change problems. Both freezing (melting) water as well as solidifying liquid metal problems are examined. Emphasis is placed on weak formulations as they tend to be simple to prog…
Stability constants for the formation of Fe(III)-S(IV) complexes at µ = 0.4 M were determined spectroscopically. Values of K_1 = 10^(6.6) M^(-1) for Fe^(3+) + SO_3^(2-) ⇌ FeSO_3^+ and K_4 = 10^(7.3) M^(-1) for FeOH^(2+) + SO_3^(2-) ⇌ HOFeSO_3 were obtained. Raman measurements indicate that sulfite binds to the metal t…
The contributions of nonlinear fracture processes both in the microcracking frontal process zone and in the following wake region and of grain bridging to crack‐growth resistance parameters are discussed in terms of the R‐curve behavior of an isotropic polycrystalline graphite. The R‐curve behavior of the graphite is…
A detailed analysis is given on the energetics of bubble growth in a solid by prismatic loop punching. Interactions between the bubble and the dislocation loop are included as well as the effect of the loop proximity on the actual bubble volume. It is shown that there exists an attraction between bubble and loop and t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalytic photochemical oxidation of organic substrates by polyoxometalates. Picosecond spectroscopy, photochemistry, and structural properties of charge-transfer complexes between heteropolytungstic acids and dipolar organic compoundsCraig L. Hill, Donald A. Bouchard, Mirya…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of mesophase transitions in thermotropic copolyesters. 1. Calorimetric studyStephen Z. D. ChengCite this: Macromolecules 1988, 21, 8, 2475–2484Publication Date (Print):August 1, 1988Publication History Published online1 May 2002Published inissue 1 August 1988https:/…
Several methods have been developed which derive the orientation distribution (ODF) in a polycrystalline sample from pole figures measured by X-ray or neutron diffraction techniques. The theoretical backgrounds of the conventional harmonic method, of the vector method and of the method of Williams [J. Appl. Phys. (196…
Abstract Chromate (CrO 4 2− ) adsorption was investigated on kaolinite (0.2–2 μ m) saturated with NaClO 4 over a range of pH. Adsorption increased with decreasing pH because of protonation of chromate and/or variable charge sites on kaolinite. Chemical pretreatment to remove noncrystalline and crystalline oxide contam…
A macroscopic shape memory effect is demonstrated by first deforming a CeO 2 ‐stabilized tetragonal zirconia polycrystal (Ce‐TZP) between the M b and A s temperatures and then recovering the shape change by heating above A b . Shape changes effected above A b are immediately recoverable during unloading, giving rise t…
Recent interest has been shown in the utilization of electrochemical noise as a method for the investigation of corrosion reactions. Studies of potential fluctuations under open‐circuit conditions indicate that the r.m.s. amplitude, or standard deviation, of the noise is related to the corrosion rate as calculated fro…
We used a molecular modeling approach to search for a conformation of docosahexaenoic acid (DHA) that might uniquely influence acyl chain packing in cell membranes. Studies of DHA models containing six cis double bonds and five intervening methylene groups identified two conformations of special interest. Both had nea…
Two constitutive acetoacetyl-CoA (AcAc-CoA) reductases were purified from Alcaligenes eutrophus. Incorporation of [1-14C]-acetyl-CoA into poly-3-hydroxybutyrate (PHB) by systems reconstituted from purified preparations of either 3-ketothiolase, AcAc-CoA reductase and PHB synthase, occurred only when NADPH-AcAc-CoA red…
A new design for an infrared cell useful for studies of the spectrum of surface species on high area solids is presented. The cell is well suited over a wide temperature range (100–1000 K). Other demonstrated features of the cell include ultrahigh-vacuum operation, temperature control to ±1 K, linear and rapid tempera…