Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGrowth Rates of Aluminum Potassium Sulfate Crystals in Aqueous SolutionsG. D. Botsaris and E. G. Denk Jr.Cite this: Ind. Eng. Chem. Fundamen. 1970, 9, 2, 276–283Publication Date (Print):May 1, 1970Publication History Published online1 May 2002Published inissue 1 May 1970http…
Glasses containing 50 to 75 mol% SiO 2 and up to 35 mol% ZnO were studied using thermal expansion, density, molar volume, refractive index, molar refractivity, internal friction, and infrared absorption data. Increasing the zinc oxide content in the glasses decreased the thermal expansion and increased the density, re…
The angular intensity variation of elastically scattered electrons expelled from various shells in a NaCl crystal by Mg Kα and Al Kα radiation is reported. A discussion of some prominent features of the experimental results is presented.
Abstract The higher alkyl polyglucosides are a new class of nonionic surfactants which can be formulated to give properties ranging from soft greases to hard glassy water‐soluble solids melting from about 30 C to above 300 C and which are insoluble in common organic solvents. The aqueous solutions do not exhibit inver…
The critical field required to induce this transition in Fe-Rh alloys close to the equiatomic composition has been measured using pulsed magnetic fields up to 280 kOe. Measurements of the thermal expansion and high field magnetization have also been carried out. It is found that application of Kittel's theory of excha…
Experimental solubility runs using magnesite from Red Mountain (California) and Snarum (Norway), experimental results, geologic applications, stability relations, kinetic factors
Comparison is made between the electrical and thermal conductivities of solids and the transport properties of gases, with special reference to boundary limiting effects. The transition from continuum to molecular behaviour of gases is explored using a modified mean free path. Relative intermolecular and boundary coll…
Theoretical expressions derived previously for molecular size distributions in multichain polymers are applied to binary silicate melts. The treatment is an extension of a previous approach which was limited to the consideration of linear chains. When all configurations of the chain molecules are taken into considerat…
It is suggested that there may be three types of nematic phases: the skewed cybotactic phase, in which the molecules are arranged in groups in such a way that the centers of the molecules in each group lie in a plane making an angle α (significantly different from 90°) with the mean direction of the molecules in that…
An analysis is given of the collapse of a spherical cavity in a large body of an incompressible viscoelastic liquid. Proceeding from a linear rheological model for the liquid, one obtains a nonlinear integro-differential equation for the motion of the cavity. Analytical solutions are derived for certain limiting value…
1. The absorption spectra of deutero- and proto-ferrihaem in aqueous solution at 25 degrees C show marked changes with concentration and pH in the Soret band region. Quantitative studies of these phenomena imply that they are associated with ferrihaem dimerization and with protolytic equilibria involving monomeric (M)…
Rate-dependent constitutive relations for single crystals are derived in terms of dislocation dynamics. Contributions from slip on the individual glide planes are assumed to superpose linearly to give the total plastic strain. As an application of the theory, equations describing elastic precursor decay are developed…
An attempt is made to differentiate between the three previously proposed models of the structure of tetragonal BaTiO3. In the new model, the serious parameter-interaction problem was avoided by the use of both neutron and X-ray diffraction data collected from c-domain single crystals. The result of the refinement gav…
The core lines and valence bands of LiF, BeO, BN and graphite have been studied by the ESCA technique. The energy differences between inner levels and valence bands are compared with X-ray transition energies. The changes in binding energy for the Bel s level when going from metal to oxide and fluoride are compared wi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeats of combustion and strain energies of bicyclo[n.m.O]alkanesSho-Ju Chang, Donal McNally, Shahrokh Shary-Tehrany, Sister Mary James Hickey, and Richard H. BoydCite this: J. Am. Chem. Soc. 1970, 92, 10, 3109–3118Publication Date (Print):May 1, 1970Publication History Publi…
Abstract Blends of poly(2,6‐dimethyl‐1,4‐phenylene ether) (PPO) and atactic polystyrene (PS) have been prepared by mechanically mixing powders of the two polymers and subjecting the mixtures to three different thermal treatments. Three different compositions were studied by the dynamic mechanical and DSC techniques. T…
Superconductivity persists in several, layered, transition metal dichalcogenide superconductors when the layers are spread apart to accommodate organic molecules between them. These materials are of interest not only because of their two-dimensional character but also because they may provide a means for examining hyp…
Second-order displacive transitions of a type often observed in crystals of perovskite structure are analyzed by means of a phenomenological model employing optical soft-mode and elastic-strain coordinates. Relations connecting spontaneous distortion, soft-mode vibrational frequencies, and elastic constants of a tetra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and electron paramagnetic resonance studies of metalloporphyrins and their electrochemical oxidation productsAlexander Wolberg and Joost ManassenCite this: J. Am. Chem. Soc. 1970, 92, 10, 2982–2991Publication Date (Print):May 1, 1970Publication History Publis…
Abstract The nonvolatile products in thermal‐oxidized polypropylene sheet have been quantitatively identified by infrared analysis and chemical reaction. The molecular weight changes with oxidation have been studied by gel‐permeation chromatography. It was determined that there is a functional group at each end of a c…