Materials Literature
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An exact formulation is given for the inhomogeneous swelling of an elastomeric matrix containing a spherical inclusion, and is presented in a form amenable to solution for arbitrary free energy of mixing and network strain energy functions, rigid or soft inclusions, and finite or infinite matrix size. Specific example…
Abstract Domain structures of solvent‐cast films of A–B–A block copolymers of styrene‐isoprene‐styrene were studied by electron microscopy by use of the OsO 4 fixation technique. The effects of varying proportions of the two components and the casting solvent upon the domain structures were examined. It is concluded t…
A new series of gold cluster compounds has been identified. These are tri-univalent electrolytes, with the general formula (Au9L8)X3[L = PPh3 or P(C6H4Me-p)3, and X = NO3, PF6, pictate, or BF4, or ClO4].
Abstract Es wurde die Temperaturabhängigkeit der magnetischen Suszeptibilität und die paramagnetische Elektronenresonanz von 12 Elementdipyridylen untersucht. Bei den Hauptgruppenverbindungen und ScDipy 3 ist der Magnetismus infolge Spinwechselwirkung von Radikalanionen stark temperaturabhängig. In den übrigen Übergan…
The cl)'stallogral)hy oj I)eorlite has been investigated lIlaini;' by means oj transmission electron microscolY. The I)earlite was obloined by the isothermal decomposition oj 0 high pu rity elliectoid iron-carbon allstenite .
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Procedure for Eliminating and Evaluating Solvent Effects on Thermodynamic Data for Donor-Acceptor InteractionsRussell Drago, M Nozari, and Glenn VogelCite this: J. Am. Chem. Soc. 1972, 94, 1, 90–94Publication Date (Print):January 1, 1972Publication History Published online…
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Abstract Data on tensile strength and elongation at break for a series of Viton A‐HV vulcanizates are discussed. The data were obtained at various extension rates at temperatures from −5 to 230°C (25 ≲ T — T g ≲ 260°C) on seven vulcanizates having crosslink densities v e (estimated from C 1 in the Mooney‐Rivlin equati…
With a double-axis spectrometer the neutron-scattering cross section dσ/dΩ of polycrystalline graphite has been measured as a function of temperature. The elastic coherent scattering yielded the variations of the lattice constants for the directions parallel and perpendicular to the c axis of the hexagonal graphite la…
(1972). Dislocation–Substructure–Strengthening and Mechanical–Thermal Treatment of Metals. International Metallurgical Reviews: Vol. 17, No. 1, pp. 175-202.
The model developed by Flory and Vrij 8 to account for the dependence of melting point on chain ength of linear chain homologues has been extended and applied to polyethylene oxide polymers with molecular weights in the range 200–4000. Enthalpy and entropy of fusion are described in terms of the number of monomer repe…
Abstract The thermal degradation of methyl α‐ D ‐glucopyranoside, a cellulose model of intermediate complexity, was investigated in an attempt to gain insight into the pyrolytic reactions of analogous cellulose systems. The pure glucoside pyrolysis proceeds through formation of an intermediate of higher thermal stabil…
Abstract The connection between the growth rate and morphology of supermolecular structures was investigated for polyoxymethylene which was isothermally crystallized from the melt at various temperatures. Optical and electron microscopy showed that below 158°C the crystallization occurred in the spherulite form, while…
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Abstract This preliminary study has related the nature of rupture in starch grains, induced by ultrasound, to the ambient atmosphere, the concentration of the suspension, the frequency and the time of irradiation. It has been tentatively concluded that principally mechanical effects have been induced under conditions…
Pentacene and hexacene both react with sulphur to form stable hexasulphides for which double fused thiathiophthen structures (6) and (8) or (9) are proposed. The electrical conductivity of hexacene hexasulphide is similar to that of the well-known naphthacene tetrasulphide (1) and 109 times greater than that of pentac…
A synergistic effect is apparent when catalysts are used in hydrogen electrodes. The exact mechanism of this effect depends on the composition and mode of formation of a reduced intermediate tungsten oxide. Chemical analysis and x‐ray studies confirmed that this intermediate oxide consists of blue tungsten bronzes. Th…
Native, acid-soluble and acid-insoluble collagen from the tail tendons of rats and calves have been reduced by 3H-sodium borohydride. The reduced cross-link derivatives were separated by ion exchange chromatography. The destruction of the cross-links under the conditions of hydrolysis was measured. By applying the app…
Quantum chemistry is now some 40 years old, but the problem of calculating the rates of complex reactions, in a useful approximation, from the fundamental atomic constants, remains intractable.
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