Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of crosslinks on the phase separation behavior of a miscible polymer blendRobert M. Briber and Barry J. BauerCite this: Macromolecules 1988, 21, 11, 3296–3303Publication Date (Print):November 1, 1988Publication History Published online1 May 2002Published inissue 1 Nov…
Abstract Acrylonitrile‐butadiene rubber having carboxylic acid groups (XNBR) and polystyrene having oxazoline groups, were melt blended in a Rheomix mixer under optimized conditions, The ratio of rubber to polystyrene phase was kept constant at 1:4 by weight. The concentration of the reactive oxazoline groups in the p…
Iron(II) and nickel(II) [MN6]X2 type complexes have been prepared from 2-(pyrazol-1-yl]pyridine (1pp), 2-(pyrazol-1-yl) imidazoline (pi), 2- (pyrazol-3-yl)pyridine (3pp) and 2,6-bis(pyrazol-3-yl)pyridine ( bpp ). Variable-temperature magnetic and Mossbauer spectral studies establish that [Fe(1pp)3]X2 is low spin and […
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing currents in wholly inorganic heteropoly blue complexes. Evaluation by a modification of Evans' susceptibility methodMariusz. Kozik, Nieves. Casan-Pastor, Charles F. Hammer, and Louis C. W. BakerCite this: J. Am. Chem. Soc. 1988, 110, 23, 7697–7701Publication Date (Print…
Microdeformation characteristics in alloy 600 tubing have been examined after various tensile deformations. Microstructure developed during processing was found to control subsequent microdeformation behavior. Grain boundary carbides were the most effective source of dislocations, activating at lower macrostrains and…
Abstract Inhibition of the corrosion of iron in hydrochloric acid solutions by amino acids was studied. Twenty‐two different common amino acids and four related compounds were used. Potentiodynamic polarization curves were obtained for iron wire in deaerated 1 M hydrochloric acid solution. Intersection of the linear T…
A comprehensive theory has been developed to describe all manifestations of Coulomb interactions between charged particles in low- and medium-density nonrelativistic beams, e.g., as found in electron beam pattern generators and scanning electron microscopes. A survey is given of the analytical prescriptions for the ca…
Abstract A series of experiments have been run to determine which mechanisms dominate carbon black reinforcement of rubber. A broad range of compounds using oil-extended and non-oil-extended rubbers and carbon blacks covering the spectrum of tread blacks have been tested. The results for measurements made in an all-SB…
Abstract The adsorbate formed during ethanol oxidation in acidic solutions is studied by Fourier transform infrared reflection‐absorption spectroscopy (FTIR) at constant potential, on‐line (DEMS) and thermal desorption mass spectroscopy (ECTDMS). – As in the case of methanol adsorbate CO ad was identified by FTIR and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-state carbon-13 NMR characterization of polyanilinesS. Kaplan, E. M. Conwell, A. F. Richter, and A. G. MacDiarmidCite this: J. Am. Chem. Soc. 1988, 110, 23, 7647–7651Publication Date (Print):November 1, 1988Publication History Published online1 May 2002Published inissu…
Exopolymers which anchor sessile bacteria to metallic surfaces exhibit the capacity to bind copper ions with high affinity. Ionized carboxyl groups on the polymers appear to participate in cupric ion binding. Formation of complexes between the polymers and cupric ions results in the release of protons from the polymer…
Abstract The effect of variation of structural factors on the spin-exchange interaction between copper(II) centers in dialkoxo-bridged dinuclear copper complexes were studied by the ab initio MO method with UHF formalism. The calculations were performed on di-μ-methoxotetraamminedicopper(II). The J-values were obtaine…
NiO films have been grown on high‐purity Ni and Ni 0.1 weight percent (w/o) Cr alloy, at 700°C and 0.21 bar, by sequential oxidation in 16 O 2 and 18 O 2 . The distributions of oxygen, Ni, and Cr isotopes in the films were analyzed using SIMS. For both materials, the rate controlling transport process was found to be…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelation between geometry and charge transfer in low-dimensional organic saltsTimothy C. Umland, Sharon Allie, Tom Kuhlmann, and Philip CoppensCite this: J. Phys. Chem. 1988, 92, 22, 6456–6460Publication Date (Print):November 1, 1988Publication History Published online1 May…
In this paper, we derive a general expression for the excitation probability corresponding to the collection of inelastically scattered electrons in a scanning transmission electronic microscopy configuration. We prove that, if all inelastically scattered electrons are collected, then the fraction of electrons that wi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRing-opening polymerization of 3(S)-[(benzyloxycarbonyl)methyl]-1,4-dioxane-2,5-dione: a new route to a poly(.alpha.-hydroxy acid) with pendant carboxyl groupsYohiharu Kimura, Kenji Shirotani, Hideki Yamane, and Toshio KitaoCite this: Macromolecules 1988, 21, 11, 3338–3340Pu…
This paper is a review of dielectric aging and a discussion of the possible mechanisms that may be responsible for the time dependent decrease in complex dielectric constant. The discussion is divided into three material systems: barium titanate, PZT and relaxors. Aging is considered as it affects the real portion of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAustraline, a Novel Pyrrolizidine Alkaloid Glucosidase Inhibitor from Castanospermum australeRussell J. Molyneux, Mabry Benson, Rosalind Y. Wong, Joseph E. Tropea, and Alan D. ElbeinCite this: J. Nat. Prod. 1988, 51, 6, 1198–1206Publication Date (Print):November 1, 1988Publi…
The multislice method, pioneered by Cowley and Moodie, has recently been adapted to simulate annular dark-field scanning transmission electron-microscope (ADF STEM) images. This paper presents a series of calculations using this new approach with experimental parameters appropriate for a VG-HB501 STEM to investigate t…
A rapid analytical technique has been developed for obtaining the reduced density function, G(r), from polycrystalline and amorphous thin films, using post-specimen scanning and an energy loss spectrometer on a transmission electron microscope. The technique gives on-line analysis of nearest-neighbour distances to an…