Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplexes of platinum(II) and palladium(II) with the 2,2'-biphenyldiyl dianion as a .sigma.-bonded chelate ligandChristine Cornioley-Deuschel and Alex Von ZelewskyCite this: Inorg. Chem. 1987, 26, 20, 3354–3358Publication Date (Print):October 1, 1987Publication History Publi…
The present review of very recent electret work starts with a history-oriented introduction which refers to important early studies of charge storage in insulators; a number of relevant surveys are listed for further information on previous electret research. This paper concentrates on work published during the last f…
Abstract Fragmentation of support/catalyst particles during propylene polymerization in the gas phase is analyzed via a mathematical model including energy and mass transfer with chemical reaction processes. The rupture phenomenon is considered specifically by the model, and evaluated as it proceeds in time, Two diffe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow polydispersity homopolymers and block copolymers by ring opening of 5,6-dicarbomethoxynorborneneJohn S. Murdzek and Richard R. SchrockCite this: Macromolecules 1987, 20, 10, 2640–2642Publication Date (Print):October 1, 1987Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical vs. redox catalysis of electrochemical reactions. Reduction of trans-1,2-dibromocyclohexane by electrogenerated aromatic anion radicals and low oxidation state metalloporphyrinsDoris Lexa, Jean Michel Saveant, Khac Binh Su, and Dan Li WangCite this: J. Am. Chem. Soc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCation-network interactions in binary alkali metal borate glasses. A far-infrared studyE. I. Kamitsos, M. A. Karakassides, and G. D. ChryssikosCite this: J. Phys. Chem. 1987, 91, 22, 5807–5813Publication Date (Print):October 1, 1987Publication History Published online1 May 2…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrbital symmetries and magnetic interaction between copper(II) ions and the o-semiquinone radical. Magnetic studies of (di-2-pyridylamine)(3,5-di-tert-butyl-o-semiquinonato)copper(II) perchlorate and bis(bis(3,5-di-tert-butyl-o-semiquinonato)copper(II))Olivier Kahn, Rob Prin…
Polyphosphazenes possess polymer backbones consisting of nitrogen and phosphorous formally separated by alternating single and double bonds. Their potential for biomedical applications stems from the fact that polymers with a wide array of properties can be synthesized using the same starting compound, poly(dichloroph…
We study, within a WKB approximation, the evolution of time-dependent deformations of the needle crystal solution of the two-dimensional symmetric model of solidification. We find that perturbations with fixed small frequencies are initially amplified as they propagate from near the tip down the dendrite but ultimatel…
MZr 4 P 6 O 24 (M=Mg, Ca, Sr, Ba), which belongs to a new, low‐thermal‐expansion family of materials known as [NZP] or [CTP], were synthesized by solid‐state reaction (oxide mixing) and sol‐gel methods, and their sinterability in two cases was investigated and compared. Thermal‐expansion measurements were made on sint…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoactivation of metal oxide surfaces: photocatalyzed oxidation of alcohols by heteropolytungstatesMarye Anne Fox, Raul Cardona, and Elizabeth GaillardCite this: J. Am. Chem. Soc. 1987, 109, 21, 6347–6354Publication Date (Print):October 1, 1987Publication History Published…
The time-dependent behavior of sidebranching deformations in the three-dimensional symmetric model of dendritic solidification is studied within a WKB approximation. Localized wave packets generated by pulses in the neighborhood of the tip are found to grow in amplitude and to spread and stretch as they move down the…
The simultaneous creep and densification of glass powder compacts was studied as a function of low applied uniaxial stress, temperature, and particle size. The creep rate can be expressed as the sum of the contribution from the applied stress that varies linearly with stress, and a contribution due to anisotropic dens…
Processing procedures and resulting mechanical properties of open-cell, low-density (relative density < 0.1) ceramic macrostructures were investigated. These macrostructures were fabricated by slurry coating reticulated polymer substrates. Cracks in the struts powder coating, which were produced during the pyrolysis o…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Abstract Hypergolic or self ignition delays of unsymmetrical dimethylhydrazine (UDMH) and several amine fuels, mixed with three fuming nitric acid oxidizers, have been determined, at room temperature, in a highly sensitive “Cup Test” apparatus. Ignition delay (ID) variations have been studied with respect to the chemi…
Results are reported of an investigation using synchrotron radiation into the effects of temperatures up to 1173 K on pressure-induced phase transitions in phosphorus. A cubic type multi-anvil press was employed and a diffraction pattern in an energy-dispersive mode was taken for a period of time, typically 200 s, wit…
Abstract Dynamic mechanical behavior and X‐ray diffraction of two series of segmented polyurethaneimides (PUI) prepared either from poly(ethylene adipate) glycol (PEA), pyromellitic dianhydride (PMDA) and 4,4′‐diphenylmethane diisocyanate (MDI), or from PEA, PMDA, and a mixture of 2,4‐ and 2,6‐tolylene diisocyanate (T…
The following side reactions occurring in the formation of polyurethanes were modeled: a reaction of excess phenyl isocyanate either with 1-butanol in 1, 4-dioxane and in bulk, or with n-butylphenyl urethane or water in dioxane catalyzed with dibutyltin dilaurate that leads to the formation of n-butyl-α, γ-diphenyl al…
The effects of low concentrations of seven different substitutional impurities on the phonon thermal conductivity of iron were determined at 300 K. Of the seven solutes, Ni caused the smallest reduction and W the greatest. The data were analyzed on the basis of Callaway’s model, and the resulting impurity scattering w…