Materials Literature
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Abstract A series of polyurethane block polymers based on hydroxybutyl‐terminated polydimethyl‐siloxane soft segments of molecular weight 2000 were synthesized. The hard segments consisted of 4,4′‐methylenediphenylene diisocyanate (MDI) which was chain extended with either 1,4‐butanediol (BD) or N ‐methyldiethanolamin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSteric effects and the behavior of Cu(NN)(PPh3)2+ systems in fluid solution. Crystal and molecular structures of [Cu(dmp)(PPh3)2]NO3 and [Cu(phen)(PPh3)2]NO3.1.5EtOHJon R. Kirchhoff, David R. McMillin, William R. Robinson, Douglas R. Powell, Ann T. McKenzie, and Sam ChenCite…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal-spine conductivity in a partially oxidized metallomacrocycle: (phthalocyaninato)cobalt iodideJens Martinsen, Judith L. Stanton, Richard L. Greene, Jiro Tanaka, Brian M. Hoffman, and James A. IbersCite this: J. Am. Chem. Soc. 1985, 107, 24, 6915–6920Publication Date (Pr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatecholate coordination to copper: structural characterization of a tetrachloro-o-catecholate-bridged dicopper(II) complex as a model for intermediates in copper-catalyzed oxidation of catecholsKenneth D. Karlin, Yilma Gultneh, Terrence Nicholson, and Jon ZubietaCite this:…
Abstract Boron adsorption behavior was investigated on various crystalline and x‐ray amorphous Al and Fe oxide minerals. Adsorption increased at low pH, exhibited a peak in the pH range 7 to 8, and decreased at high pH. The magnitude of B adsorption was much greater for the x‐ray amorphous materials. Since B adsorbs s…
The effect of argon ion bombardment, during deposition on the microstructure of several tens of nanometers thick Ag films, has been studied. The structure of the Ag films was analyzed by x-ray powder diffraction method. Results show that Ar ion bombardment not only influenced the film growth process but had a signific…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTunable interaction in (.mu.-oxamido)copper(II) binuclear complexesYves Journaux, Jorunn Sletten, and Olivier KahnCite this: Inorg. Chem. 1985, 24, 24, 4063–4069Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissue 1 Novembe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTheoretical study of the influence of the molecular weight on the maximum tensile strength of polymer fibersYves Termonia, Paul Meakin, and Paul SmithCite this: Macromolecules 1985, 18, 11, 2246–2252Publication Date (Print):November 1, 1985Publication History Published onlin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of carbon monoxide, carbon dioxide, hydrogen, and water on titania surfaces with different oxidation statesG. B. Raupp and J. A. DumesicCite this: J. Phys. Chem. 1985, 89, 24, 5240–5246Publication Date (Print):November 1, 1985Publication History Published online1…
The preparation of Ru and RuO 2 thin films by organometallic chemical vapor deposition and an investigation of the films' properties are reported. Ru is of interest for metallization in integrated circuit fabrication because its thermodynamically stable oxide, RuO 2 , also exhibits metallic conductivity. As a result,…
A systematic study of the inert‐strength characteristics of ceramics as a function of crack size relative to grain size has been made using controlled indentation flaws. The focus of the test program is on aluminas, with barium titanates and glass‐ceramics providing support data in confirmation of general trends. On p…
During reorganization of collagen gels by human skin fibroblasts the total protein content of the gels remained approximately constant. Only 5% of the collagen was degraded, although the volume of the gels decreased by 85% or more. It could be concluded, therefore, that gel reorganization required physical rearrangeme…
Oxidation of polyethylene with chromic acid/sulfuric acid generates a material (PE-CO2H) having a high density of carboxylic acid and ketone functionalities in a thin surface layer on the polymer. This paper determines the extent of ionization of the surface and near-surface carboxylic acid groups of these materials i…
A structural model of ZnO in the cumulant-expansion formalism has been studied with X-ray intensities measured on a spherical crystalat293 and,473 K. In the least-squares refinements, the thermal vibrations appear isotropic for both atomic species at the two temperatures investigated. The equivalent isotropic temperat…
The interaction of various alkenes with gold electrodes has been studied using surface-enhanced Raman spectroscopy (SERS). Large decreases, from 70 to 140/cm, were observed in the C-C double bond and C triple bond C stretching frequencies upon adsorption which are attributed to adsorbate-surface bonding involving thes…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDimagnesium cobalt(I) pentahydride, Mg2CoH5, containing square-pyramidal pentahydrocobaltate(4-) (CoH54-) anionsP. Zolliker, K. Yvon, P. Fischer, and J. ScheferCite this: Inorg. Chem. 1985, 24, 24, 4177–4180Publication Date (Print):November 1, 1985Publication History Publish…
A critical analysis is given of the EPR spectrum exhibited by the rare-earth S-state ions, Gd3+ and Eu2+, in glassy and disordered polycrystalline materials. The analysis of this spectrum and of its previous interpretations is based on (a) a set of criteria derived from a wide range of experimental EPR and optical dat…
The thermal response of a polymer composite material undergoing decomposition has been modeled. A one-dimensional transient thermal model with an n th order ap proximation for the rate of decomposition was applied. The model was tested by ex perimentally measuring the temperature profiles during decomposition for a gl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInterlayer chemistry between thick transition-metal oxide layers: synthesis and intercalation reactions of K[Ca2Nan-3NbnO3n+1] (3 .ltoreq. n .ltoreq. 7)A. J. Jacobson, Jack W. Johnson, and J. T. LewandowskiCite this: Inorg. Chem. 1985, 24, 23, 3727–3729Publication Date (Prin…
The symmetry and stability of icosahedral incommensurate structures and generalized two-dimensional Penrose pentagonal structures are studied. The crystallographic properties of Penrose lattices are described by five-dimensional (5D) super space groups, and the icosahedral structures are described by 6D space groups,…