Materials Literature
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Abstract Self‐trapped hole (STH) and self‐trapped exciton (STE) states which are formed in Y 3 Al 5 O 12 , Y 2 SiO 5 , and TR 2 Si 2 O 7 crystals under γ‐irradiation in the temperature interval of 77 to 200 K are investigated. The STH is shown to be molecular O , absorbing at 1.6 eV (for Y 3 Al 5 O 12 ) and at 1.65 eV…
Stress corrosion cracking investigations on U-bend samples of sensitized 304 austenitic stainless steel have been conducted in sulfurous acid solutions in the concentration range, 0.40 to 10% at ambient temperatures. Samples were found to fracture in solutions of more than 3% sulfurous acid. Chemical analysis of solut…
Abstract In the course of our investigations of the ternary system Rb-Au-Sn we obtained the new compound Rb 4 Au 7 Sn 2 . Its crystal structure has been determined by single crystal X-ray diffraction data. It crystallizes in the hexagonal (rhombohedral) space group R3̄m with unit-cell parameters a = 680.1(3) pm and c…
Abstract To elucidate the compatibility of polymer and plasticizer components of binders a study of polymer–plasticizer interactions by differential scanning calorimetry (DSC) and swelling tests was conducted. The glass transition temperatures ( T g 's) of mixtures of polymers and plasticizers, both cured and uncured,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBinuclear dicyclopentadienyltitanium(III) complexes: magnetic-exchange interactions propagated by the methylene groups of cyclic aliphatic dicarboxylic acid dianionsLinda Stecher Kramer, Arrietta W. Clauss, Lynn C. Francesconi, David R. Corbin, David N. Hendrickson, and Gale…
A quasisteady-gas-phase and thermally-thin-substrate model is used to analyze the transient behavior of catalytic monolith combustors in fuel-lean operation. The combustor response delay is due to the substrate thermal inertia. Fast response is found to be favored by thin substrate, short catalytic bed length, high co…
Abstract Four commercially established ferritic‐austenitic stainless steel grades have been investigated with respect to σ‐phase embrittlement by exposure in the temperature interval 700–900 °C. The results illustrate the fact that this type of steels is rather susceptible to such an embrittlement, and this has to be…
Polydichlorophosphazene (NPC12)X is unique as a synthetic precursor for poly(organo)phosphazenes [1–6] and presents special problems in polymerization studies because of branching, crosslinking, and cyclization reactions and in characterization due to the polymer's hydrolytic instability. This paper reviews the litera…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTN-Methylprotoporphyrin IX. Identification by NMR of the nitrogen alkylated in each of the four isomersKent L. Kunze and Paul R. Ortiz de MontellanoCite this: J. Am. Chem. Soc. 1981, 103, 14, 4225–4230Publication Date (Print):July 1, 1981Publication History Published online1…
Abstract This review will be restricted to the applications of liquid polybutadienes (BR) which, as prepared, are devoid of functional groups other than the unsaturation left after polymerization. These products should not be confused with the so called telechelic BRs in which terminal functional groups are deliberate…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlanar, pleated, and saddle-shaped structures of the phthalocyanine dianion in two novel multidentate oxygen-donor complexes of dipotassium phthalocyanineR. F. Ziolo, W. H. H. Guenther, and J. M. TroupCite this: J. Am. Chem. Soc. 1981, 103, 15, 4629–4630Publication Date (Pri…
For the transport calculation of gamma rays including bremsstrahlung, an improvement is made in the PALLAS-PL, SP discrete ordinates direct-integration code to enable evaluation of bremsstrahlung. The electrons resulting from Compton scattering, pair production, and the photoelectric effect are individually evaluated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRaman spectroscopic study of the high-pressure phase of polyethyleneStephanie L. WunderCite this: Macromolecules 1981, 14, 4, 1024–1030Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published inissue 1 July 1981https://pubs.acs.org/doi/10.…
The solubilities of gypsum (CaSO 4 ·2H 2 O) and halite (NaCl) in aqueous solutions with ionic strengths between 3 and 13 were studied under ambient conditions. Mixtures of Mediterranean seawater and Dead Sea brines, evaporated to various degrees, served as experimental solutions. The practical solubility constant of g…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGallium-71 NMR studies of anionic gallium halide species in nonaqueous solutionBruce R. McGarvey, Michael J. Taylor, and Dennis G. TuckCite this: Inorg. Chem. 1981, 20, 7, 2010–2013Publication Date (Print):July 1, 1981Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and molecular stereochemistry of fluoro(meso-tetraphenylporphinato)iron(III)Kazunori Anzai, Keiichiro Hatano, Young Ja Lee, and W. Robert ScheidtCite this: Inorg. Chem. 1981, 20, 7, 2337–2339Publication Date (Print):July 1, 1981Publication History Published onlin…
The model of photoelectrochemical corrosion‐stabilization of semiconductors has been extended. Detailed expressions for rate constants are given including capture cross sections and energy levels for hole capture. It is concluded from analysis of experimental data that the first hole in the rate‐limiting step is captu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of tetraphenylporphyrin molecules containing heteroatoms other than nitrogen. 6. Electrochemical studiesAbraham Ulman, Joost Manassen, Felix Frolow, and Dov RabinovichCite this: Inorg. Chem. 1981, 20, 7, 1987–1990Publication Date (Print):July 1, 1981…
We have characterized the spectra, acidity constants and decay kinetics of the triplet and semireduced radical species of Safranin-O. Between pH 3.0 and pH 10.6 there are three triplet species denoted (3)DH2(+2), (3)DH(+) and (3)D, the pK(sub a)s being 7.5 and 9.2. All three triplet species exhibit first order decay,…
This paper presents an analysis of a copper torsion test specimen exhibiting a thermal softening instability at a high strain rate. A consititutive relationship derived from test data includes strain hardening, strain rate effects, and thermal softening. This relationship is used to numerically simulate the thermal so…