Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility of the poly(hydroxy ether) of bisphenol A with water-soluble polyethersL. M. Robeson, W. F. Hale, and C. N. MerriamCite this: Macromolecules 1981, 14, 6, 1644–1650Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published ini…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIntramolecular vibrational energy redistributionPaul R. Stannard and William M. GelbartCite this: J. Phys. Chem. 1981, 85, 24, 3592–3599Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 November 1981https://pubs.acs.or…
J C H Spence 1981 Clarendon Press: Oxford University Press x + 370 pp price £35 The author has provided us with an excellent and readable review of the fundamental principles of high resolution electron microscopy. He has, however, managed to combine his theoretical treatment with a discussion of the pitfalls for the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge-transfer spectra of metallophthalocyanines: correlation with electrode potentialsA. B. P. Lever, S. R. Pickens, P. C. Minor, S. Licoccia, B. S. Ramaswamy, and K. MagnellCite this: J. Am. Chem. Soc. 1981, 103, 23, 6800–6806Publication Date (Print):November 1, 1981Publi…
The visible and near infrared luminescence spectra of MoCl6 3- in Cs2NaMCl6 (M=Sc, Y, In) and MoBr6 3- in Cs2NaYBr6 have been measured between 15 000 cm-1 and 3000 cm-1 at liquid helium temperatures. Comparison with new electronic absorption, infrared and Raman spectra have enabled five luminescence transitions betwee…
The effects of surface insulating coatings on magnetic properties in commercial highly grain oriented Si-Fe sheets are shown on the basis of domain observation using a high voltage SEM. The average 180° wall spacing in grain oriented Si-Fe sheets with the coatings could be expressed semiempirically as a function of ti…
Abstract By 1 H‐NMR spin‐echo spectroscopy the self‐diffusion coefficients D te of almost spherical test molecules—Sn(CH 3 ) 4 , Si(OCH 3 ) 4 , Ti(O t Bu) 4 , and SnOct 4 —in the solvents—CCl 4 , Si(OCD 3 ) 4 , and Si(O 1 Pr) 4 ‐d 28 —were studied as a function of temperature and concentration.—The excess volumes of t…
Electrical conductivity and thermoelectric power measurements on pure and Li‐substituted Co 3 O 4 were performed at 200° to 900°C. Impurity‐induced p‐type semiconduction was observed at low temperatures and intrinsic behavior at high temperatures. A hopping scheme for electron hole conduction was confirmed, and site e…
The total power loss under alternating flux at power frequencies and zero applied stress conditions is an important criterion for the manufacturer and user of soft magnetic materials. The total power loss may be divided into three major types, namely the static hysteresis loss, classical eddy current loss and excess e…
During ageing, proteinaceous media undergo various chemical and structural alterations to acquire new physico-chemical properties. The action of light, oxygen and interactions between mixed media components are discussed. The influence of some conservation treatments is considered.
The centers [AlO 4 /M + ] + , formed in α-quartz by X-irradiation at 77 K, contain an aluminum ion substituted for a silicon ion, with an electron removed from a neighboring oxygen by the ionizing radiation. In addition, there is an interstitial ion M + which acted as a charge compensator before the irradiation. Cente…
Abstract The reducibility of La1-xSrxCoO3 (a perovskite-type mixed oxide) remarkably increased with the Sr2+ content, x, but the rate of re-oxidation of the reduced catalysts decreased with x. These trends well explain the catalytic activity for oxidation on the basis of redox mechanism.
Abstract Recent opinions on the effect of nonmetallic inclusions, especially sulfides, on the nucleation of pits, stress corrosion cracks, and hydrogen‐induced cracks are reviewed. The nonmetallic inclusions present in steels as impurities adversely affect the corrosion resistance of steels. This is true for both the…
The EPR spectra of the title compound revealed an unusual linewidth anisotropy. The anisotropy showed behavior characteristic of relaxation effects due both to exchange anisotropy and to spin diffusion. This is the first ferromagnetic layer salt of the ${(R\mathrm{N}{\mathrm{H}}_{3})}_{2}(\mathrm{Cu}{\mathrm{Cl}}_{4})…
Amorphous silicon has been electrodeposited from nonaqueous baths using SiHCl 3 as the silicon source. A typical bath composition was 1.0 M SiHCl 3 in propylene carbonate containing 0.1M tetrabutyl ammonium chloride as the supporting electrolyte. Deposits were made potentiostatically at around −2.5V vs. Pt reference a…
Abstract This perspective embraced many factors that are important in understanding silicone elastomer technology and the reasons for the unique properties that they exhibit. The fact that they possess the lowest transition temperatures for any known polymer qualify them as a viscoelastic polymer that can be converted…
Mechanisms of corrosion at the areas of contact between screw heads and plate holes were investigated using electrochemical potential recording techniques. Static crevice corrosion was studied with plates and screws in isotonic and hypertonic saline solutions (0.9 to 7.2% NaCl). Fretting corrosion was studied in vitro…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInclusion of hydrodynamic interaction in polymer dynamical simulationsMarshall FixmanCite this: Macromolecules 1981, 14, 6, 1710–1717Publication Date (Print):November 1, 1981Publication History Published online1 May 2002Published inissue 1 November 1981https://pubs.acs.org/d…
The properties of streamer or electron avalanche pulses have been investigated for point-plane, and positive and negative dc corona discharges in gaseous SF6 over the pressure range of 50–500 kPa. Measurements were made of the voltage and pressure dependence of electrically detected corona pulse-height distributions,…
Recent studies suggest that formation of siderite is critical for the formation of highly protective, corrosion‐resistant scales in water distribution pipes. Conditions that tend to hinder siderite formation lead to higher corrosion rates and nonuniform, thick scales.