Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the reaction between polyester acid and carbodiimide in dry polyester diols and in a polyester polyurethaneDaniel W. Brown, Robert E. Lowry, and Leslie E. SmithCite this: Macromolecules 1981, 14, 3, 659–663Publication Date (Print):May 1, 1981Publication History P…
The periodic stripe domains of magnetic material whose easy axis is perpendicular to the film thickness may have boundary layer behavior not only in the wall but also near the film surfaces. This behavior is especially pronounced when the material characteristic length is much less than the film thickness. By means of…
In many applications, it is necessary to have permanent magnets whose characteristics vary little around a temperature Tr. We have developed a calculation to describe the thermal variation of the magnetization of the rare earth (RE) in such magnets including the effects of crystalline field. The exchange field of coba…
Formulas associated with simple beam or plate theories are used extensively in structural design, to determine You's modulus, and to determine fracture strength of brittle nonmetallic materials. The question may arise as to whether the proper ratio of beam‐width‐to‐beam‐depth is such that the bent structural element c…
Abstract Results of 13 years of field research throughout Montana have demonstrated a relatively high rate of crop yield response to K fertilization when included in an N‐P‐K fertilizer program. Correlations between crop response to fertilizer K and ammonium acetate‐extractable K have been too low for this method to b…
Abstract When linoleic acid or its esters were heated in the presence of valine a number of interaction products were formed. The major product was 2‐pentylpyridine which is thought to be produced by the reaction of 2,4‐decadienal with ammonia. Also formed were two secondary amides, isobutyloctanamide and isobutyllino…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface analysis of Raney nickel alloysJoseph C. Klein and David M. HerculesCite this: Anal. Chem. 1981, 53, 6, 754–758Publication Date (Print):May 1, 1981Publication History Published online1 May 2002Published inissue 1 May 1981https://pubs.acs.org/doi/10.1021/ac00229a003ht…
Experimental The magnesium hydroxide sulfate hydrate MgSO4.~Mg(OH)2.~H20 crystallizes in the tetragonal space group I4~/amd with cell dimensions al a 2 -- 5.242 (1), c -- 12.995 (3) A, Z -- 4. The structure was solved by Patterson methods and refined to R = 0.041 using 160 single-crystal X-ray diffraction intensities…
Quenching data are presented for reflooding by cold water of zircaloy and stainless steel clad rod bundles. In particular a filling material (Al2O3) with thermophysical properties similar to UO2 is used. The rods which are 1.1 mm in outside diameter and are 1.2 m high are arranged in a square lattice and are inductive…
Dislocation cathodoluminescence exhibiting certain peculiarities in anisotropy of polarization localized in sheets parallel to octahedral planes in a mosaic, semiconducting natural diamond is interpreted as a macroscopic manifestation of microscopic interactions between glide dislocations on these octahedral slip plan…
In earlier work, a prediction method of the immiscibility boundary of a ternary silicate glass system was developed involving two known binary immiscibility boundaries and a measured immiscibility temperature of one ternary glass composition. In the present work, the method is extended to the case where one of the two…
Abstract End-linking mixtures of very short and relatively long polydimethylsiloxane chains with a multi-functional alkoxy silane yields model elastomeric networks having a bimodal chain length distributions, and earlier studies have shown that this compositional heterogeneity increases the ultimate properties of the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect probing of the surface properties of alkali-treated aluminas by infrared and x-ray photoelectron spectroscopyP. O. Scokart, A. Amin, C. Defosse, and P. G. RouxhetCite this: J. Phys. Chem. 1981, 85, 10, 1406–1412Publication Date (Print):May 1, 1981Publication History P…
Abstract On the basis of the valence band structure regularities, obtained from combined X‐ray spectral and X‐ray photoelectron studies of electron energy spectra, a model is suggested for the interaction between valence electrons of s, p‐elements and d‐electrons of IIIA, IIB, IB, and transition metals under the forma…
Under certain conditions the anions from 2,5-dihydrothiophen 1-oxide and 2,5-dihydrothiophen 1,l-dioxide undergo ring-opening reactions and the resulting buta-1,3-dienylsulfenate and buta-1,3- dienylsulfinate ions respectively may be alkylated. The anion from 2,5-dihydrothiophen also rearranges to the buta-1,3-dienylt…
The kinetics of iron corrosion in deoxygenated 0.5M H2SO4 containing either unsubstituted benzotriazole or its 5-substituted derivatives, BTA-CH3 (TTA), BTA-NH2, BTA-NO2, BTA-Cl, and BTA-COOH have been investigated. At 0.1 mM and 2 hours immersion of iron, a simple adsorption mode of the inhibitors is indicated during…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCarbon-13 nuclear magnetic resonance chemical shifts and the microstructures of the fluoropolymers poly(vinylidene fluoride), poly(fluoromethylene), poly(vinyl fluoride), and poly(trifluoroethylene)A. E. Tonelli, F. C. Schilling, and R. E. CaisCite this: Macromolecules 1981,…
Transparent and colorless glass rods have been obtained from the BaF 2 -CaF 2 -YF 3 -AlF 3 system, which consists of 15 to 27 mol% BaF 2 , 13 to 25 mol% CaF 2 , 6 to 28 mol% YF 3 and 37 to 50 mol% AlF 3 . Certain physical properties for the rods have been measured. Glass transition temperature, crystallization tempera…
ADVERTISEMENT RETURN TO ISSUEArticleNEXTStudies on man-made photoreaction centers and electron relay systems. 1. Enhancement of charge separation by the aid of aligned viologen units in combination with ruthenium complexesTaku Matsuo, Tetsuo Sakamoto, Keisuke Takuma, Katsuhiko Sakura, and Tatsuya OhsakoCite this: J. P…
Scanning electron microscopy (BSE mode) and selected-area channelling patterns have been used to determine the orientation, size, growth rate, and. nucleation sites of secondary grains in primary recrystallized Fe-3.35Si alloy sheet. Most secondary grains nucleate in a critical depth range of 10–80 μm below the sheet…