Materials Literature
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The significance of the finishing process for the preparation of flock fibres is discussed. The performance of nylon 6.6 flock fibres at different stages in the manufacture of flocked fabrics has been examined in the laboratory after the application of various finishing treatments to the fibres. The results demonstrat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and dynamics of starch crosslinked with urea-formaldehyde polymers by carbon-13 CP/MAS NMR spectroscopyParshuram G. Shukla, Swaminathan Sivaram, and Baijayantimala MohantyCite this: Macromolecules 1992, 25, 10, 2746–2751Publication Date (Print):May 1, 1992Publicati…
NutraSweet sludge, a by‐product from the manufacture of the artificial sweetner aspartame, is often applied to land as fertilizer. In many cases, the sludge is surface‐applied, which could result in gaseous losses of nitrogen. In order to determine the relative importance of nitrogen losses through ammonia volatilizat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical vapor deposition precursor chemistry. 3. Formation and characterization of crystalline nickel boride thin films from the cluster-assisted deposition of polyhedral borane compoundsShreyas S. Kher and James T. SpencerCite this: Chem. Mater. 1992, 4, 3, 538–544Publicat…
We have used photothermal-beam-deflection spectroscopy to measure the change in the index of refraction of ${\mathrm{Ti}}^{3+}$-doped sapphire after pulsed excitation at 532 nm with a neodymium-doped yttrium aluminum garnet laser. The beam-deflection signal arises from both thermal and nonthermal sources. The nontherm…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly[bis(phosphazo)phosphazenes] bearing aryloxy and alkoxy side groupsHarry R. Allcock and Dennis C. NgoCite this: Macromolecules 1992, 25, 11, 2802–2810Publication Date (Print):May 1, 1992Publication History Published online1 May 2002Published inissue 1 May 19…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConversion of chlorofluorocarbons into chlorofluorohydrocarbons using the Atherton-Todd reaction with dimethyl phosphonateEmil Georgiev, D. Max Roundhill, and Koljo TroevCite this: Inorg. Chem. 1992, 31, 10, 1965–1968Publication Date (Print):May 1, 1992Publication History Pu…
High-pressure resistivity measurements have been performed on Ge7·5AsxTe92·5-x. (x = 20, 40, 45, 50 and 55) and Ge10AsxTe90-x(x= 15, 20, 35, 40, 45 and 50) glasses. The glasses show reversible metallization behaviour under pressure. The pressure derivative of the logarithm of the resistivity of the glasses is a minimu…
We study the equilibrium positions of a long prismatic particle of convex cross-section at a liquid/liquid interface in the gravity-free situation. We show in particular that : i) in a stable equilibrium position the contact angles at both three-phase lines obey the Young equation, ii) for any convex cross-section the…
We have designed a vacuum disengager system to remove tritium from the Flibe (Li2BeF4) molten salt coolant of the HYLIFE-II fusion reactor. There is a two-stage vacuum disengager in each of three intermediate heat exchanger (IHX) loops. Each stage consists of a vacuum chamber 4 m in diameter and 7 m tall. As 0.2 mm di…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of .pi.-.pi. interactions on molecular structure and resonance Raman spectra of crystalline copper(II) octaethylporphyrinL. D. Sparks, W. Robert Scheidt, and J. A. ShelnuttCite this: Inorg. Chem. 1992, 31, 11, 2191–2196Publication Date (Print):May 1, 1992Publication…
The Sternglass theory [Sternglass, Phys. Rev. 108, 1 (1957)] for fast-ion-induced secondary-electron emission from metals has been modified to predict the secondary-electron yield from metals impacted by energetic (several keV to about 200 keV) electrons. The primary modification of the theory accounts for the contrib…
The authors investigated the corrosion behavior of the C71640 copper-nickel alloy in seawater by x-ray photoelectron spectroscopy. Results from different initial and service conditions are presented and discussed in terms of the chemical and quantitative composition of the samples on the basis of x-ray photoelectron s…
In this paper, we describe the method used to evaluate the theory of the compressional energy of the random fiber assembly, which was developed mathematically in Part I. We also introduce a mathematical derivation of the method for updating the orientation density function of fibers in a general fiber assembly. In ord…
Scattering loss characteristics of Ge-Se binary chalcogenide glass optical fibers are investigated. It is found that there is a strong correlation between the wavelength-independent scattering loss and the absorption caused by H2O impurities. Therefore, the amount of H2O impurity mainly determines the wavelength-indep…
Abstract A series of liquid‐crystalline copolymers 1 with a chiral azobenzene moiety as photoreactive mesogenic unit was prepared. The polymers were fractionated and the mesophase behaviour of the high‐ and low‐molecular weight fractions was examined. The copolymers display smectic A and cholesteric phases. For the ch…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge-transfer emission in meso-linked zinc porphyrin-anthraquinone moleculesKeiko Kamioka, Russell A. Cormier, Thomas W. Lutton, and John S. ConnollyCite this: J. Am. Chem. Soc. 1992, 114, 11, 4414–4415Publication Date (Print):May 1, 1992Publication History Published onlin…
Abstract Surface‐enhanced Raman scattering (SERS) spectra of Thiram (C 6 H 12 N 2 S 4 ) and Ferbam (C 9 H 18 N 3 S 6 Fe); and normal Raman scattering (NRS) spectra of Thiram and Metam‐Sodium (C 2 H 4 NNaS 2 ) were investigated. The SERS spectra of the two compounds and NRS spectrum of Metam‐Sodium were recorded for th…
Using the direct measurement of the photosensitized luminescence of singlet molecular oxygen (1O2) the rate constants (kq) have been determined for 1O2 quenching by the monomeric molecules of the following phthalocyanines and naphthalocyanines in chloroform: tetra-(4-tert-butyl) phthalocyanine (I); octa-(3,6-butoxy) p…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDe-SOx catalyst: the role of iron in iron mixed solid solution spinels, MgO.cntdot.MgAl2-xFexO4Jin S. Yoo, Alak A. Bhattacharyya, Cecelia A. Radlowski, and John A. KarchCite this: Ind. Eng. Chem. Res. 1992, 31, 5, 1252–1258Publication Date (Print):May 1, 1992Publication Hist…