Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly[(acyloxy)aloxane] with carboxyl ligand and its utilization for the processing of alumina fiberYoshiharu Kimura, Shozo Sugaya, Toshiaki Ichimura, and Isoji TaniguchiCite this: Macromolecules 1987, 20, 10, 2329–2334Publication Date (Print):October 1, 1987Publ…
This review critically compiles all surface structures derived from low-energy electron diffraction (LEED) crystallography reported in the referred literature prior to January 1986. Over 250 investigations have been analyzed covering all types of surfaces including clean and adsorbate-covered metal, semiconductor and…
Abstract Using fluorescence spectroscopy and gel content measurement, the photolysis of simple polyurethanes based on methylene 4,4′‐diphenyldiisocyanate (MDI) is shown to depend on both the flexibility and crystallinity of the polymer. Polyurethane films based on MDI and 1,12‐dodecanediol (MDI‐12) can be either annea…
A study of the ground-state and thermodynamic properties of the Ising spin system was carried out including an external magnetic field where two exchange energies are arranged according to a Fibonacci sequence. For this model, the decimation renormalization transformation can be performed exactly as shown recently by…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVibrational spectroscopic study on the solid-state phase transition of poly(oxymethylene) single crystals from the orthorhombic to the trigonal phaseMasamichi Kobayashi, Hirofumi Morishita, Masaki Shimomura, and Masatoshi IguchiCite this: Macromolecules 1987, 20, 10, 2453–24…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA rotary kiln process for making calcium carbideJacob J. Mu and Robert A. HardCite this: Ind. Eng. Chem. Res. 1987, 26, 10, 2063–2069Publication Date (Print):October 1, 1987Publication History Published online1 May 2002Published inissue 1 October 1987https://pubs.acs.org/doi…
We report on the results of ellipsometric measurements of refractive indices and their dispersion over the wavelength range 500 nm-1100 nm on a single-crystal thin film of 2-methyl-4-nitroaniline (MNA). The refractive indices show large anisotropy attributable to the orientation of the molecular dipole moment.
The reaction $^{32}$S${+\mathrm{}}^{182}$W has been studied at beam energies of 166, 177, 222, and 260 MeV with the goal of accounting for the distribution of the total reaction cross section among the main reaction channels. Cross sections as well as mass and energy distributions were measured over the entire angular…
The shrinkage behavior of isolated pores during the liquidphase sintering of MgO‐CaMgSiO 4 at 1650°C in O 2 and N 2 atmospheres has been studied. When 90MgO‐ 10Ca MgSiO 4 specimens containing artificially produced large spherical pores are sintered in O 2 , the liquid and grains flow into the pores as oxygen diffuses…
Abstract The oxidation of polycrystalline and (100) Cr at temperatures from 550–900°C and 5 × 10 −3 to 5 × 10 −1 torr oxygen pressure, choosing surface pretreatments such that only adherent, uniform, pore‐free polycrystalline α‐Cr 2 O 3 is produced, show long term parabolic growth kinetics with an activation energy ∽…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamic slowing down of mutual diffusion in isotopic polymer mixturesP. F. Green and B. L. DoyleCite this: Macromolecules 1987, 20, 10, 2471–2474Publication Date (Print):October 1, 1987Publication History Published online1 May 2002Published inissue 1 October 1987https:…
The substantial increases in the filler volume fraction of the current generation of composite resins, and the incorporation of radiopacifying heavy elements in many of these fillers, constitute significant changes which may affect thermal transport properties. Thermal diffusivity has been determined for 21 of these c…
The structures of seven olivines of various compositions in the system Ni2Si04-Mg2 Si04 have been investigated by single-crystal X-ray diffraction methods. Crystals with inter mediate compositions were synthesized at 900•c. To avoid zoning, the temperature was kept constant throughout the entire preparation period.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetailed study of a two-step quintet .dblharw. singlet spin transition in an iron(II) complex with a N3O2 macrocyclic ligand and the kinetics of the quintet .fwdarw. singlet relaxation in the temperature range 115-130 KE. Koenig, G. Ritter, J. Dengler, and S. M. NelsonCite t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcid-catalyzed condensation of model hydroxyl-terminated dimethylsiloxane oligomers - cyclization vs. linear condensation: intra-inter catalysisJ. Chojnowski, S. Rubinsztajn, and L. WilczekCite this: Macromolecules 1987, 20, 10, 2345–2355Publication Date (Print):October 1, 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBand electronic structure of the purple potassium molybdenum bronze K0.9Mo6O17Myung Hwan Whangbo, Enric Canadell, and Claire SchlenkerCite this: J. Am. Chem. Soc. 1987, 109, 21, 6308–6313Publication Date (Print):October 1, 1987Publication History Published online1 May 2002Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of substituent distribution in cellulose ethers by means of a carbon-13 NMR study on their acetylated derivatives. 1. MethylcelluloseYasuyuki Tezuka, Kiyokazu Imai, Mitsuyoshi Oshima, and Toru ChibaCite this: Macromolecules 1987, 20, 10, 2413–2418Publication Da…
Abstract Imogolite was synthesized at 25°C by aging partially neutralized solutions containing monomeric silicic acid and polymeric hydroxy-aluminum ions for 7 years. Solutions having an initial Si/Al molar ratio of about 0.5 and pHs of 4.0–4.5 produced the largest yields of imogolite, followed by those having an init…
The problem of large deformation and eventual collapse (or growth to a final shape, depending on the microstructure and loading) of voids in a crystalline solid which undergoes plastic flow by slip on crystallographic planes is considered and solved analytically for plane problems, using certain reasonable simplifying…
Etude du comportement thermique des atomes dans AgI β (structure de type wurtzite) par diffraction RX a 123, 297, 363 et 413 K. Determination des parametres de position precis et calcul de la fonction de densite de probabilite