Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and chemistry of a dinuclear iridium bis-.mu.-oxo complex. Observation of oxygen transfer and phosphorus-carbon bond cleavageWilliam D. McGhee, Thomas. Foo, Frederick J. Hollander, and Robert G. BergmanCite this: J. Am. Chem. Soc. 1988, 110, 25, 8543–8545Publicatio…
Abstract Linear low density (LLDPE) and high density (HDPE) polyethylenes were reinforced with wood fibers of aspen chemithermomechanical (CTMP) pulp. The different isocyantes: (i) polymethylene (polyphenyl isocyanate), (ii) tolene –2–4‐diisocyanate, (iii) 1–6 hexamethylene‐diisocyanate, and (iv) ethyl isocyanate used…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic and electrical properties of VO(dmit)2 and V(dmit)3 anion complexes and x-ray crystal structure of [NMP]2[V(dmit)3] (dmit = 2-thioxo-1,3-dithiole-4,5-dithiolate, NMP = N-methylphenazinium)Genetsu Matsubayashi, Kazuki Akiba, and Toshio TanakaCite this: Inorg. Ch…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSorption and diffusion of alcohols in heteropoly oxometalates and ZSM-5 zeoliteV. S. Nayak and J. B. MoffatCite this: J. Phys. Chem. 1988, 92, 25, 7097–7102Publication Date (Print):December 1, 1988Publication History Published online1 May 2002Published inissue 1 December 198…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron donor-acceptor properties of porphyrins, phthalocyanines, and related ring chelates: a molecular orbital approachC. Fierro, A. B. Anderson, and D. A. SchersonCite this: J. Phys. Chem. 1988, 92, 24, 6902–6907Publication Date (Print):December 1, 1988Publication Histor…
Abstract Our previous publication on this subject has dealt with the processing history effects on the crystallization rate of nylon 6 from the molten state. In this manuscript we present some insights into the molecular origin of the observed effects. Based on the available experimental data, we hypothesize that melt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the thermal dehydration of potassium copper(II) chloride dihydrateHaruhiko Tanaka and Nobuyoshi KogaCite this: J. Phys. Chem. 1988, 92, 24, 7023–7029Publication Date (Print):December 1, 1988Publication History Published online1 May 2002Published inissue 1 Decembe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleFormation of highly oriented graphite from poly(acrylonitrile) prepared between the lamellae of montmorilloniteNaohiro Sonobe, Takashi Kyotani, Yoshihiro Hishiyama, Minoru Shiraishi, and Akira TomitaCite this: J. Phys. Chem. 1988, 92, 24, 7029–7034Publication Date (Print):Decemb…
The synthesis is reported of fifteen three-ring 2,5-disubstituted pyridines and two pyridine-N-oxides where the pyridine rings carry a variety of alkyl, aryl, cyclohexyl, cyclohexylethyl and fluorinated-aryl substituents. The mesomorphic transition temperatures for these compounds have been measured; all the compounds…
A mean-field Green function theory is developed for investigating the dynamics of entangled rod-like polymers in solutions. We regard the hindrance of surrounding rods as a multiple (sequential) perturbation to the free transverse or lateral diffusion of a test rod (a rod in consideration) and incorporate the effects…
The atomic and electronic structures of amorphous and crystalline Mg-Zn alloys are studied by computer simulation, electronic band-structure calculations and photoemission measurements. The spectra for the metallic glasses and for pure crystalline zinc show a narrow band of Zn 3d states centred at a binding energy E B…
Abstract The oxygen glow discharge plasma modification of a contact lens material has been studied using SSIMS. SSIMS provides evidence at the molecular level for the conversion of surface organosiloxane species to inorganic silica functionalities with treatment time. These findings shown an excellent correlation with…
The formation process of barium hexaaluminate (BaO 6Al 2 O 3 ) from BaCO 3 /γ‐Al 2 O 3 powders or hydrolyzed alkoxides was studied by analytical electron microscopy. Barium hexaaluminate is produced by a two‐step solid‐state reaction from BaCO 3 and Al 2 O 3 via formation of BaO·Al 2 O 3 . Marked grain growth and incl…
Abstract Dry grinding of pyrophyllite (Hillsboro, USA) has been studied by X-ray diffraction (XRD), specific surface area measurements (BET) and scanning electron microscopy (SEM). At the beginning of the grinding process, some effects such as delamination, gliding and folding of the layers, and decrease in particle s…
The present work investigates the acoustical absorption and scattering cross sections of spherical bubble clouds subject to harmonic farfield pressure excitation. Bubble dynamics effects and energy dissipation due to viscosity, heat transfer, liquid compressibility, and relative motion of the two phases are included.…
Abstract Diffusion of K during analytical electron microscopy (AEM) results in anomalously low count rates for this element. As the analysis area and specimen thickness decrease, count rates become disproportionally lower. Adularia and muscovite show different diffusion profiles during AEM; for muscovite a strong depe…
Monosized, spherical Y 2 O 3 was processed from raw commercial Y 2 O 3 by homogeneous precipitation in aqueous solution via urea decomposition. Dry‐pressed pellets of the synthesized and raw powders were sintered to 1500°, 1600°, and 1700°C for 7 to 720 min. Microstructural development was followed with scanning elect…
Abstract Pillared smectites in which the pillars consist of iron oxide are expected to have interesting and unusual magnetic properties. Several possible routes by which such materials might be made have been investigated, namely intercalation of hydroxy-Fe(III) polycations, mixed hydroxy-Fe(III)/Al polycations, phena…
Abstract Nonlinear optical properties of semiconductor‐doped glasses are reviewed. A growth technique enabling to obtain semiconductor microcrystals with controlled sizes grown in a glassy matrix is described. It is shown that the optical properties of such systems are determined by the energy spectrum of the electron…
Diffusion and reaction in porous heterogeneous catalysts has been a subject of intensive investigation for almost half a century. Major summary works were published by Wheeler in 1951 and 1955 [1, 2], by Satterfield and Sherwood in 1963 [3], by Satterfield again in 1970 [4], and by Aris in 1975 [5, 6]. Recent years ha…