Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of heterogeneous surface geometry on adsorptionAlon Seri-Levy and David AvnirCite this: Langmuir 1993, 9, 11, 3067–3076Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.…
${\mathrm{YFe}}_{12\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Mo}}_{\mathit{x}}$ (x=1 and 3) and full-charged nitrides were prepared. Neutron-powder-diffraction experiments were performed at 10 K and room temperature on both the host compounds and their nitrides. The Rietveld technique was used for data analysis. Mo…
The pressure dependence of the helix-to-coil transition temperature (Tm) of poly[d(A-T)], poly(dA).poly(dT), and poly(dA).poly(dT)2 was studied as a function of sodium chloride concentration. The molar volume change of the transition (delta V) was calculated using the Clapeyron equation and calorimetrically determined…
Two types of deformation twinning intersections (which type depends on the orientation of the intersection line) have been observed by transmission electron microscopy in Ti-50 at.% Al-2 at.% Mn-1 at.% Nb alloy deformed at room temperature. It is found that the two types of intersection can be accomplished by basal or…
Abstract The reaction of methylaluminoxane (MAO) with 1,6‐hexanediol or 1,10‐decanediol leads to white powdery materials which were studied by 13 C and 27 Al MAS NMR, scanning electron microscopy (SEM), and whose surface area and porosity was determined according to the BET method. The hydrolysis of trimethylaluminum…
ADVERTISEMENT RETURN TO ISSUEPREVArticleLiquid-crystalline fluorocarbon-hydrocarbon microblock polymersL. M. Wilson and A. C. GriffinCite this: Macromolecules 1993, 26, 23, 6312–6314Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.…
Abstract Ring‐opening polyaddition of a saccharic acid dilactone prepared from D‐glucose, D‐glucaro‐1,4 : 6,3‐dilactone, with several alkylenediamines proceeded at room temperature with no catalyst. The resulting new polyamides carrying many pendant hydroxyl groups, poly(alkylene D‐glucaramide)s, were more amorphous a…
In the optimization of multilayer stacks for various optical filtering purposes not only the thicknesses of the thin films are to be optimized, but also the sequence of materials. Materials with very different optical properties, such as metals and dielectrics, may be combined. A genetic algorithm is introduced to sea…
Microtwin sequences in thermoelastic NixAl100-x martensite plates of different size and composition (62·5↬x↬66·0) were investigated by conventional and highresolution electron microscopy. The average twin width increases with increasing twin length and with increasing Ni content. No systematic behaviour of the volume…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConvergent synthesis of starburst poly(ether ketone) dendronsAtsushi Morikawa, Masaaki Kakimoto, and Yoshio ImaiCite this: Macromolecules 1993, 26, 24, 6324–6329Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 Novembe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBrush formation from mixtures of short and long end-functionalized chains in a good solventEugenia Kumacheva, Jacob Klein, Philip Pincus, and Lewis J. FettersCite this: Macromolecules 1993, 26, 24, 6477–6482Publication Date (Print):November 1, 1993Publication History Publish…
Ultrafine particles surrounded by graphitic carbon layers have been produced by the arc burning of a composite carbon rod containing ZrC or VC. The size of the ultrafine particles is typically in the range of 20-40 nm in diameter and the number of graphitic carbon layers surrounding a core particle ranges from about 1…
Abstract Silica grafted hafnium hydride complexes were synthesized from tetra(neopentyl)hafnium and a partially dehydroxylated silica. These surface complexes are catalysts for hydrogenolysis of neopentane and butane and for hydrogenation of isobutene and propene, under mild conditions. Their catalytic properties are…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSyntheses, structures, 113Cd solution NMR chemical shifts, and investigations of fluxional processes of bis[poly(pyrazolyl)borato]cadmium complexesDaniel L. Reger, Scott S. Mason, Arnold L. Rheingold, and Robert L. OstranderCite this: Inorg. Chem. 1993, 32, 23, 5216–5222Publ…
Abstract The epoxidation of cyclohexene, 1-decene, and styrene by molecular oxygen in the presence of aldehydes such as isobutyraldehyde and pivalaldehyde was efficiently catalyzed at 303 K by mono-cobalt-substituted Keggin-type heteropolytungstate.
Abstract We detail the melting behavior of poly(ether ether ketone) (PEEK) and investigate its melting behavior in miscible blends with poly(ether imide) (PEI). The determination of the equilibrium melting point ( T m 0 ) of PEEK is discussed by considering its inhomogeneous morphology. T m 0 is obtained by a long ext…
peer reviewed
Measurements of dynamic hysteresis loops on Fe/sub 78/B/sub 13/Si/sub 9/ amorphous ribbons, in the range 0.5 Hz>
Structural changes in sol–gel‐derived TiO 2 –SiO 2 coatings were found to proceed in an environment of high temperature and high humidity as follows: (1) dissociation of Si–O–Ti bonds in the coating by the attack of water vapor, (2) formation of Ti–O–Ti bonds, and (3) nucleation and growth of anatase TiO 2 . The coati…
The crystallographic structures of carbide and nitride formed in TiAl containing carbon and nitrogen have been investigated using transmission electron microscopy. The needle-shaped carbide and nitride are formed parallel to only the [001] direction of the L10-ordered TiAl matrix. Detailed analyses in terms of selecte…