Materials Literature
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The electrochemistry and photoelectrochemistry of nominal one monolayer coverages of RuO 2 deposited by thermal decomposition of RuCl 3 on anodically grown TiO 2 films are examined. The anodic TiO 2 films, characterized by electron diffraction before and after thermal treatment, were found to be polycrystalline rutile…
Nonlinear acoustic effects associated with collective dynamics of bubbles in a liquid are considered in this article. The mechanism of nonlinearity is caused by the variation of the bubble concentration in space due to bubble drift under the effect of radiation pressure and hydrodynamic (Bjerknes) forces (the latter m…
Abstract Gibbsite samples of various particle sizes (0.2–80 μ m) were heated at 250°C in a series of straight-chain primary alcohols under the autogenous vapor pressure of the alcohol (alcohothermal treatment of gibbsite). The treatment in ethanol yielded pure boehmite, the morphology of which was similar to that of t…
A major consideration in autobody application of coated sheets is paint performance on electrogalvanized coatings. This paper describes a study in which a number of electrogalvanized coatings, including Zn, 9%Ni-Zn, 13%Ni-Zn, and 18%Fe-Zn, were characterized for composition, structure, and phosphatability and compared…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTunneling in spin-state interconversion of ferrous spin-crossover complexes. Concentration dependence of apparent activation energy determined in solution by laser-flash photolysisAndrew J. Conti, Chuan Liang Xie, and David N. HendricksonCite this: J. Am. Chem. Soc. 1989, 11…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe ternary system magnesium-cobalt-hydrogenE. Yu. Ivanov, I. G. Konstanchuk, A. A. Stepanov, Yan Jie, M. Pezat, and B. DarrietCite this: Inorg. Chem. 1989, 28, 3, 613–615Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published inissue…
Dielectric and polarization measurements were made on single crystal ${\mathrm{BaTiO}}_{3}$ in a hydrostatic medium to 38 kbar. The nature of the ferroelectric phase transition is observed to go from first to second order near 35 kbar and -40 \ifmmode^\circ\else\textdegree\fi{}C. The pressure--temperature--electric-fi…
The pore structure of cotton was followed through three pretreatments that com monly precede chemical modification for imparting easy care or other functional properties. These treatments included scouring/bleaching, caustic mercerization, and a liquid ammonia treatment with removal by volatilization at elevated tempe…
The low‐temperature (100° to 400°C) tetragonal to monoclinic transformation in yttria‐doped tetragonal zirconia (Y‐TZP) can be inhibited by a postsintering grinding and annealing treatment. The surface region so treated contains fine tetragonal grains which have recrystallized from the severely damaged ground surface.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe kinetics for the reaction of hypochlorite with a manganese(III) porphyrin and subsequent epoxidation of alkenes in a homogeneous solutionRobert W. Lee, Paul C. Nakagaki, and Thomas C. BruiceCite this: J. Am. Chem. Soc. 1989, 111, 4, 1368–1372Publication Date (Print):Febr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular weight distribution of a branched epoxy polymer: 1,4-butanediol diglycidyl ether with cis-1,2-cyclohexanedicarboxylic anhydrideChi Wu, Ju Zuo, and Benjamin ChuCite this: Macromolecules 1989, 22, 2, 633–639Publication Date (Print):February 1, 1989Publication History…
The type and frequency of grain boundaries, the so-called grain boundary character distribution (GBCD), has been determined in rapidly solidified and subsequently annealed Fe-6·5 mass% Si alloy ribbon by the scanning electron microscopy-electron channelling pattern (SEM-ECP) technique. High frequencies of low-angle bo…
The mechanical properties of high‐toughness magnesia‐partially‐stabilized zirconia were found to be dramatically altered by a single cooling cycle between room temperature and − 196°C. Raman spectroscopy and X‐ray diffraction were used to correlate the changes in mechanical properties with structural changes that occu…
Abstract Blends of crystallizable poly(vinyl alcohol) (PVA) with poly( N ‐vinyl‐2‐pyrrolidone) (PVP) made from aqueous solutions appear to be miscible in the whole composition range according to DSC results. A large negative value of the interaction parameter between the two polymers was found from melting point depre…
A computer model that treats ceramic‐powder matrix–ceramic whisker composites as a percolative network of whiskers has been developed. The model calculates the critical fraction of whiskers at the percolation threshold for a two‐dimensional random network of whiskers. The computed critical fraction was found to displa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid crystalline polyethers based on conformational isomerism. 2. Thermotropic polyethers and copolyethers based on 1-(4-hydroxyphenyl)-2-(2-methyl-4-hydroxyphenyl)ethane and flexible spacers containing an odd number of methylene unitsVirgil Percec and Raymond YourdCite th…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility and immiscibility of polyamide blendsThomas S. EllisCite this: Macromolecules 1989, 22, 2, 742–754Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published inissue 1 February 1989https://pubs.acs.org/doi/10.1021/ma00192a039h…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical gels from PVC: aging and solvent effects on thermal behavior, swelling, and compression modulusP. H. Mutin and J. M. GuenetCite this: Macromolecules 1989, 22, 2, 843–848Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published…
We have developed a new microwave plasma torch (MW plasma jet), which can generate a pure H2 plasma jet at atmospheric pressure from the end of a center electrode with an input power above 2 kW. The electric field has maximum strength at the end of the electrodes, so the plasma is initially ignited by the electric bre…
Abstract Studies of lamellar shapes and profiles in linear polyethylene have often been implemented by microscopic examination of appropriately etched random slices through spherulitic specimens. However, since a spherulite crystallized from a bulk specimen is a three‐dimensional assembly of radially oriented lamellae…