Virgil Percec、M. Lee1991-03-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular engineering of liquid-crystal polymers by living polymerization. 3. Influence of molecular weight on the phase transitions of poly{8-[(4-cyano-4'-biphenyl)oxy]octyl vinyl ether} and of poly{6-[4-cyano-4'-biphenyl)oxy]hexyl vinyl ether}V. Percec and M. LeeCite this:…
Liquid Crystal Research AdvancementsSynthesis and properties of polymersChemical Thermodynamics and Molecular Structure
Jerry L. Atwood、G. William Orr、Fumio Hamada 等 6 位作者1991-03-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSecond-sphere coordination of transition-metal complexes by calix[4]arenesJerry L. Atwood, G. William Orr, Fumio Hamada, Rebecca L. Vincent, Simon G. Bott, and Kerry D. RobinsonCite this: J. Am. Chem. Soc. 1991, 113, 7, 2760–2761Publication Date (Print):March 1, 1991Publicat…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
V. Z. Gochiyaev、V. K. Malinovsky、V. N. Novikov 等 4 位作者1991-03-01Philosophical Magazine B
An experimental investigation has been performed of the Rayleigh linewing in glass-forming liquids in the temperature rangefrom the melting point down to the glass-transition point. The so-called boson peak is found to contribute substantially to the Rayleigh linewing, and to determine the spectral profile of the high…
Liquid Crystal Research AdvancementsGlass properties and applicationsPhase-change materials and chalcogenides
Gregory W. Smith、Emily A. Carter1991-03-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteractions of nitric oxide and carbon monoxide with palladium and platinum atomsGregory W. Smith and Emily A. CarterCite this: J. Phys. Chem. 1991, 95, 6, 2327–2339Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March…
Catalytic Processes in Materials ScienceDiamond and Carbon-based Materials ResearchPorphyrin and Phthalocyanine Chemistry
Aaron D. Johnson1991-03-01Journal of Micromechanics and Microengineering
Thin-film nickel-titanium shape memory alloy has been vacuum sputter deposited, characterized by crystallographic, electrical, and mechanical tests, and incorporated as an actuator in miniature devices. The composition and heat treatment of the film are critical as contamination by oxygen and other species affects the…
Shape Memory Alloy Transformations
Jonathan V. Selinger、Robijn Bruinsma1991-03-01Physical Review A
We consider the statistical mechanics of a system of semiflexible chains, which can represent polymer liquid crystals, long-chain biomolecules, stiff wormlike micelles, or columns of discotic liquid crystals. Semiflexible chains can order in a hexagonal lattice (also called a columnar or canonic phase), and they can f…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesSurfactants and Colloidal Systems
Fred C. Anson、David N. Blauch、Jean Michel Savéant 等 4 位作者1991-03-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon association and electric field effects on electron hopping in redox polymers. Application to the tris(2,2'-bipyridine)osmium(3+)/tris(2,2'-bipyridine)osmium(2+) couple in NafionFred C. Anson, David N. Blauch, Jean Michel Saveant, and Ching Fong ShuCite this: J. Am. Chem.…
Fuel Cells and Related MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors
J. M. D. Coey、J.F. Lawler、Hong Sun 等 4 位作者1991-03-01Journal of Applied Physics
The reaction between nitrogen gas and the series of R2Fe17 intermetallic compounds is studied by thermopiezic analysis on micron-size powders. Nitrogen diffusion in the range 300–550 °C can be represented by an activated interstitial diffusion process D=D0e−Em/kT with D0=1.95×10−10 m2 s−1 and an activation energy Em=0…
Rare-earth and actinide compoundsHydrogen Storage and MaterialsMagnetic Properties of Alloys
Show An Chen、Woei Guwn Fang1991-03-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrically conductive polyaniline-poly(vinyl alcohol) composite films: physical properties and morphological structuresShow An Chen and Woei Guwn FangCite this: Macromolecules 1991, 24, 6, 1242–1248Publication Date (Print):March 1, 1991Publication History Published online1…
Conducting polymers and applications
Weiyi Jia、Huimin Liu、S. Jaffe 等 5 位作者1991-03-01Physical review. B, Condensed matter
Fluorescence and site-selective excitation spectra of chromium-activated forsterite at 10 K are reported. It is found that a high-field ${\mathrm{Cr}}^{3+}$ site in inversion symmetry emits sharp ${\mathit{R}}_{1}$ line fluorescence, while a low field ${\mathrm{Cr}}^{3+}$ site in mirror symmetry produces $^{4}$${\math…
Glass properties and applicationsCrystal Structures and PropertiesMineralogy and Gemology Studies
Naoki Karasawa、Siddharth Dasgupta、William A. Goddard1991-03-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanical properties and force field parameters for polyethylene crystalNaoki Karasawa, Siddharth Dasgupta, and William A. Goddard IIICite this: J. Phys. Chem. 1991, 95, 6, 2260–2272Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Publishe…
Mechanical Behavior of CompositesPolymer crystallization and propertiesMaterial Properties and Applications
Yiannis S. Sdranis、Marios K. Kosmas1991-03-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the conformational behavior of an ABC triblock copolymer moleculeY. S. Sdranis and M. K. KosmasCite this: Macromolecules 1991, 24, 6, 1341–1351Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991https://pubs.ac…
Advanced Polymer Synthesis and CharacterizationBlock Copolymer Self-AssemblyDendrimers and Hyperbranched Polymers
A.M. Campbell1991-03-01IEEE Transactions on Magnetics
The bulk magnetic properties of sintered materials are treated as those of a standard magnetic material with a permeability dependent on the porosity. If J/sub c/ is expressed as a function of the internal H instead of the applied field, it is much more constant. The flux profile technique can then be used to extract…
Physics of Superconductivity and MagnetismMagnetic properties of thin filmsMagnetic Properties and Applications
Joe E. Maskasky1991-03-01Physical review. B, Condensed matter
The AgI thermal transition of the \ensuremath{\beta} phase (wurtzite structure) to the \ensuremath{\alpha} phase (body-centered-cubic structure) occurred at a higher temperature (162 \ifmmode^\circ\else\textdegree\fi{}C) than that previously reported (\ensuremath{\sim}147 \ifmmode^\circ\else\textdegree\fi{}C). It is b…
Quantum Dots Synthesis And PropertiesMaterial Dynamics and Propertiesnanoparticles nucleation surface interactions
Harald Bothe、Arnulf‐Dieter Schl üter1991-03-01Chemische Berichte
The synthesis (up to the 10‐g scale) and purification of alkyl‐ and methoxyalkyl‐substituted [1.1.1]propellanes are described.
Porphyrin and Phthalocyanine ChemistrySynthesis and Properties of Aromatic CompoundsPhotochromic and Fluorescence Chemistry
P. Rupanagunta、J.S. Hsu、W.F. Weldon1991-03-01IEEE Transactions on Magnetics
The core loss for a magnetic material under excitation can be estimated from the flux density versus the field-strength loops or B-H loops. A method is presented for predicting the position, size, and number of minor loops formed in the B-H loop, while harmonics of known magnitude and phase angle occur along with the…
Electric Motor Design and AnalysisMagnetic Properties and ApplicationsNon-Destructive Testing Techniques
Moses David、R. Padiyath、S. V. Babu1991-03-01AIChE Journal
Abstract Diamond‐like carbon films have been deposited from ternary mixtures of butadiene, hydrogen and argon in a parallel plate plasma reactor at constant pressure and power. These films have been etched in O 2 and CF 4 /O 2 plasma discharges. A new linear relationship between the composition of the deposition gas m…
Metal and Thin Film MechanicsSemiconductor materials and devicesDiamond and Carbon-based Materials Research
Jonathan Ayala、W. M. Hess、F. D. Kistler 等 4 位作者1991-03-01Rubber Chemistry and Technology
Abstract A number of different techniques were applied to measure carbon-black-surface reactivity and the level of black-polymer interaction in four different elastomer systems (SBR, IIR, NR, and NBR) representing differences in unsaturation, crystallinity and polarity. Known within-grade surface activity variations w…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesTribology and Wear Analysis
Jane E. G. Lipson1991-03-01Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolymer blends and polymer solutions: a Born-Green-Yvon integral equation treatmentJ. E. G. LipsonCite this: Macromolecules 1991, 24, 6, 1334–1340Publication Date (Print):March 1, 1991Publication History Published online1 May 2002Published inissue 1 March 1991https://pubs.ac…
Polymer Nanocomposites and PropertiesPolymer Science and PVC
H. Wöhler、M. Fritsch、Günther Haas 等 4 位作者1991-03-01Journal of the Optical Society of America A
Berreman’s 4 × 4 matrix method is used to study the optical properties of special configurations. Under certain conditions the expression for the characteristic matrix of a homogeneous anisotropic slab can be greatly simplified. If these conditions are also fulfilled for each slab of a multilayered system, relations b…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsOptical Polarization and Ellipsometry