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Plasma treatment of polymers Effects of energy transfer from an argon plasma on the surface chemistry of poly(styrene), low density poly(ethylene), poly(propylene) and poly(ethylene terephthalate)

Richard M. France、Robert D. Short1997-01-01Journal of the Chemical Society Faraday Transactions

Argon plasma treatment followed by exposure to atmospheric oxygen has been used to introduce new carbon–oxygen functionalities to polymer surfaces. We report on the treatment of poly(styrene) (PS), low density poly(ethylene) (LDPE), poly(propylene) (PP) and poly(ethylene terephthalate) (PET). Argon plasma-treated poly…

Surface Modification and Superhydrophobicity

Phonon excitations in quasicrystals

M. Quilichini1997-01-01Reviews of Modern Physics

Recent progress concerning lattice dynamics in quasicrystals, both theoretical and experimental, is discussed. The theory deals with the general description, which differs from that for ordinary crystals, and with model calculations and rigorous results for one-, two-, and three-dimensional systems. Experimental resul…

Quasicrystal Structures and PropertiesMineralogy and Gemology Studies

Models of magnetic hysteresis based on play and stop hysterons

S. Bobbio、Giuseppe Milano、C. Serpico 等 4 位作者1997-01-01IEEE Transactions on Magnetics

This paper deals with mathematical models of magnetic hysteresis implemented by assembling hysterons of play and stop type. A procedure for the identification of these models is described, and their behaviors are compared to experimental results. A comparison to the Preisach and Prandtl-Ishlinskii models is performed.…

Electric Motor Design and AnalysisMagnetic Properties and ApplicationsPiezoelectric Actuators and Control

Grain boundary diffusion: fundamentals to recent developments

Yu. M. Mishin、Chr. Herzig、J. Bernardini 等 4 位作者1997-01-01International Materials Reviews

Diffusion along grain boundaries (GBs) often controls the evolution of structure and properties of engineering materials at elevated temperatures. A knowledge of diffusion characteristics of GBs and deep fundamental understanding of this phenomenon are critical to many materials applications. The purpose of the presen…

Microstructure and mechanical propertiesFusion materials and technologiesHigh Temperature Alloys and Creep

Infrared temperature studies of a simple polyurea

Michael M. Coleman、Maria Sobkowiak、George J. Pehlert 等 5 位作者1997-01-01Macromolecular Chemistry and Physics

Abstract Infrared temperature studies of a polyurea formed from 2‐methylpentane‐1,5‐diamine and 4,4′‐methylenebis(phenyl isocyanate) are presented, together with those of two model diureas, 2‐methylpentane‐1,5‐diphenylurea and ethylene diphenylurea. The main thrust of the work concerns the interpretation of the infrar…

Polymer composites and self-healingSynthesis and properties of polymersPhotopolymerization techniques and applications

ANOLEA: a www server to assess protein structures.

Francisco Melo、Damien P. Devos、Eric Depiereux 等 4 位作者1997-01-01PubMed

ANOLEA (Atomic Non-Local Environment Assessment) is a www server that performs energy calculations at the atomic level in protein structures. The calculations involve the non-local interactions between all the heavy atoms of the twenty standard amino acids in the molecule. The input of the server is a PDB file contain…

Protein Structure and DynamicsMass Spectrometry Techniques and ApplicationsEnzyme Structure and Function

Epoxy-Based Nonlinear Optical Polymers from Post Azo Coupling Reaction

Xiaogong Wang、Jayant Kumar、Sukant K. Tripathy 等 6 位作者1997-01-01Macromolecules

A series of novel second-order nonlinear optical (NLO) polymers have been developed based on a precursor polymer prepared from the diglycidyl ether of Bisphenol A and aniline. The precursor polymer was postfunctionalized by azo coupling reaction and tricyanovinylation to form a number of NLO polymers with different co…

Liquid Crystal Research AdvancementsNonlinear Optical Materials ResearchSynthesis and properties of polymers

Polarization Behavior of High Temperature Solid Oxide Electrolysis Cells (SOEC)

Akihiko Momma、Tohru Kato、Yasuo Kaga 等 4 位作者1997-01-01Journal of the Ceramic Society of Japan

The behavior of solid oxide electrolysis cell was investigated as follows.(1) The asymmetry of i-V performance indicated the existence of the parallel reaction path in the hydrogen evolution reaction.(2) It is possible to operate the cell at high water decomposition rate (>82%) without a remarkable interference of con…

Advancements in Solid Oxide Fuel CellsChemical Looping and Thermochemical ProcessesCatalysis and Oxidation Reactions

Logarithmic frequency dependence of the piezoelectric effect due to pinning of ferroelectric-ferroelastic domain walls

Dragan Damjanović1997-01-01Physical review. B, Condensed matter

Pinning of the ferroelastic-ferroelectric domain walls on randomly distributed defects in ferroelectric ceramics leads to a field dependence of the piezoelectric coefficient that is analogous to the Rayleigh law for magnetic susceptibility. It is shown in this paper that the piezoelectric coefficient of a lead zircona…

Ferroelectric and Piezoelectric MaterialsUltrasonics and Acoustic Wave PropagationAcoustic Wave Phenomena Research

Nitrogen-containing carbon nanotubes

Rahul Sen、B. C. Satishkumar、A. Govindaraj 等 6 位作者1997-01-01Journal of Materials Chemistry

Carbon nanotubes containing small amounts of nitrogen are produced by the pyrolysis of aza-aromatics such as pyridine, methylpyrimidine and triazine over cobalt nanoparticles in an Ar atmosphere; good yields of such nanotubes are obtained by carrying out the pyrolysis of a mixture of pyridine and Fe(CO)5 in flowing Ar…

Carbon Nanotubes in CompositesGraphene research and applicationsEnergetic Materials and Combustion

Synthesis and electrical characterisation of doped perovskite titanates as potential anode materials for solid oxide fuel cells

Peter R. Slater、Duncan P. Fagg、John T. S. Irvine1997-01-01Journal of Materials Chemistry

This work reports the synthesis and electrical characterisation over a range of oxygen partial pressures (10–20–1 atm) of the A-site deficient perovskites Sr1–3x/2LaxTiO3–δ, with a view to establishing their potential as anode materials for solid oxide fuel cells. Single phase samples were observed for synthesis in ai…

Advancements in Solid Oxide Fuel CellsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of Oxides

Functional monomers and polymers

喜一 竹本、Raphael M. Ottenbrite、幹治 蒲池1997-01-01Marcel Dekker eBooks

Introduction polymeric catalysts photoresponsive polymers electrically conducting polymers and their applications as functional materials magnetic polymers oxygen-carrying and oxygen-permeating polymers polymeric inclusion complexes hydrophobic modification of poly(MA-CDA) to enhance biological activity a Novel biomat…

Synthesis and properties of polymers

A comparison between three methods for the determination of cation exchange capacity and exchangeable cations in soils

Henri Ciesielski、Thibault Sterckeman、M. Santerne 等 4 位作者1997-01-01Agronomie

— The object of this study is to compare the results obtained with three standardized methods of determination of cationic exchange capacity (CEC) and exchangeable cations (Ca, Mg, K) in soils. The three methods are based on different exchange reagents: cobalt hexamine (Cohex) trichloride, barium chloride and am…

Clay minerals and soil interactionsIron oxide chemistry and applicationsMine drainage and remediation techniques

Spontaneous helix formation in smectic liquid crystals comprising achiral molecules

Tomoko Sekine、Teruki Niori、Junji Watanabe 等 6 位作者1997-01-01Journal of Materials Chemistry

Spontaneous formation of two types of helical structure is observed in two smectic phases consisting of banana-shaped achiral molecules for the first time. Local optical resolution occurs to form spatially resolved helices of both handednesses.

Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPlant Reproductive Biology

High-Temperature Oxidation of Silicon Carbide and Silicon Nitride

Takayuki Narushima、Takashi Goto、T. Hirai 等 4 位作者1997-01-01Materials Transactions JIM

Oxidation behavior of silicon-based ceramics such as SiC and Si3N4 at high temperatures is important for their practical applications to structural or electronic materials. In the present paper two kinds of oxidation (passive and active) and active-to-passive transition of silicon-based ceramics were discussed thermod…

Advanced ceramic materials synthesisSemiconductor materials and devicesAdvanced materials and composites

Birefringent Thin Films and Polarizing Elements

Ian J. Hodgkinson、Qi Wu1997-01-01OpenAlex

This book describes the propagation of light in biaxial media, the properties of biaxial thin films, and applications such as birefringent filters for tuning the wavelength of dye lasers.A novel feature of the first part is the parallel treatment of Stokes, Jones, and Berreman matrix formalisms in a chapter-by-chapter…

Optical Coatings and Gratings

Evaluation Method of Delayed Fracture Property of High Strength Steels

Shingo Yamasaki、Toshihiko Takahashi1997-01-01鐵と鋼 : 日本鐡鋼協會々誌

To evaluate delayed fracture properties of martensitic bolt steels containing Cr, Mo, and V, the relationship between critical content for delayed fracture [Hc] and environmentally absorbed content [HE] in diffusible hydrogen have been investigated. The critical value [Hc] and the environmental value [HE] were determi…

Corrosion Behavior and InhibitionFatigue and fracture mechanicsHydrogen embrittlement and corrosion behaviors in metals

Atomistic simulation of the effect of molecular adsorption of water on the surface structure and energies of calcite surfaces

Nora H. de Leeuw、Stephen C. Parker1997-01-01Journal of the Chemical Society Faraday Transactions

Atomistic simulation techniques using potentials verified against the structure of ikaite, have been employed to study the molecular adsorption of water onto the stepped and planar calcite {104} surfaces as well as the {0001}, {100}, {101} and {110} surfaces. It was found that physisorption of water is energetically f…

Calcium Carbonate Crystallization and InhibitionMinerals Flotation and Separation TechniquesIron oxide chemistry and applications

Optical recognition of CO and H2 by use of gas-sensitive Au–Co3O4 composite films

Masanori Ando、Tetsuhiko Kobayashi、Sumio Iijima 等 4 位作者1997-01-01Journal of Materials Chemistry

Gold–cobalt oxide (Au–Co 3 O 4 ) composite films have been prepared by the sputter-deposition of gold onto a glass plate substrate followed by pyrolysis of spin-coated cobalt 2-ethylhexanoate. The films comprise small Au particles and Co 3 O 4 nanocrystals, and exhibit different and independent optical responses to CO…

Catalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsCatalysis and Oxidation Reactions

Correlated ion hopping in single-crystal yttria-stabilized zirconia

C. León、M. L. Lucı́a、J. Santamarı́a1997-01-01Physical review. B, Condensed matter

A study of the effect of correlated ion motion on the electrical conductivity relaxation in single-crystalline yttria-stabilized zirconia is presented. Complex admittance in the radio frequency range show power-law dependencies in the real part of the conductivity at high frequencies of the form ${\mathrm{\ensuremath{…

Glass properties and applicationsElectrochemical Analysis and ApplicationsSolid-state spectroscopy and crystallography