Tadashi Sugano、Takashi Hashida、Akiko Kobayashi 等 5 位作者1988-07-01Bulletin of the Chemical Society of Japan
Abstract The semiconductive 2:1 charge-transfer complex between benzo[1,2-c:3,4-c′:5,6-c″]trithiophene and 2,2′-(2,3,5,6-tetrafluoro-2,5-cyclohexadiene-1,4-diylidene)bis[propanedinitrile], (BTT)2(TCNQF4), crystallizes in the monoclinic system, space group P21⁄c, with the following cell constants: a=8.893(2) Å, b=10.58…
Magnetism in coordination complexesOrganic and Molecular Conductors ResearchOrganic Chemistry Cycloaddition Reactions
Analicia Hinojosa Padilla、Antonio Sánchez-Solís、Ο. Manero1988-07-01Journal of Composite Materials
The thermal conductivity of a composite formed by sand fillers embedded in a poly ethylene matrix is studied experimentally. Results show a region of low particle content, where the conductivity is predicted by Maxwell-Eucken equation. Only at very high par ticle content, the filler tends to form agglomerates and cond…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesRheology and Fluid Dynamics Studies
JOHN T. KELLER、Dinesh Agrawal、H. A. McKinstry1988-07-01Advanced Ceramic Materials
ZnAl{sub 2}O{sub 4} spinel was prepared by both the sol-gel method and by the solid-state reaction technique. Physical properties of the product obtained by the two methods are compared. Sol-gel-derived ZnAl{sub 2}O{sub 4} showed evidence of crystals at as low as 264{degree}C. Quantitative x-ray diffraction (XRD) meth…
Advanced ceramic materials synthesisX-ray Diffraction in CrystallographyPigment Synthesis and Properties
Jean Roncali、Robert Garreau、Didier Delabouglise 等 5 位作者1988-07-01Makromolekulare Chemie Macromolecular Symposia
Abstract The mechanism of the electropolymerization of thiophene derivatives has been investigated by varying the electrosynthesis conditions and the monomer structure. The results of these analyses led to the definition of optimized electrosynthesis conditions allowing the control of the electrical and electrochemica…
Electrochemical sensors and biosensorsConducting polymers and applicationsElectrochemical Analysis and Applications
I. P. Raevski、S. T. Kirillov、Malitskaya 等 6 位作者1988-07-01Inorg. Mater. (Engl. Transl.); (United States)
The purpose of this work was to determined the value of spontaneous polarization accurately and to obtain additional information about phase transitions in perovskite lead ferroniobate, in particular, about the effect on the electric characteristics of the ceramic. The measured values of the spontaneous polarization o…
Multiferroics and related materialsSolid-state spectroscopy and crystallographyAdvanced Energy Technologies and Civil Engineering Innovations
Bernard Monasse、Jean Marc Haudin1988-07-01Makromolekulare Chemie Macromolecular Symposia
Abstract The growth rates of two poly(1‐butene) with different molecular weights have been deduced from microscopic observations and the corresponding morphologies have been described. In both polymers two changes in the growth regime are observed and interpreted according to Hoffman's kinetic theory of polymer crysta…
Polymer crystallization and propertiesPolymer Nanocomposites and Propertiesbiodegradable polymer synthesis and properties
M. C. Valente Lopes、A. M. Figueiredo Neto1988-07-01Physical Review A
The influence of the microscopic shape anisotropy of the micelles on the pitch of a cholesteric lyotropic liquid crystal is investigated by x-ray diffraction and optical techniques. The mixture studied is potassium laurate, decanol, water, and brucine sulfate. The relative molar concentration of the brucine sulfate is…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMolecular spectroscopy and chirality
Yoshiro Yamashita、Takaaki Hanaoka、Yasuyuki Takeda 等 5 位作者1988-07-01Bulletin of the Chemical Society of Japan
Abstract 2,3-Dipyridylnorbornadienes were prepared using the Diels–Alder reaction of the HBF4 salts of dipyridylacetylenes with cyclopentadiene. Their absorptions extend to 380 nm and are red-shifted in an acidic media. They underwent photocyclization to give quadricyclanes which reverted to norbornadienes upon heatin…
Radical Photochemical ReactionsPorphyrin and Phthalocyanine ChemistryOxidative Organic Chemistry Reactions
J. Grigas、V. Kalesinskas、S. Lapinskas 等 4 位作者1988-07-01Phase Transitions
This paper presents the results of the investigation of dielectric dispersion in semiconductive ferroelectric Sn2P2S6 crystals over the frequency range 1 kHz to 78.5 GHz. The main dielectric dispersion in Sn2P2S6 is caused by the soft ferroelectric Bu mode and in the vicinity of the Curie point it occurs in the millim…
Crystal Structures and PropertiesAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography
Inn‐Kyu Kang、Yoshihiro Ito、Masahiko Sisido 等 4 位作者1988-07-01Journal of Biomedical Materials Research
The effect of wettability of 14 polypeptide derivatives upon adhesion and activation of platelets was investigated with reference to release reactions from adhered platelets, using radioisotope labeling and radioimmunoassay method. The serotonin release was more significant from platelets adhered to polymer materials…
Surface Modification and SuperhydrophobicityPlatelet Disorders and TreatmentsPolymer Surface Interaction Studies
Mary Helen McCay、T. D. McCay1988-07-01Journal of Thermophysics and Heat Transfer
An experimental study to evaluate and characterize the effects of inverted density layers during the directional solidification of metal alloys is described. The temporal history of the inverted density layers in front of a dendritic interface for directionally solidified ammonium-chloride 72-wt-% water is presented b…
Solidification and crystal growth phenomenaMetallurgical Processes and ThermodynamicsFluid Dynamics and Thin Films
Martin Kunz、Martin Möller、U.‐R. Heinrich 等 4 位作者1988-07-01Makromolekulare Chemie Macromolecular Symposia
Abstract Discrimination of elastically and inelastically scattered electrons in transmission electron microscopy (TEM) yields electron micrographs with enhanced and specific contrast. Highly resolved micrographs can be obtained in which the contrast reflects the local concentrations of specific elements. In the presen…
Corrosion Behavior and InhibitionAdvanced Electron Microscopy Techniques and ApplicationsElectron and X-Ray Spectroscopy Techniques
T. C. Choy、J. D. Fitz Gerald、Alexander C. Kalloniatis1988-07-01Philosophical Magazine B
A proposal to abandon the current sophisticated index scheme of the Al-Mn decagonal phase has recently been advanced (Fitz Gerald, Withers, Stewart and Calka 1987), in favour of a new straightforward description. This description is based on a periodic stacking of Penrose lattices which are two-dimensional, using the…
Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesQuasicrystal Structures and Properties
Norbert Krause、Dieter Seebàch1988-07-01Chemische Berichte
Abstract Epoxides bearing aryl, alkenyl, alkynyl, and trimethylsilyl substituents react with titanium acetylides at the higher substituted carbon atom exclusively; the 2‐substituted 3‐butyn‐1‐ols thus formed are isolated in 33–79% yield. The dependence of the yield on the solvent, the ratio of the reactands, and their…
Asymmetric Synthesis and CatalysisFluorine in Organic ChemistryPolyoxometalates: Synthesis and Applications
J. Hébert、E. K. Boylston、Devron P. Thibodeaux1988-07-01Textile Research Journal
Neps appearing in all stages of textile processing up to the dyed fabric were extracted from cotton samples. These neps were disassembled and the individual fibers making up each nep, along with any foreign material appearing in the nep, were studied using microscopic techniques. Three distinct types of neps could be…
Textile materials and evaluations
Wen‐Kuei Huang、Ging‐Ho Hsiue、Wei‐Hsin Hou1988-07-01Journal of Polymer Science Part A Polymer Chemistry
Abstract The rates of epoxidation of polybutadiene homopolymers and styrene–butadiene triblock copolymers with monoperoxyphthalic acid were measured at four temperatures in homogeneous solution. Dioxane and mixed solvents with chloroform were used as reaction media. Activation energy values were also calculated for po…
Conducting polymers and applicationsPolymer composites and self-healingPolyoxometalates: Synthesis and Applications
Norbert V. DeByle、Robert W. Hennes、George E. Hart1988-07-01Soil Science
In a laboratory setting, 10 new ceramic cup soil solution samplers, 10 samplers used 1 yr, and 10 used 6 yr were tested for consistency and uniformity of results. The new cups were flushed with acid and distilled water. The ceramic cups that had been installed in the field 6 yr produced samples with Mg, Na, NO3, and K…
Groundwater and Isotope GeochemistrySoil and Unsaturated FlowClay minerals and soil interactions
Richard M. Podhajny1988-07-01Journal of Plastic Film & Sheeting
A summary of recent studies on the corona treatment of films is presented. Chemi cal functional groups generated by the corona discharge on these films are identified and their effect on mk film wettability and adhesion discussed.
Surface Modification and SuperhydrophobicityPlasma Applications and DiagnosticsElectrohydrodynamics and Fluid Dynamics
Bao‐Shun Li、J.S. Cherng、Keith J. Bowman 等 4 位作者1988-07-01Journal of the American Ceramic Society
Evidence for a toughening contribution from domain switching, a deformation mode akin to twinning, has been sought in uniaxial tension and compression, biaxial compression, and on the fracture surfaces of several tetragonal zirconia polycrystalline (TZP) ceramics. Only in biaxial compression was domain switching found…
Advanced ceramic materials synthesisRock Mechanics and ModelingAdvanced materials and composites
E. M. Lehockey、I. Reid、Ian G. Hill1988-07-01Journal of Vacuum Science & Technology A Vacuum Surfaces and Films
Poly(methyl methacrylate) (PMMA) films of approximately 2.5 μm have been irradiated to various doses using Al x rays. The effect of this irradiation is shown by monitoring the variation in intensity of the Raman vibrational bands of the major constituent species of PMMA, as a function of dose. It is shown that at low…
Nuclear Materials and PropertiesAdvancements in Photolithography TechniquesNuclear materials and radiation effects