Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of Chain Entanglement on the Failure Modes in Block Copolymer Toughened InterfacesC. Creton, H. R. Brown, and V. R. DelineCite this: Macromolecules 1994, 27, 7, 1774–1780Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFerroelectric Behavior in Metal-Containing Liquid Crystals: A Structure-Activity StudyM. J. Baena, J. Barbera, P. Espinet, A. Ezcurra, M. B. Ros, and J. L. SerranoCite this: J. Am. Chem. Soc. 1994, 116, 5, 1899–1906Publication Date (Print):March 1, 1994Publication History Pu…
Fabrication of a photooptical switching device based on the photo-induced refractive index change of polymer film doped with photochromic compounds is described. 1,2-bis(2-methylbenzo[b]thiophen-3-yl) perfluorocyclopentene (BFCP) and 1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene (CMTE) were used as the photochr…
By simply placing a shadow mask between the target material and substrate, the particle (or droplet) problem peculiar to the excimer laser deposition technique was completely eliminated. It is tentatively called the “ eclipse method ”, in which the deposition proceeds through only diffusion. Mirrorlike YBa 2 Cu 3 O y…
Persistent spectral hole burning is observed in Sm(2+)-doped glasses at room temperature. The holes are burned in the (7)F(0) ? (5)D(0), (5)D(1) lines of the Sm(2+) ions in three kinds of fluoride glass. The dependence of the burning efficiency on the sample and on the burning intensity is measured. The intensity depe…
A new nonlinear optical polymer of phenoxy resin containing 2-cyano-5-(4-methoxyphenyl)-2,4-pentadienoate as a pendant group is synthesized. A high concentration (84%) of chromophores with a relatively high value of hyperpolarizability ( 50×10 -30 esu) is obtained. The corona-poled polymer film shows hypochromic shift…
Vanadium-base alloys of the V-Cr-Ti-Si system are attractive candidates for use as structural materials in fusion reactors. The vanadium-base alloys exhibit relatively low long-term activation, irradiation induced afterheat and neutron-induced helium transmutation rates. Because of favorable physical properties these…
Abstract The surface orientation and detailed defect microstructure of polycrystalline diamond can be observed in a scanning electron microscope through local changes in the surface conductivity. The electron contrast in uncoated samples is straightforward to distinguish when the rms surface roughness is less than abo…
This paper deals with a method for determining the complex permeability in analysis of hysteresis motors. The method assumes that the magnetic intensity distribution is sinusoidal in the direction of rotation. Analysis of the asynchronous speed of a hysteresis motor is then performed for cylindrical coordinates, using…
Abstract Polarized Raman spectra of BaCl 2 · 2H 2 O and their assignments are reported. The Raman intensity was analysed by means of the pair approximation and the many‐body interaction among induced dipoles. It was found that the many‐body treatment is more quantitative than the pair approximation, although the agree…
Abstract Crystallinity in PVC contributes significantly to the strength and resiliency of the polymer. Two types of crystallites have been described: a primary crystallite in the virgin powder state pictured as a platelet or flat needle‐like lamellar crystallite, and a secondary, fringed micellar crystallite from melt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and Mechanism of the Reduction of Manganese Porphyrins: Reaction at the Periphery of the Porphyrin RingRobert J. Balahura and Richard A. KirbyCite this: Inorg. Chem. 1994, 33, 6, 1021–1025Publication Date (Print):March 1, 1994Publication History Published online1 Ma…
Abstract The photo and thermal reactivity of nitroxyl radicals derived from di‐, (oligo)meric hindered amine light stabilizers (HALS) on iso‐octane, a model compound for polyprophylene, was studied and compared to that of monomeric 2,2,6,6‐tetramethyl‐ piperi‐dine‐N‐oxyl (TEMPO). The exchange‐interaction among >NO…
Abstract 2,3‐Epoxy‐1‐propanol has been introduced into isocyanate‐terminated polyurethane to form glycidyl‐terminated polyurethane resins. A series of glycidyl‐terminated polyurethanes based on hydroxyterminated poly(oxypropylene) (poly(oxypropylene) glycol, PPG), toluene diisocyanate (TDI), and 1,4‐butanediol (BD) wa…
The phase characterisation and morphologies of forms I and II terephthalic acid are presented. The structural nature of the II ↔ I polymorphic phase transition has been explored and form II shown to be more stable at room temperature and pressure. A new mechanism is proposed for the apparent stability of multiply twin…
Abstract An amorphous and a liquid‐crystalline side‐chain polymer containing stable nitroxyl radicals are synthesized, the free radical being located either in a piperidine N ‐oxyl or a 1,3‐oxazolidine N ‐oxyl moiety. These polymers are available by reaction of precursor polymer having a formyl group in every repeatin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis, Structure, and Characterization of Five-Coordinate Aquo(octaethylporphinato)iron(III) PerchlorateBeisong Cheng, Martin K. Safo, Robert D. Orosz, Christopher A. Reed, Peter G. Debrunner, and W. Robert ScheidtCite this: Inorg. Chem. 1994, 33, 7, 1319–1324Publication…
The effects of wet-milling barium ferrite in the presence of cationic or anionic surface active substances have been investigated by X-ray diffraction and Mossbauer spectroscopy measurements. Evidence for superparamagnetic relaxation of fine particles, both in the surfactant assisted ball-milled samples and in samples…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpin-state isomerism in crystalline (trifluoromethanesulfonato)(meso-tetraphenylporphinato)iron(III) [FeIII(TPP)(OSO2CF3)]Jorge A. Gonzalez and Lon J. WilsonCite this: Inorg. Chem. 1994, 33, 7, 1543–1553Publication Date (Print):March 1, 1994Publication History Published onli…
Anisotropic magnetic properties of two grades of 0.27 mm thick 3.25% silicon grain-oriented electrical steels are investigated using Epstein size samples cut at 10/spl deg/ intervals between the direction of rolling and its transverse. The global anisotropic variation of the steel is shown to be directly proportional…