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。
The materials requirements for nonlinear-optical applications, including electro-optics, second-harmonic generation, and all-optical signal processing, are discussed. The status of organic materials is reviewed in light of these requirements, along with the needs for future research.
Synthese des homo- et copolymeres par voie cationique. Mise en evidence de deux transitions vitreuses dans les copolymeres
An interpretation of current‐time transients describing anodic oxide film growth on metals is presented. When the rate of oxide film growth is controlled by ion conduction under high electric field, the classical theory of Cabrera and Mott leads to shallow curvature in plots of vs. . Such data can be linearized by usi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyoxoanions derived from tungstosilicate, A-.beta.-SiW9O3410-: synthesis and crystallographic and tungsten-183 NMR characterization of Si2W18Zr3O71H311-, including its organic solvent soluble Bu4N+ saltRichard G. Finke, Brian Rapko, and T. J. R. WeakleyCite this: Inorg. Ch…
Localized corrosion of stainless steels (SSs) has often occurred in newsprint paper machines, despite the low chloride concentration in the process water. This is now known to be caused by thiosulfateions, which can cause pitting of AISI 304 steel without assistance from chloride if the sulfate-to-thiosulfate ratio is…
The humidity‐sensitive characteristics of La 3+ ‐doped and undoped specimens were investigated at 400°C as a function of water vapor pressures. The conductivities of the specimens increased about one order of magnitude over the entire water vapor pressure range by the partial substitution of La 3+ ions for Sr 2+ in ,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotomodulation of polypeptide conformation by sunlight in spiropyran-containing poly(L-glutamic acid)F. Ciardelli, D. Fabbri, O. Pieroni, and A. FissiCite this: J. Am. Chem. Soc. 1989, 111, 9, 3470–3472Publication Date (Print):April 1, 1989Publication History Published onli…
Surfaces of commercial polyurethanes (PUs) were modified by poly(ethylene oxide) (PEO) grafting and/or heparin immobilization for long-term biomedical applications. PU surfaces were treated with diisocyanate and then reacted with PEO or heparin. The heparin immobilized by various methods on the PU surface was very sta…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereoregularity in synthetic β-hydroxybutyrate and β-hydroxyvalerate homopolyestersSteven Bloembergen, David A. Holden, Terry L. Bluhm, Gordon K. Hamer, and Robert H. MarchessaultCite this: Macromolecules 1989, 22, 4, 1656–1663Publication Date (Print):April 1, 1989Publicati…
Gadolinium diethylenetriaminepentaacetic acid (DTPA) has not proved particularly useful for hepatosplenic magnetic resonance imaging. However, by entrapping the Gd-DTPA within lipid vesicles, one may exploit the ability of the reticuloendothelial system to endocytose particulates, permitting passive delivery of contra…
Abstract Organic conjugated polymers and oligomers constitute a three‐dimensional network of molecular wires, in which all monomeric units can be functionalized with various prosthetic groups. By varying the nature of these groups, specific interactions with external physical or chemical phenomena can be developed in…
Mechanical properties of polypropylene (PP) filled with wood flour was studied. To improve adhesion at the interface, different surface treatments of the fiber were carried out. Polymethylene polyphenylisocyanate (PMPPIC) and silane coupling agents (silane A-172, A-174, and A-1100) were used to pretreat the fiber befo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRegioselective oxidation catalysis in synthetic phospholipid vesicles. Membrane-spanning steroidal metalloporphyrinsJohn T. Groves and Ronny NeumannCite this: J. Am. Chem. Soc. 1989, 111, 8, 2900–2909Publication Date (Print):April 1, 1989Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA study of the linear viscoelastic properties of cyclic polystyrenes using creep and recovery measurementsG. B. McKenna, B. J. Hostetter, N. Hadjichristidis, L. J. Fetters, and D. J. PlazekCite this: Macromolecules 1989, 22, 4, 1834–1852Publication Date (Print):April 1, 1989…
A survey is given of the present state of understanding of leader breakdown of electronegative gases in nonuniform field gaps and under fast-rising voltage waveforms. The basic physical processes involved are the formation of a pulsed streamer corona, the transformation of one of the streamers into a leader step, the…
Abstract The molecular process whereby light induces color changes in certain substances, namely photochromism, is currently a topic of active research. Many reactions—mainly monomolecular—have been reexamined in greater detail from the standpoint of photochromism. Those found to be especially suitable for such studie…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrostructure of bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxyvalerate)Naoko Kamiya, Yasuhiko Yamamoto, Yoshio Inoue, Riichiro Chujo, and Yoshiharu DoiCite this: Macromolecules 1989, 22, 4, 1676–1682Publication Date (Print):April 1, 1989Publication History Pub…
Abstract Wood cellulose, a versatile and renewable natural resource, has potential for use as a reinforcement for synthetic organic polymers. During the past 80 years a number of materials using the reinforcing properties of wood cellulose have found major markets. Forms of wood cellulose proposed as reinforcements in…
Ergodic behavior in liquids, supercooled liquids, and glasses is examined with a focus on the time scale needed to obtain ergodicity. A measure, d(t), which is based on the time-averaged energies of the individual particles and which is referred to as the ``energy metric,'' is introduced to probe the approach to ergod…
The reaction products formed in a series of fully “equilibrated,” roomtemperature‐hydrated, fumed colloidal silica plus lime water mixtures were examined using 29 Si magic angle spinning nuclear magnetic resonance. The data suggest that two structurally distinct calcium silicate hydrate (C‐S‐H) phases exist in the sys…