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 ISSUEPREVArticleNEXTSelf-assembly of bilayer membranes in organic solvents by novel amphiphilic compoundsYuichi Ishikawa, Hiroaki Kuwahara, and Toyoki KunitakeCite this: J. Am. Chem. Soc. 1989, 111, 22, 8530–8531Publication Date (Print):October 1, 1989Publication History Published online1 May 2…
Abstract XPS and contact angle measurement have been used to study oxygen–plasma‐treated polypropylene (PP) surfaces aged at variable temperatures. Surface rearrangement leading to low wettabillity has been observed, without alteration of the surface composition, as determined by XPS. Experimental results have been in…
Abstract The lattice parameters of a series of hydrogenated polybutadiene (HPB) model copolymers is measured as a function of branch content between 0 and 73 ethyl branches per 1000 C atoms. Expansion of the a and b axes nearly ceases for branch contents greater than 20 per 1000 C atoms. The c axis is seen to contract…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBound water in collagen: evidence from Fourier transform infrared and Fourier transform infrared photoacoustic spectroscopic studyV. Renugopalakrishnan, G. Chandrakasan, S. Moore, T. B. Hutson, C. V. Berney, and Rajendra S. BhatnagarCite this: Macromolecules 1989, 22, 10, 41…
Electrical properties of BaTiO 3 ‐based capacitors are investigated. A new model is developed to explain the frequency response of the impedance of grain‐boundary barrier layer (GBBL) capacitors. This model takes into consideration the dipole polarization effect and provides a simple and effective approach to evaluate…
Researchers have suggested that the increased longitudinal relaxation rates (1/T1) of solvent water protons often found in melanoma result either from the paramagnetism of stable free radicals occurring in melanin or from that of methemoglobin in nonacute hemorrhagic regions of the tumor. However, field-cycling relaxo…
The electrochemical properties of Cu‐tetra(pyrazino [2,3])‐[b,g,l,q]‐5,10,15,20‐tetraazaporphyrine, 4 , and Cu‐tetra(5,6‐dicyanopyrazino [2,3]) [b,g,l,q]‐5,10,15,20‐tetraazaporphyrine, 5 , as thin films in contact with an aqueous acid electrolyte were investigated by cyclic voltammetry. The electrodes show stable elec…
The effect of Fe and B 4 C on the sintering behavior and mechanical properties of TiB 2 ceramics have been studied. Sintering was performed in an Ar atmosphere at 2000° using attrition‐milled TiB 2 powder (mean particle size = 0.8 μm). When a small amount of Fe (0.5 wt%) was added, abnormal grain growth occurred and t…
Abstract Synthesis of novel triblock, polycaprolactone‐b‐polydimethylsiloxane (PDMS) and poly(2‐ethyl‐oxazoline)‐b‐PDMS copolymers were demonstrated. These materials were obtained via the ring‐opening polymerization of ϵ‐caprolactone or 2‐ethyl‐2‐oxazoline monomers by using organofunctionally terminated PDMS oligomers…
β‐Spodumene glass‐ceramic compositions were melted and studied. Compositional variations were made in the three major components as well as through minor additions of other oxides. Sintering characteristics and microstructures were studied and values for crystallization temperature, melting temperature, and crystalliz…
Abstract Today, material science is directed towards the development of multifunctional and oriented structures. One example of such supramolecular systems are liquid crystalline (LC) elastomers which combine the properties of LC phases (the combination order and mobility) with rubber elasticity, one of the most typic…
This paper explains how the convergent beam electron diffraction (CBED) and large angle convergent beam (LACBED) techniques can be used to study crystal defects, bicrystals, and multilayers. It is shown how the LACBED technique in particular can be used to derive the magnitude and sign of the Burgers vectors of disloc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-pressure NMR kinetics. Part 41. Dissociative substitution in four-coordinate planar platinum(II) complexes as evidenced by variable-pressure high-resolution proton NMR magnetization transfer experimentsUrban Frey, Lothar Helm, Andre E. Merbach, and Raffaello RomeoCite t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe life and times of [Ru(bpy)3]2+: localized orbitals and other strange occurrencesM. Keith De Armond and Michael L. MyrickCite this: Acc. Chem. Res. 1989, 22, 10, 364–370Publication Date (Print):October 1, 1989Publication History Published online1 May 2002Published inissue…
A neutron-scattering measurement was performed on pure amorphous Si. The radial distribution function was derived from the wide momentum-transfer range spectra. These data are compared to theoretical models in the 0--10-A\r{} real-space interval.
A new method is proposed for the determination of anharmonic interatomic potentials of fcc metals (Cu, Pd, Ag and Au) and metal halides (AgBr and CuBr). Structural parameters given by the temperature-dependent EXAFS (extended X-ray absorption fine structure) analysis allow us to estimate an interatomic potential if a…
Interfacial shear strength and interfacial sliding friction stress were assessed in unidirectional SiC‐filament‐reinforced reaction‐bonded silicon nitride (RBSN) and borosilicate glass composites and 0/90 cross‐ply reinforced borosilicate glass composite using a fiber pushout test technique. The interface debonding lo…
The steady-state catalytic oxidation process of carbon monoxide on platinum metal surfaces is studied using two irreversible kinetic computer simulation models: (a) An extended version of the model introduced by Ziff, Gulari, and Barshad (ZGB) with the effects of CO desorption and diffusion as well as finite reaction…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermotropic liquid crystals of polyesters having a mesogenic p,p'-bibenzoate unit. 2. X-ray study on smectic mesophase structures of BB-5 and BB-6Junji Watanabe and Manabu HayashiCite this: Macromolecules 1989, 22, 10, 4083–4088Publication Date (Print):October 1, 1989Public…
We present a novel method of preparing highly efficient and stable second-order nonlinear optical (NLO) polymers via chemical cross-linking induced vitrification under electric field. In this method a soluble prepolymer is first prepared that contains cross-linking sites attached to the NLO-active groups. Upon prepari…