Materials Literature
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A design concept of shape memory TiNi fiber reinforced/Al metal matrix composite (SM-MMC) was proposed. Mechanical tensile properties such as stiffness and yield strength, were improved by the strengthening mechanisms: back stress in the Al matrix induced by stiffness of TiNi fibers and the compressive stress in the m…
The effects of long exposure of epoxy resin surfaces to partial discharges under AC field stress were examined. The use of electrical pulse measuring techniques in conjunction with light emission measurements using a photomultiplier tube, which allowed simultaneous detection of both spark and glow discharges, permitte…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron donor-acceptor complexes as potential high-efficiency second-order nonlinear optical materials. A computational investigationSanto Di Bella, Ignazio L. Fragala, Mark A. Ratner, and Tobin J. MarksCite this: J. Am. Chem. Soc. 1993, 115, 2, 682–686Publication Date (Pri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of scandium oxide (ScO+), titanium oxide (TiO+) and vanadyl (VO+) with deuterium: M+-OH bond energies and effects of spin conservationD. E. Clemmer, N. Aristov, and P. B. ArmentroutCite this: J. Phys. Chem. 1993, 97, 3, 544–552Publication Date (Print):January 1, 19…
Dynamic light scattering is applied to the glass phase of nonaqueous suspensions of sterically stabilized colloidal spheres. The short-ranged steric repulsion ensures that the particle interactions are close to hard sphere. This is supported by the observation that the equilibrium phase behavior of these suspensions a…
The chemisorption of hydrogen on two ceria samples (CeO2-BS, 4 m2 g–1; CeO2-SM, 56 m2 g–1) reduced at temperatures ranging from 623 to 1173 K has been studied by Fourier-transform infrared (FTIR) spectroscopy and temperature-programmed desorption followed by thermal conductivity (TPD-TC) and mass spectrometry (TPD-MS)…
The dynamics of the transition from supercooled liquid to glass is examined in terms of several probes: ergodic measures, self-diffusion coefficients, the Van Hove self-correlation functions, and the shear viscosity. Constant-pressure molecular-dynamics calculations at several temperatures are performed for a Lennard-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleColloid deposition rates on silica bed media and artifacts related to collector surface preparation methodsGary M. Litton and Terese M. OlsonCite this: Environ. Sci. Technol. 1993, 27, 1, 185–193Publication Date (Print):January 1, 1993Publication History Published online1 May 20…
Starting about a decade ago, researchers began to explore the use of LC networks as a means of coupling mechanical forces to the mesomorphic character of networks. In so doing, the field of LC elastomers was created and the resulting ferroelectric and piezoelectric materials are beginning to revolutionize the field of…
J. Georges, Analyst, 1993, 118, 1481 DOI: 10.1039/AN9931801481
A stress analysis was carried out in order to determine the local stress distribution around spherical particles in particulate filled composites. The results were introduced into the criteria for micromechanical deformations and the conditions for the initiation of each mechanism were calculated. Results of the calcu…
A 1 : 1 mixture of 5-hexadecyl-2,4,6-triaminopyrimidine and 5,5-didodecylbarbituric acid can cause physical gelation in organic liquids; the gel phenomenon is investigated by FTIR spectroscopy, TEM (transmission electron microscopy) and X-ray diffraction.
Extremely thin graphite filaments with a tubular structure were grown in carbon deposits formed on the negative electrode during generation of fullerenes by dc carbon-arc-discharge evaporation. The filaments and small graphite particles coexist in the central portion of the deposits. Three kinds of morphologies of car…
X-ray photoelectron spectroscopy (XPS) has been used to study the chemical effects of both inert (argon) and reactive (oxygen, nitrogen, and mixed gas) plasma treatments done in situ on a variety of polymer surfaces. Inert gas plasma treatments introduce no new detectable chemical species onto the polymer surface but…
Partial compressibilities of globular proteins in water are reviewed. Contribution of hydrational and of intrinsic compressibilities to experimental partial quantity have been evaluated from ultrasonic data using two independent methods: (a) additive calculation of the hydrational contributions of the surface atomic g…
It is shown experimentally that the complete replacement of benzene rings with thiophene rings in a donor–acceptor substituted stilbene significantly enhances its second-order nonlinear optical hyperpolarizability (β); results obtained with a series of thiophene-substituted donor–acceptor compounds with different conj…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDendritic analogs of engineering plastics: A general one-step synthesis of dendritic polyaryl ethersTimothy M. Miller, Thomas X. Neenan, Elizabeth W. Kwock, and Susan M. SteinCite this: J. Am. Chem. Soc. 1993, 115, 1, 356–357Publication Date (Print):January 1, 1993Publicatio…
The taper-shaped monoesters of mono-3a, di-3c, tri-3d, and tetra-3f ethylene glycol with 3,4,5-tris(p-dodecyloxybenzyloxy)benzoic acid 1 and their corresponding polymethacrylates, 6a, b, c and d, respectively, self-assemble into a tubular supramolecular architecture displaying an enantiotropic columnar hexagonal (Φh)…
ABSTRACT Edible films from corn zein, wheat gluten, and wheat gluten/soy protein isolate (2.1:0.9) were produced and their oxygen permeabilities were determined at 7, 15, 25, and 35°C under 0% relative humidity. Mean oxygen permeability values for the 3 films were in the range of 1.8–11.2, 0.9–6.1, and 0.6–3.8 amol/m.…
A history of polymeric insulators is given, beginning in the 1940s when organic insulating materials were used to manufacture high-voltage indoor electrical insulators from epoxy resins. Their advantages and early experiences with them are given. A bibliography covering mainly 1970 to the present is given.>