Materials Literature
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Procedures were developed to produce edible wheat, gluten-based films. A film was produced as a standard. Five additional films were then produced by modifying the initial film-forming solution. Modifications included changing the plasticizer, partially substituting wheat gluten with soy protein isolate and corn zein,…
The crystal habit of barium sulfate formed by the rapid mixing of Ba2+ and SO2–4 containing brines at 95 °C has been investigated and the effects of coprecipitated K+, Mg2+, Ca2+ and Sr2+ ions, supersaturation ratio and barium-to-sulfate mixing ratio on the crystal morphology studied. The most marked crystal morpholog…
Abstract Films of polystyrene–polybutadiene–polystyrene (PS/PB/PS) triblock copolymer and polystyrene‐poly(ethylene/propylene) (PS/PEP) diblock copolymer were cast from toluene solutions subjected to hydrodynamic flow at room temperature using a device based on a novel casting method we term ‘roll‐casting.’ Polymer so…
Solid-state 27Al and 25Mg MAS NMR and X-ray powder diffraction in combination with thermal analysis indicates that synthetic hydrotalcite decomposes thermally in at least three weight-loss steps. The first step, at 250–280 °C, principally involves the loss of the interlayer water, but the appearance of some tetrahedra…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrogen oxide (NO) reduction by activated carbons. 1. The role of carbon porosity and surface areaM. J. Illan-Gomez, A. Linares-Solano, C. Salinas-Martinez de Lecea, and J. M. CaloCite this: Energy Fuels 1993, 7, 1, 146–154Publication Date (Print):January 1, 1993Publication…
Abstract Structures of semi crystalline high‐molecular weight polyethylene and their changes with temperature were studied by analysis of Raman spectra. Decomposition of spectra into contributions of an orthorhombic crystalline phase, a meltlike phase, and two kinds of transition regions yields the respective mass fra…
New heteropolyperoxometalates of the type R3[XO4{MO(O2)2}4][R = N(C6H13)4+, N(PPh3)2+ or ⅓[Co(en)3]3+(en = ethane-1,2-diamine); X = P or As; M = Mo or W] have been characterized by IR, Raman and where appropriate 31P NMR spectroscopy. Epoxidation of cyclic and linear alkenes by these species with H2O2 as co-oxidant ha…
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…