Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCocrystallization and phase segregation of polyethylene blends. 1. Thermal and vibrational spectroscopic study by utilizing the deuteration techniqueKohji Tashiro, Richard S. Stein, and Shaw L. HsuCite this: Macromolecules 1992, 25, 6, 1801–1808Publication Date (Print):March…
Experimental studies conducted in conjunction with a numerical analysis of strain‐rate gradients have established the origin of the damage process that occurs upon the densification of powders containing nonsintering inclusions and reinforcements. The underlying phenomenon is the development of localized compressive s…
Abstract 13 C-NMR MAS solid-state spectroscopy and 1 H-NMR relaxation measurements have been applied for quantitative determination of crosslink density in sulfur-accelerated NR vulcanizates. It is shown that the 13 C-NMR method is able to distinguish between monosulfidic crosslinks and polysulfldic structures; theref…
Macromolecules
The order-to-disorder transition in a nearly symmetric diblock copolymer of polystyrene/poly(cis-1,4)isoprene (Mw = 15 700) was reproducibly observed in heating and cooling runs using small-angle scattering and rheological measurements. Small-angle x-ray scattering characterizes the ordered structure as consisting of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-temperature crystallization and morphology of poly(aryl ether ether ketone)Andrew J. Lovinger, Steven D. Hudson, and Don D. DavisCite this: Macromolecules 1992, 25, 6, 1752–1758Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFactors affecting photoinduced alignment regulation of cyclohexanecarboxylate-type nematic liquid crystals by azobenzene molecular filmsKoso Aoki, Takahiro Seki, Yasuzo Suzuki, Takashi Tamaki, Akira Hosoki, and Kunihiro IchimuraCite this: Langmuir 1992, 8, 3, 1007–1013Public…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation of group 15 (phosphorus, antimony, and bismuth) complexes of meso-tetra-p-tolylporphyrin (TTP) and x-ray crystal structure of [Sb(TTP)(OCH(CH3)2)2]ClTanya Barbour, Warwick J. Belcher, Penelope J. Brothers, Clifton E. F. Rickard, and David C. WareCite this: Inorg.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrophase separation of charged diblock copolymers: melts and solutionsJ. F. Marko and Y. RabinCite this: Macromolecules 1992, 25, 5, 1503–1509Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pubs.acs.…
We present Monte Carlo simulations of the extinction rate of dense media with randomly distributed dielectric spheres that occupy up to 25% by volume and size parameter ka = 0.2. Maxwell’s equations in multiple-scattering form are solved iteratively for each realization. Convergence is demonstrated numerically by vary…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdering of copolymer thin films as revealed by atomic force microscopyB. Collin, D. Chatenay, G. Coulon, D. Ausserre, and Y. GallotCite this: Macromolecules 1992, 25, 5, 1621–1622Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT"Hardness profile" of a reaction pathDipankar DattaCite this: J. Phys. Chem. 1992, 96, 6, 2409–2410Publication Date (Print):March 1, 1992Publication History Published online1 May 2002Published inissue 1 March 1992https://pubs.acs.org/doi/10.1021/j100185a005https://doi.org/10…
Model surface studies of magnesium oxide have been carried out using surface sensitive techniques. Ultrathin MgO films have been synthesized under ultrahigh vacuum (UHV) conditions by thermally evaporating Mg onto Mo(100) in the presence of oxygen. Low-energy electron diffraction (LEED) studies indicate that the MgO f…
The various applications of high‐performance polymers , for example in hollow‐fiber membranes (see figure) or as gears in chemical pumps, require materials with widely differing properties. An overview of the different classes of high‐performance polymers available, including polyetherketones, polysulfones, and polyam…
The luminescence properties of 3 μm thick, strongly emitting, and highly porous silicon films were studied using a combination of photoluminescence, transmission electron microscopy, and Fourier transform infrared spectroscopy. Transmission electron micrographs indicate that these samples have structures of predominan…
A boundary element method (BEM) in terms of magnetic vector potential and electric scalar potential is successfully applied to three-dimensional, multiply connected, and open boundary problems caused by the heavy current of leads in a three-phase combination transformer. The quasi-frontal method is employed for the so…
X-ray photoelectron spectroscopy measurements of the principal core levels of high purity strontium carbonate are presented.
The effect of liquid animal manure on heavy metal solubilization in soil has been studied in the laboratory; three different types of experiments were carried out: 1) aerobic and anaerobic incubation of soil/manure mixtures 2) desorption of heavy metals from soil, as affected by manure liquid fraction 3) gel permeatio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew layered ternary niobium tellurides: synthesis, structure, and properties of niobium metal telluride, NbMTe2 (M = iron, cobalt)Jing Li, Michael E. Badding, and F. J. DiSalvoCite this: Inorg. Chem. 1992, 31, 6, 1050–1054Publication Date (Print):March 1, 1992Publication His…
Escherichia coli kgtP which maps at 56.5 min codes for alpha-ketoglutarate permease (KgtP). This protein, expressed from the cloned gene using the T7 polymerase system and [35S]methionine labeling, fractionated with cell membranes. Right-side-out (RSO) membrane vesicles prepared from a kgtP negative mutant strain did…