Materials Literature
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Abstract Phase phenomena in mixtures containing any combination of aliphatic and aromatic polyamides can be formulated by the application of a mean‐field binary interaction model. This has been achieved by the quantitative analysis of the solubility of an aromatic polyamide, denoted as nylon 3Me6T, in a homologous ser…
Scanning acoustic microscopy (SAM) has allowed observation of the microscopic details of the attack by cathodic alkaline corrosion products on a model organic coating on steel. Attack of the polymer by the alkaline corrosion products occurs at numerous localized regions resulting in mechanical degradation of the coati…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTemperature dependence of copper(II) migration and formation of new copper(II) species during catalytic propylene oxidation on copper(II)-exchanged Y zeolite and comparison with X zeoliteJong Sung. Yu and Larry. KevanCite this: J. Phys. Chem. 1990, 94, 19, 7612–7620Publicati…
Abstract The objective of this work was to investigate the compatibilization of a blend of linear low density polyethylene with polypropylene by Injection of a free radical initiator during extrusion. The reactive extrusion process utilized a single screw extruder equipped with two static mixers. The initiator was inj…
Abstract Poisson's ratio has been measured in a series of filled elastomers using a novel optoelectronic system. Relative precision of this measurement was found to be approximately 0.7% at 1% strain for this family of materials. The largest contributing error source was determined to be the tolerances that could be o…
The spins of unpaired electrons in binuclear CrIII complexes containing the structural element A are coupled antiferromagnetically. Measurement of the temperature-dependent susceptibilities showed that the contribution of this coupling is inversely proportional to the twelfth power of the intramolecular distance betwe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStepwise hydrolysis kinetics of tetrachloroplatinate(II) in baseLi Wu, Brigitte E. Schwederski, and Dale W. MargerumCite this: Inorg. Chem. 1990, 29, 18, 3578–3584Publication Date (Print):September 1, 1990Publication History Published online1 May 2002Published inissue 1 Sept…
Quasielastic light-scattering measurements are performed on a suspension of spherical particles possessing an intrinsic optical anisotropy. From the correlation function of the depolarized scattered intensity, we derive both the translational and rotational self-diffusion coefficient as functions of the volume fractio…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNuclear magnetic resonance studies of the formation of tertiary alkyl complexes of iron(III) porphyrins and their reactions with dioxygenAlan L. Balch, Rebecca L. Hart, Lechoslaw Latos-Grazynski, and Teddy G. TraylorCite this: J. Am. Chem. Soc. 1990, 112, 20, 7382–7388Public…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLimonoid glucosides in orange juices by HPLCZareb Herman, Chi H. Fong, Peter Ou, and Shin HasegawaCite this: J. Agric. Food Chem. 1990, 38, 9, 1860–1861Publication Date (Print):September 1, 1990Publication History Published online1 May 2002Published inissue 1 September 1990h…
Unlike constant moisture effects on the behavior of composite materials, transient moisture effects are not well studied and known. Armstrong and Kingston have shown that the creep of wood under transient humidity levels could be greatly accelerated over that at any constant moisture content. Later this phenomenon was…
Detailed stratigraphic and taxonomic analyses were made of small Stephanodiscus and Cyclostephanos species in the recent sediments of a small eutrophic lake (Lough Augher, Co. Tyrone, N. Ireland). The morphological variety present was assessed by LM and SEM studies of sediment depths with high valve concentrations. Th…
Dip‐coated sol–gel‐derived TiO 2 films on an alumina substrate were converted to nonstoichiometric titanium nitride (TiN x ( x ≦ 1)) films by heating at approxmately 1000°C in NH 3 gas. TiO 2 films made from TiO 2 sols prepared from Ti(O– i ‐C 3 H 7 ) 4 and stabilized by diethanolamine were more easily nitrided than t…
Abstract The structure of Silica Springs allophane from New Zealand has been studied by high-resolution 27 A1 and 29 Si NMR spectroscopy, IR spectroscopy and electron microscopy. Experimental NMR conditions were chosen to give a quantitative relationship between signal strength and Al content. Aluminium is present in…
Economic, safety and environmental prospects of fusion reactors, Conn, R.W., Holdren, J.P., Sharafat, S., Steiner, D., Ehst, D.A., Hogan, W.J., Krakowski, R.A., Miller, R.L., Najmabadi, F., Schultz, K.R.
The $^{35}\mathrm{Cl}$ nuclear quadrupole resonance spectrum of a single crystal of sodium chlorate [R. Tycko, Phys. Rev. Lett. 58, 2281 (1987)] rotating about two axes reflects a non-Abelian gauge potential. This gauge potential is an example of Wilczek and Zee's [Phys. Rev. Lett. 52, 2111 (1984)] generalization of B…
Abstract Scanning electron microscopy (SEM) was used to study the mechanism of falling‐strand devolatilization of polymer melts. Polystyrene and low‐density polyethylene were enriched with styrene and hexane, respectively, and were subsequently extruded as thin strands at various conditions. The polymer strands were e…
Resistivity and Seebeck coefficients are reported in the range 50 KT300 K for zinc ferrite single crystals ${\mathrm{Fe}}_{3\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Zn}}_{\mathit{x}}$${\mathrm{O}}_{4}$ in the composition range 0\ensuremath{\le}x0.3. Samples with 0x\ensuremath{\lesssim}0.012 exhibited first-order p…
Abstract Novel acrylic monomers bearing a monosaccharide residue were synthesized in reactions of some methyl glycosides with 2-hydroxylethyl acrylate or methacrylate in the presence of heteropoly acid. All of them were highly soluble in water and readily polymerized by radical initiators.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of the new highest Tc ambient-pressure organic superconductor, .kappa.-(BEDT-TTF)2Cu[N(CN)2]Br, by five different routesHau H. Wang, Aravinda M. Kini, Lawrence K. Montgomery, Urs Geiser, K. Douglas Carlson, Jack M. Williams, James E. Thompson, Diana M. Watkins, W.…