Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA novel synthesis of triple-deckered triporphyrinIsmail Abdalmuhdi and C. K. ChangCite this: J. Org. Chem. 1985, 50, 3, 411–413Publication Date (Print):February 1, 1985Publication History Published online1 May 2002Published inissue 1 February 1985https://pubs.acs.org/doi/10.…
Single crystals cycled over a wide range of strains, below and up to those of the plateau in the cyclic stress-strain curve, have been prepared by ultrasonic fatigue. The dislocation structures of these specimens have been examined by transmission electron microscopy (TEM) and details of the structures, including the…
Abstract The interaction of copolymer latex particles with emulsifiers is governed to a great extent by the monomer composition of the particle surface. In this article it is demonstrated that for methylmethacrylate butylacrylate copolymer latexes this quantity, within certain limits, may be determined by XPS (ESCA) b…
Adopting a language common to both physicists and chemists, we discuss the origin of formation of radical-ions (polarons) and diions (bipolarons) upon doping of conjugated polymers with a nondegenerate ground state. We present a review of some of the calculations we have devoted to the influence of doping on the geome…
Relative lateral electron surface dose distributions from filters and air in high energy photon beams were determined using the Fermi-Eyges theory of multiple scattering. The model includes transmission and angular scattering in materials and in air. Backscatter from the phantom was also estimated. The variation of su…
Abstract Exchange‐rate probability‐density functions (pdf) have been calculated for lysozyme hydrogen‐exchange data by numerical Laplace inversion over the temperature range 5–45°C. The smoothest numerical solutions show three broad overlapping peaks. Analysis of the temperature dependence of the cumulative exchange‐r…
Abstract Feldspars in granitic saprolite in southwestern Australia have altered to halloysite, kaolinite, and gibbsite with no evidence of noncrystalline material. The secondary minerals are commonly present as intimate mixtures within altered feldspar grains, but discrete zones of gibbsite or halloysite-kaolinite als…
A two‐dimensional model for the coupled effects of heat transfer and capillarity in a liquid encapsulated Czochralski growth system is analyzed by solving the full free‐boundary problem describing the temperature field in each phase, the shapes of the melt/solid and fluid/fluid interfaces, and the radius of a steadily…
Highly conducting poly(p-phenylene vinylene), PPV, has been obtained via pyrolysis of the soluble precursor polymer derived from p-xylylene bis(diethyl sulfonium bromide) which is processed to film. The highly oriented PPV film is obtained by stretching the precursor film up to ten fold at a higher temperature. The fi…
A number of laterally fluorinated 4,4″-di-n-alkyl-, 4,4″-di-n-alkoxy- and 4-n-alkyl-4″-n-alkoxy-l,r:4′,1″-terphenyls of structure (I) have been synthesised, with the lateral fluoro-substituent in the central benzene ring. The nematic and smectic thermal stabilities for all three series of compounds, have been examined…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCatalysis of the electroreduction of dioxygen and hydrogen peroxide by an anthracene-linked dimeric cobalt porphyrinHsue Yang Liu, I. Abdalmuhdi, C. K. Chang, and Fred C. AnsonCite this: J. Phys. Chem. 1985, 89, 4, 665–670Publication Date (Print):February 1, 1985Publication…
Room temperature, 700-, 1000-, 1200-, and 1370-C examinations of the effect of 1.7-2.6 mol pct rare earth oxide additions to sintered Si3N4 are conducted. While the room temperature-1000 C bend strengths were higher for this material with Y2O3 additions than with CeO2, La2O3, or Sm2O3, the reverse was true at 1200-137…
Enthalpies of segregation for isovalent impurities in magnesium and calcium oxide as a function of surface concentration were calculated by using an atomistic computer simulation method. We have considered Be 2+ , Mg 2+ , Ca 2+ , Ba 2+ , and Ni 2+ , segregating to both (001) and (110) faces. The results obtained can b…
Two series of mesogenic compounds consisting of a rigid pyramidal central core and six equal flexible side chains were synthesized and their mesomorphic properties studied by calorimetry and optical microscopy. The two series of compounds are: I-hexaalkyloxytribenzocyclononene and II-hexaalkanoyloxytribenzocyclononene…
Abstract The chain entanglement states in high density, linear low density, and low density polyethylenes (HDPE, LLDPE, and LDPE) have been modified by recovering the polymers from solutions in trichlorobenzene (TCB) and p ‐xylene. In the thermodynamically good solvent, TCB, the entanglement density is assumed to be s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpontaneous and rapid polymerization of plasma-exposed monomer crystals in liquid phaseYoshihito Osada and Akira MizumotoCite this: Macromolecules 1985, 18, 2, 302–304Publication Date (Print):February 1, 1985Publication History Published online1 May 2002Published inissue 1 F…
The crystallographic groups play an important role in solid state physics, where their representations are of particular interest. In this paper we classify the kernels of all possible representations by deriving necessary and sufficient conditions for a subgroup H of a crystallographic group G to be invariant. The st…
Abstract [NiL3]Cl2·H2O, [NiL2(H2O)2]Br2, and [NiL2(NCS)2] (L=1,4-butanediamine) have been synthesized and their thermal investigations have been carried out. [Ni2L3Cl4], [NiLCl2], [Ni4L3Br8], and [NiL(NCS)2] have been synthesized pyrolytically in solid phase by temperature arrest technique from their corresponding par…
Optical excitation and emission spectra are reported for the Cs2NaErCl6 system under variable-temperature (8.5–298 K) conditions. Detailed line assignments are made for the 4I15/2←4S3/2 and 4I15/2←4F9/2 high-resolution emission spectra, and all five crystal-field levels split out of the 4I15/2 ground multiplet are loc…
An elastic viscoplastic constitutive equation for steels at high temperature is calibrated on a set of torsion tests performed by IRSID for different temperatures, strain rates and steel qualities. The integration of this equation in a computer code is examined and results for strip hot‐rolling are given.