Materials Literature
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Hydrogen embrittlement (HE) of two high-strength, low-alloy steels was studied in conditions typical of the marine environment. Double-cantilever beam specimens, heat-treated to produce the microstructure in the heat-affected zone of a weld, were tested in seawater containing sulfate-reducing bacteria (SRB) at a range…
The first part of this paper discusses the molecular design of selected examples of structural units containing taper-shaped exo-receptors and various crown ether, oligooxyethylenic, and H-bonding-based endo-receptors, which self-assemble into cylindrical channel-like architectures via principles resembling those of t…
The high intensity of an X-ray synchrotron source in combination with a curved position-sensitive detector covering 120° (CPS120 by INEL) has been used to collect complete powder diffraction patterns, suitable for Rietveld analyses, within minutes. From consecutive patterns (ΔT ≃ 5 K), detailed information was obtaine…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of the Swelling and Drying Kinetics of Thin Gelatin Gel Films by in situ InterferometryChi Wu and Chui-Ying YanCite this: Macromolecules 1994, 27, 16, 4516–4520Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 Au…
Abstract The reaction of potassium calcium tris(dithiooxalato)chromate(III) hexahydrate KCa[Cr(dto)3]·6H2O, a metal(II) salt and a tetrapropylammonium bromide (NPr4Br) in aqueous methanol forms bimetallic assemblies {NPr4[MCr(dto)3]}x (M = Fe (1), Co (2), Ni (3), Zn (4)), where the dto group bridges Cr(III) and M(II)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA New Polymorphic Modification of Tetrathiafulvalene. Crystal Structure, Lattice Energy and Intermolecular InteractionsArkady Ellern, Joel Bernstein, James Y. Becker, Sharona Zamir, Leah Shahal, and Shmuel CohenCite this: Chem. Mater. 1994, 6, 8, 1378–1385Publication Date (P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolyimides Containing Quinoxaline and Benzimidazole UnitsPaul M. Hergenrother and Stephen J. HavensCite this: Macromolecules 1994, 27, 17, 4659–4664Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August 1994https://pub…
Abstract The solubility of the epsilon polymorph of CL‐20 was determined in thirteen liquids over the temperature range of ambient to 74°C using high performance liquid chromatography. The experiments included ϵ‐CL‐20 produced by two different synthesis routes; one lot contained a higher level of polymorphic impurity,…
The polarization in isotropic radially symmetric lens and mirror systems in the paraxial approximation is examined. Polarized aberrations are variations in the phase, amplitude, and polarization state of the electromagnetic field across the exit pupil. Some are dependent on the incident polarization state and some are…
Laser ablation deposition was used to grow polycrystalline Cu-Ni and Ag-Ni thin films on amorphous substrates at room temperature. X-ray diffraction was employed to determine the phases present and the residual macrostress and to analyze the structural imperfection in terms of crystallite size and microstrain. For con…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolvent Self-Diffusion in Rubbery Polymer-Solvent SystemsJ. S. Vrentas and C. M. VrentasCite this: Macromolecules 1994, 27, 17, 4684–4690Publication Date (Print):August 1, 1994Publication History Published online1 May 2002Published inissue 1 August 1994https://pubs.acs.org/d…
Abstract The pyrolysis of polyvinyl chloride (PVC) was examined with a thermal gravimetric analyzer (TGA). The experiments were carried out over the temperature range of 400‐800 K at three heating rates of 1, 2, and 5.5 K/min and in a nitrogen atmosphere. The results indicate that the entire process of PVC pyrolysis u…
A profound analogy exists between the modulate structures in magnetic materials and in nematic liquid crystals, especially for the behavior in an external field. Starting from this point, we study the influence of an electric field on the spatially modulated spin structure (spin-density-wave state) of the magnetic fer…
Gallium is a metal that literally melts in your hand. It has low toxicity, near-zero vapor pressure, and a viscosity similar to water. Despite possessing a surface tension larger than any other liquid (near room temperature), gallium can form nonspherical ...Read More
Two coercivity models, a phenomenological model developed by Givord et al. and a micromagnetic model developed by Kronm\"uller et al., have been used to analyze the temperature dependence of the coercive field of sintered ${\mathrm{Pr}}_{17}$${\mathrm{Fe}}_{75}$${\mathrm{B}}_{8}$ and ${\mathrm{Pr}}_{17}$${\mathrm{Fe}}…
Porphycene photosensitizers bearing two or four methoxyethyl side chains were synthesized in nine steps from commercially available starting materials. Ether cleavage led to (hydroxyethyl)- and (bromoethyl)porphycenes that were converted to vinyl and benzo derivatives. Five of the side chain-functionalized porphycenes…
The concept of structure sensitivity is well established for reactions catalyzed by metals as it has been generally demonstrated by the use of supported metal catalysts exhibiting different particle size [l-71. The con-cept of structure sensitivity in catalysis by metal oxides is considerably less well developed than…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRhodium(II) Porphyrin Bimetalloradical Complexes: Preparation and Enhanced Reactivity with CH4 and H2Xiao-Xiang Zhang and Bradford B. WaylandCite this: J. Am. Chem. Soc. 1994, 116, 17, 7897–7898Publication Date (Print):August 1, 1994Publication History Published online1 May…
In recent experiments it was found that the Kapitza conductance between diamond and Pb at room temperature is as much as 100 times larger than predicted by the acoustic mismatch model. Because the diamond and Pb are in intimate contact, the phonon modes near the interface are joint vibrational modes, extending a phono…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicrobial Synthesis and Characterization of Poly(3-hydroxybutyrate-co-3-hydroxypropionate)Eihaku Shimamura, Mariastella Scandola, and Yoshiharu DoiCite this: Macromolecules 1994, 27, 16, 4429–4435Publication Date (Print):August 1, 1994Publication History Published online1 Ma…