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Abstract A stable 8.4 Å hydrate of kaolinite was prepared by exchanging ethylene glycol for water in the 10.8 Å intercalate of ethylene glycol in kaolinite. The hydrate of kaolinite was characterized by XRD, FTIR and TGA/DSC. From the TGA data, one can estimate that there is 0.60 water molecule per Al 2 Si 2 O 5 (OH)…
Mechanisms of the deposition of carbon thin films by the laser ablation of graphite were investigated by monitoring the plasma emission. Parameters such as electron density, ionization temperature, and vibrational temperature during plasma growth were evaluated as a function of the laser power density and the surround…
Many features of the structural, magnetochemical, spectral, electrochemical, and chemical behavior of transition metal complexes with redox-active dioxolene ligands indicate that most of them are valence-localized species with well defined and experimentally distinguishable metal- and dioxolene-oxidation states. The v…
Compositional dependence of spontaneous emission probabilities of Er 3+ was studied for silicate, borate, and phosphate glasses using the Judd–Ofelt theory. Through all of the glass systems, spontaneous emission probabilities of the 4 I 13/2 → 4 I 15/29 → 4 I 9/2 → 4 I J , and 4 S 3/2 → 4 I J ( J = 9/2, 11/2,13/2,15/2…
Abstract Impact modification was studied for a variety of engineering thermoplastics to determine if notched Izod data obtained at various temperatures and modifier concentrations could be correlated with particle size or surface‐to‐surface interparticle distance of the modifier. Elastomers evaluated were characterist…
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}}…