Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
By analyzing the vibrational eigenmodes of a model structure obtained previously by quantum molecular dynamics, the two sharp features appearing in the Raman spectrum of vitreous silica could conclusively be assigned to three- and four-membered ring structures embedded in the network. The projections of the eigenmodes…
Six steels were obtained from excavations of in-service gas transmission pipelines, and subjected to hydrogen charging by electrochemical means. The aim was to assess the susceptibility to hydrogen damage of these materials, which were not expected to encounter hydrogen-containing environments when they were originall…
The radical polymerization of the three kinds of fluorine-containing maleimides, that is, N-[2-(trifluoromethyl)phenyl]maleimide (2TFPhMI), N-[3-(trifluoromethyl)phenyl]maleimide (3TFPhMI), and N-[4-(trifluoromethyl)phenyl]maleimide (4TFPhMI) was carried out in the presence of a radical initiator in benzene at 60°C. T…
A novel thermotropic side-chain liquid crystalline ionomer (LCI) containing sulfonic acid groups on the side-chain was synthesized by graft copolymerization of mesogenic monomer 4-allyloxy-benzoxy-4′-methoxyphenyl (ABM) and nonemesogenic monomer 4-allyloxy-azobenzene sulfonic acid (AABS) upon polymethylhydrosiloxane (…
Rare earth metal ions containing polymer ternary complexes were synthesized and characterized. The functional polymers investigated were polymer-bond triphenylphosphine (PBDP), polymer-bond triphenylarsine (PBDAs), polymer-bond triphenylstibine (PBDSb), and polymer-bond triphenylbismuthine (PBDBi) as polymer ligands.…
Graft copolymerization of methacrylic acid (MAA) onto starch using a potassium persulfate/sodium thiosulfate redox initiation system was investigated. Emphasis was placed on the promotion of graft formation while minimizing homopolymerization. This could be achieved through a thorough investigation into the major fact…
Microporous polypropylene sheets are prepared by biaxially stretching polypropylene sheets containing CaCO3 filler. Here, the stretching ratio is one of the most important factors in the preparative process, and removing the CaCO3 filler also affects the sheet properties. Their effects were studied in relation to the…
Microporous polypropylene sheets are prepared by biaxially stretching polypropylene sheets containing CaCO3 filler. Here, the stretching ratio is one of the most important factors in the preparative process, and removing the CaCO3 filler also affects the sheet properties. Their effects were studied in relation to the…
Styrene–maleic anhydride (SMA) copolymers containing either 7 or 14% maleic anhydride were filled with either pine flour or dry-process aspen fiber from a medium density fiberboard (MDF) plant. Material properties of the filled and unfilled SMA plastics were compared with those of aspen-fiber-filled and unfilled polys…
Measurements of nonspecular EUV scattering from Mo/Si multilayer coated mirrors have been performed. The surface power spectral density is deduced from the angular scattering distribution and in all cases is found to be in excellent agreement with surface profile measurements, by both optical and atomic force microsco…
Je 32 Carboxylat- und Ammonium-Funktionalitäten ermöglichen die elektrostatische Wechselwirkung zwischen unterschiedlich geladenen dendritischen Elektrolyten und Porphyrinkernen, die in protischen Medien zu einem supramolekularen, fluoreszenzaktiven Aggregat mit vorausbestimmbarer Anordnung zweier kommunizierender Chr…
A new generation of nonionic surfactants that are widely applicable and simultaneously ecologically compatible has been developed in the alkyl polyglycosides. Their production from the renewable resources glucose and fatty alcohol and their ultimate biodegradation into carbon dioxide, water, and assimilated bacterial…
The surprising accessibility of the title compound has enabled the first X-ray structural analysis of the hydrogen peroxocarbonate anion (shown on the right).
Four different poly(ethylene oxide) [PEO] molecules were compared as grafted polymer layers for biomaterials' substrates: two linear polymers and two star polymers. Conditions maximizing surface coverage for each molecule were employed with the aim of inhibiting protein adsorption and increasing the density of end gro…
1-Heptanol flow in irregularly shaped surface grooves in Pd-coated Cu is shown to be an example of Poiseuille flow with simple Washburn kinetics of the form z 2 = C (γ/μ) t, where γ is the liquid surface tension, μ is the viscosity, and C is a function of the groove dimensions and the contact angle θ. A shape independ…
Diffractograms with twelvefold rotational symmetry (depicted on the right) were obtained from the first quasicrystalline chalcogenide Ta1.6Te. This compound was prepared on a preparative scale by the reduction of TaTe2 with tantalum below 1870 K. This tantalum-rich telluride, which is the first stable dodecagonal phas…
We present a new method for realizing the adiabatic connection approach in density functional theory, which is based on combining accurate variational quantum Monte Carlo calculations with a constrained optimization of the ground state many-body wavefunction for different values of the Coulomb coupling constant. We us…
Tempering of polystyrene films containing the novel liquid crystalline coronenebis(dicarboximide)s 2, which are formed by an easy route from perylene-3,4;9,10-tetracarboxylic dianhydride (1), leads to a shift of the emission within a few seconds. This could be used for dot-by-dot coloring and thus optical displays. Th…
We present Monte Carlo and Langevin micromagnetic calculations to investigate thermal switching of single-domain ferromagnetic particles. For the Monte Carlo study we place particular emphasis on the probability that the magnetization does not switch by time t. We find that this quantity has different behaviors in dif…
We present an overview of the subject of Magnetic Particles, starting at a level suitable for advanced high-school students and ending at a level suitable for current practitioners in the field. The sub-topics covered include: Types of Magnetic Materials, Relationships Between the Vector Fields, Magnetic Energies, Dyn…