Materials Literature
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Abstract The structure/property relationships and morphology of glass bead–reinforced syndiotactic and isotactic polypropylene composites containing 0 to 20 vol% thermoplastic elastomer (TPE) were studied. Polystyrene‐block‐poly(ethylene‐co‐butylene)‐block‐polystyrene (SEBS) and the corresponding block copolymer graft…
The forced oscillations of a system consisting of two finite liquid columns in a duct separated by a gas bubble are studied in the linear approximation. It is found that thermal processes in the gas induce a very significant damping in the system, which can exceed viscous damping even in capillaries with a submillimet…
To study the size effects in ferroelectric thin films, we investigated the crystal structure and Raman spectra of BaTiO3 thin films deposited by rf magnetron sputtering technique. The results indicated that the characteristic of tetragonal phase disappears for thin films with an average size below 55 nm. The lattice p…
In addition to the well-known spectrum of Czochralski-grown silicon, two infrared bands at 560 and 648 cm−1 are found to arise from the interstitial oxygen in silicon. The assignment of the bands is performed using the studies of their oxygen isotope shift and temperature dependence. The 560 cm−1 band is attributed to…
A hydrostatic high-pressure cell (maximum pressure 700 MPa) with synthetic diamond windows is applied to measure small-angle X-ray scattering of a protein at high pressure. Use of the present cell allows an accurate solvent background correction, providing quantitative analyses. The performance of the present cell for…
The use of a phenomenological model to describe relaxation in the glassy state is reviewed, and it is shown that many important glass transition phenomena may be interpreted in this way. The key parameters of the model (the non-linearity parameter x, the non-exponentiality parameter β, and the apparent activation ener…
Thin oxide films play an important role in the corrosion of metals. Using XPS it is possible in principle to obtain information on the chemical state of near-surface atoms, the stoichiometry of the surface layer and its thickness. A problem is the quantification of XPS spectra, due to the large uncertainty in the valu…
Langmuir-Schaefer (LS) films of poly(o-anisidine) (POAS) were fabricated and characterized by means of Brewster-angle microscopy, ellipsometry and electrochemical techniques. The studied optical, cyclic voltammetric and ellipsometric properties of films underlined a regular deposition up to at least 40 monolayers of P…
LMTO-ASA nonempirical self-consistent method has been used to study the electron band structure of the cubic antiperovskites M 3 M’C (M=Mn, Fe; M′=Zn, Al, Ga, Sn) in ferromagnetic state, and to calculate the local atomic magnetic moments. The results obtained are compared with previous calculations and available exper…
Network polyesters were prepared from1,1,1-trimethylolethane (Ye), 1,1,1-trimethylolpropane (Yp), 1,2,3,4-butanetetrol (Xe), and d -glucitol (Zs) with aliphatic dicarboxylic acids containing different numbers of methylene groups (HOOC(CH 2 ) n - 2 COOH, n =4, 6−14, 16, and 20). Prepolymers prepared by melt polycondens…
Rhombohedral lead zirconate titanate (PZT) ceramics were evaluated statically and dynamically to examine the relationship between domain structures and electrical properties. The poling field dependence of the electrical properties and crystal orientation was investigated as a statical evaluation. When the poling fiel…
Abstract Low molecular-weight natural rubber (LNR) and LNR latex was prepared by oxidative degradation of de-proteinized natural rubber (DPNR) latex in the presence of 1 phr of K 2S2 O 8 and 15 phr of propanal, by shaking at 60 °C. The intrinsic viscosity [η] of DPNR with only K 2 S 2 O 8 decreased from 7.2 to 5.5 aft…
Abstract Lightly boron-doped polycrystalline diamond thin films prepared on single crystal silicon wafers via chemical vapor deposition (CVD) were treated with chlorine (Cl2) under ultraviolet (> 200 nm) photoirradiation and then heated in boiling pyridine. Ex situ X-ray photoelectron spectroscopic measurements…
The zeolites belong to the category of high surface area ceramics. Their exceptional catalytic properties and performance as solid electrolytes are linked with the composition pore geometry, the distribution of T-atoms, and the nature and mobility of the adsorbed phases. Parallel conductivity and dielectric relaxation…
This paper is a shortened version of an NRPB document that reviewed the deterministic effects on human health likely to arise from serious overexposure to ionising radiation. Little new primary information on deterministic effects has become available in recent years. However, advances in techniques for data analysis…
The structure of Co 2 Al 5 ( hP 28, P 6 3 / mmc ) was refined by means of Rietveld method. The shortest Co–Al distance amounts 2.338 Å. Co 2 Al 5 shows a homogeneity range between Co 29 Al 71 and Co 27.5 Al 72.5 at 1125 K. The concentration dependence of lattice parameters was also measured. The axial ratio c / a incr…
Attachment of oxazoline-based hyperbranched macromonomers to a trimesic acid core affording trimers of the hyperbranched fragments as well as polymerization of the oxazoline groups is reported. Polymerization and copolymerization with 2-phenyl-1,3-oxazoline were investigated for two macromonomers (Mw = 1700 and 8 000,…
The piezoelectric properties of Pb[Zr 0.45 Ti 0.5‐ x Lu x (Mn 1/3 ‐Sb 2/3 ) 0.05 ]O 3 ceramics, with 0 lessthan equal to x lessthan equal to 0.03, have been investigated. The partial substitution of Ti 4+ with Lu 3+ permitted improvement of the electromechanical coupling factor ( k p ), the dielectric constant (epsilo…
Optical scatterometry is a method for the on-line measurement of the geometry of a diffraction grating, which is deduced from diffraction-pattern data. We demonstrate the use of a neural network as a promising method for performing an accurate quantitative characterization of the geometry. As an example, we show the d…
Spatially selective electrochemical deposition of a metal (Ni) into the ordered nanohole-array structure of anodic porous alumina was performed using a microelectrode. A patterned deposit consisting of fine Ni cylinders of 70 nm diameter was obtained in the hole-array structure with spatial resolution on the order of…