Materials Literature
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Poly(vinylidene fluoride) (PVDF)/polyamide 12 (PA12) blends showed new peaks in XRD profile with increasing PA12 and the crystallinity of PA12 significantly decreased with the addition of PVDF. PVDF showed three relaxation regions at about −40, 40, and 100°C, respectively, and glass transition temperature (Tg ) of PA1…
The formation of crevice corrosion on type 304L stainless steel when immersed in 0.05 M ferric chloride solution has been used to investigate electrochemical potential noise measurements. The surface activity of the stainless steel was simultaneously studied using a scanning electrode technique to provide corroboratin…
HAZARDOUS WASTE SOURCES AND EFFECTS Hazardous Waste Defined Hazardous Waste Sources Effects of Hazardous Waste CHARACTERIZATION, SAMPLING, AND ANALYSIS Hazardous Waste Characteristics Sampling and Analysis Compatibility RISK MANAGEMENT AND WASTE MANAGEMENT The Hazard Ranking System and the National Priority Lists Risk…
Volume: 76
Delayed fracture in steel has been correlated with concentration of hydrogen to the point of crack initiation. In the present study, effects of plastic deformation and stress gradient on hydrogen diffusion in carbon steels were studied with hydrogen microprint technique (HMT), which can visualize points of hydrogen em…
For more than a century Frustulia saxonica was considered to be an infraspecific variety of F. rhomboides. A search for the type of the basionym, Navicula rhomboides Ehrenberg, revealed that Navicula rhomboides is not a Frustulia. A lectotype is presented for N. rhomboides Ehrenberg. As a consequence twelve new nomenc…
Poly(2-vinyl pyridine) [P2VP] and poly(4-vinyl pyridine) [P4VP]/copper iodide binary mixtures were studied by differential scanning calorimetry (DSC) in order to investigate the phase behavior of the blends at microscopic level. The glass transition temperature (Tg) of the P2VP/copper iodide binary mixtures as compare…
Ru(II) diimine complexes having phosphonic acid substituents adsorb to TiO2 modified ITO electrodes and exhibit electrogenerated chemiluminescence when potentiostated at positive voltages in the presence of oxalate in buffered aqueous solutions.
Doped lanthanum chromites show lattice expansion under high temperature reducing atmospheres. We have proposed a numerical simulation model for analyzing the static and the transient expansion behavior of the doped lanthanum chromites under a stationary oxygen potential gradient or a stepwise change of oxygen potentia…
Modeling the hysteresis behavior of soft magnetic materials based on Preisach theory, requires a Preisach distribution function characterising the material. Although it is possible to obtain all the data for a classical Preisach model from experimental first-order curves, obtaining the Preisach distribution function b…
Thirteen pregnane glycosides were isolated from fresh leaves of Marsdenia tomentosa collected in the Fukuyama district. Of these, six were glycosides previously obtained from the same plant collected in the Fukuoka district and one from another Asclepiadaceous plant. The structures of the six new glycosides were deter…
In this article we report the transesterification of jute with n-Butylacrylate (BA) under appropriate condition using NaOH, Pyridine (Py), and a Pyridine–acetone mixture as a catalyst. The modified vinylog jute was subsequently cured with benzoylperoxide (BPO) in acetone at 50–60°C. The parent and chemically modified…
Pyrolysis gas chromatographic analysis of polyacrylonitrile under an inert atmosphere was made in a temperature region of 500–900°C. It was confirmed that the main degradation products are various kinds of lower nitriles that include CH2CHCN, CH3CN, and HCN. In addition, lower hydrocarbons such as CH4 and C2H4, which…
The transimidization reaction has been successfully utilized to prepare a series of segmented block copolyimides. The synthesis and polymerization of an AX-type amino imide monomer containing the tetrahydro[5]helicene unit were accomplished. The AX-type amino imide monomer is stable during isolation and purification,…
The water sorption behavior and the activation energy were investigated for various chemical structure polyimide thin films; BPDA-PDA, BPDA-ODA, PMDA-ODA, and 6FDA-ODA. The activation energy for the water diffusion varied in the range of 5.53 to 9.27kcal/mol, and was in the increasing order: BPDA-PDA < BPDA-ODA < PMDA…
CsBr doped with Ga+ has previously proved to be an efficient X-ray storage phosphor with a figure of merit comparable to that of the commercially used BaFBr:Eu2+. By measuring the magnetic circular dichroism of the optical absorption (MCDA), the MCDA-detected electron paramagnetic resonance and the photostimulated lum…
Chelating polymer granules containing amidoxime chelating groups were synthesized by radiation-induced homopolymerization of acrylonitrile monomer. The chemical reactive intermediate polyacrylonitrile was treated with hydroxylamine solution to convert the chemical active cyano groups into the amidoxime groups. Kinetic…
Selective catalytic reduction (SCR) of NO with propene (C3H6-SCR) and propane (C3H8-SCR) over different levels of Cu(II) or Co(II) ion exchanged into ZSM-5 zeolite has been evaluated under flowing conditions with 1500 ppm of NO + 4500 ppm of C3H6 or C3H8 + 3 vol.% of oxygen in helium at a gas hourly space velocity of…
First results of an inter-laboratory comparison (27 participants in Europe, Japan and USA) of XPS data obtained with non-conducting samples are presented. Binding energies of Al 2s for alumina, N 1s and imide C 1s for Kapton and Sr 3p3/2 for a strontium titanate film on glass were obtained after static charge referenc…
(Ba, Sr)TiO 3 (BST) thin films have been grown on planar Ir/Si and Pt/Si substrates and on three-dimensional (3D) Ir electrodes by metalorganic chemical vapor deposition using two kinds of β-diketonate-based BST precursors. Film growth was studied as a function of film thickness, composition, and substrate temperature…