Materials Literature
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Experimental solubilities are reported at 25.0°C for diphenyl sulfone dissolved in 25 different organic nonelectrolyte solvents containing ether-, chloro-, hydroxy-, ester, methyl-, and tert-butyl-functional groups. Results of these measurements, combined with previously reported diphenyl sulfone solubilities taken fr…
The ReO3-type structure NbO2F, niobium dioxyfluoride, has been studied at high pressures using diamond anvil cells and synchrotron X-ray radiation. High-pressure powder diffraction measurements have been performed up to 40.1 GPa. A phase transition from the cubic (Pm3m) ambient pressure structure to a rhombohedral (R3…
The alkyd resin of short oil length with low acid value was modified with novolac‐based epoxy esters, prepared by using tobacco seed oil fatty acids. The prepared blends were cured using an aliphatic amine as curing agent. The films of cured resins were applied over various panels and their film characteristics were s…
Abstract Kaolinite hydroxyls in dimethylsulphoxide-intercalated (DMSO-intercalated) kaolinites have been determined using Raman spectroscopy at 298 and 77 K. The inner surface hydroxyl frequencies at 3650, 3670, 3684 and 3693 cm -1 move to higher wavenumbers upon cooling to 77 K and are observed at 3659, 3676, 3692 an…
The periodic tricontinuous network structure (TNS) of symmetric isoprene (I)–styrene (S)–2-vinylpyridine (P) triblock copolymers has been studied by small-angle X-ray scattering (SAXS). The observed SAXS profiles were compared with the calculated diffraction intensities based on the model electron density distribution…
Abstract Structure development in polybutylene terephthalate (PBT) and thermoplastic elastomers (TPEs) based on PBT during the melt spinning process was investigated. Melt spun filaments were examined using wide angle X‐ray diffraction and birefringence. Crystalline orientation was characterized in terms of Hermans‐St…
The coupling of a water-based electrochemical cell and fuel cell are discussed as a means to \nform a refrigeration cycle. In the proposed configuration, the process fluids can be passively \ndriven through the flow circuits. The cycle requires low direct current voltages for driving the \ncycle. Current d…
Small-angle X-ray scattering (SAXS), which determines the radius of gyration, Rg, and the pair distance distribution function, was used to investigate the conformational changes of calmodulin (CaM) on binding to an antagonist, trifluoperazine (TFP), with or without Ca2+ in solution. We previously applied this SAXS met…
Four new apatitic phases were prepared and their structures determined. The structure of Ca 10 (PO 4 ) 6 S was refined from single crystal X-ray data and the structures of Sr 10 (PO 4 ) 6 S, Ba 10 (PO 4 ) 6 S and Ca 10 (PO 4 ) 6 Se from powder X-ray data using the Rietveld method. The four apatites are isostructural a…
The physical properties of glasses in the Ge 30 As 10 Se (60— x ) Te x system with x = 25, 28, 30, and 35 at.% Te, the Ge 30 As 10 Se 30 Te (30— y ) I y system with y = 5, 10, 20, and 30 at.% I, the Ge 30 As 10 Se 35 Te (25— z ) I z system with z = 2, 6, 10, and 20 at.% I, and the [Ge 30 As 10 Se 30 Te 30 ] (100— w )…
PET wastes were depolymerized by glycolysis at different weight ratios of propylene glycol at 200°C and in the presence of zinc acetate as catalyst. The glycolyzed products were identified by GPC, IR and MS techniques. It was found that the glycolyzed products consisted mainly of dimer and trimer of bis-hydroxy propyl…
It is shown that there are two routes of electrical transport in luminescent porous silicon. The first is between silicon crystallites and the other is through a disordered silicon compound tissue that wraps the crystallites. The conduction mechanism in the first route is similar to that encountered in granular metals…
A method for analyzing the elasticity problem of cubic quasicrystal is developed. The axisymmetric elasticity problem of cubic quasicrystal is reduced to a single higher-order partial differential equation by introducing a displacement function. As an example, the solutions of elastic field of cubic quasicrystal with…
Carbothermal reduction—nitridation (CRN) of SiO 2 is an attractive method to manufacture Si 3 N 4 powders with controlled grain morphology. Moreover, β‐SiAlON powders could also be synthesized from either pure powder mixture or some inexpensive raw minerals by CRN and the resulting powders favored the sintering of SiA…
HfV2O7 powders were prepared by means of thermal decomposition of a mixture of vanadyl and hafnyl oxalates in air at 973 K. The room temperature structure and its evolution with temperature was investigated using both electron microscopy (TEM and HREM) and powder diffraction (X-ray and neutron) techniques combined wit…
The preparation of vanadate glasses containing barium oxide and their electrical properties in the temperature range of 80–500 K have been reported in this article. Analysis of the electrical properties has been made in the light of different hopping models. The multiphonon assisted hopping model of small polarons in…
Driven by differing statutory mandates and programmatic separation of regulatory responsibilities between federal, state, and tribal agencies, distinct chemical and radiation risk management strategies have evolved. In the field this separation poses real challenges since many of the major environmental risk managemen…
In this paper, we present our recent results of studies of the nitrogen absorption process, magnetization measurements, and neutron powder-diffraction measurements for interstitially modified nitrides ${R}_{2}{\mathrm{Fe}}_{17}{\mathrm{N}}_{3}$ $(R=\mathrm{Y},$ Ce, Nd, and Sm) and ${\mathrm{Y}}_{2}{\mathrm{Co}}_{17}{\…
Abstract The processing properties of fibrous preforms and the final properties of liquid moulded composite parts are strongly related to the internal architecture of the preforms. The architecture of a preform is determined by the individual textile layers from which it is made. In order to calculate the processing a…
New methods were developed for the determination of the plasticization parameters and the limit diffusion coefficient of a penetrant whose diffusivity varies exponentially with its concentration. No specific computer softwares is required for their use and they are user friendly. The method using differential permeati…