Extending the methodology of X-ray crystallography to non-crystalline specimens
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Materials Literature
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Ester Cross-Linking of Polycarboxylic Acid Scale Inhibitors as a Possible Means to Increase Inhibitor Squeeze Lifetime
Ester Cross-Linking of Polycarboxylic Acid Scale Inhibitors as a Possible Means to Increase Inhibitor Squeeze Lifetime Øystein Bache; Øystein Bache RF-Rogaland Research Search for other works by this author on: This Site Google Scholar Svante Nilsson Svante Nilsson RF-Rogaland Research Search for other works by this a…
Is the Folded-chain Structure Possible in Cellulose Molecule?
The folded chain structures in cellulose molecule were investigated through molecular dynamics simulation technique. The chain molecules based on the flexible ring structure model of glucose residues were applied for the simulation. The conformational transitions of the ring structures were not detected during the sim…
Passivation of Carbon Steel in a High Temperature Concentrated LiBr Solution Containing Hydroxide and Molybdate Ions
Carbon steel has been utilized well as a structural material in a commercial adsorption refrigerating system with help of corrosion inhibitors : most typically, hydroxide and molybdate ions. In this study, X-ray photoeletron spectroscopy (XPS) analysis has been carried out on the films formed on carbon steel exposed i…
Simultaneous Codeposition of .ALPHA.-Alumina Particle and PTFE Particle with Nickel from Watts Type Bath.
The simultaneous codeposition of PTFE and α-alumina with nickel from Watts type bath was investigated. Nonionic surfactant (Triton-X 100) was added to the bath as a dispersing agent of PTFE. In the absence of α-alumina, PTFE particles did not codeposit, while they could codeposit in the presence of α-alumina pariticle…
COMPARISON OF DAMAGE TOLERANCE OF INTEGRALLY STIFFENED AND RIVETED STRUCTURES
Crack resistance of aluminium alloys used in Russian riveted and integrally stiffened airplane structures is outlined. Experimental data on crack growth duration and residual strength of riveted and integral structures are compared.
Synthesis of poly[(2-oxo-1,3-dioxolan-4-yl)methyl vinyl ether-co-N-phenylmaleimide] and its miscibility in blends with styrene-acrylonitrile or poly(vinyl chloride)
The aim of the study was to investigate the synthesis of a copolymer bearing cyclic carbonate and its miscibility with styrene/acrylonitrile copolymer (SAN) or poly(vinyl chloride) (PVC). (2-Oxo-1,3-dioxolan-4-yl)methyl vinyl ether (OVE) as a monomer was synthesized from glycidyl vinyl ether and CO2 using quaternary a…
Preventing gelation in polyisoimide synthesis
The origin of the gel formation during the conversion of poly(amic acid)s to polyisoimides, and methods for its prevention are described. The gelation behaviour was studied as a function of the cyclodehydration temperature, the concentration and end-groups of 4,4′-oxydianiline/4,4′-oxydiphthalic anhydride poly(amic ac…
Role of Alumina Sol on the Physical Properties of Low Cement Castables
This paper deals with the performance of alumina bearing sol, prepared through sol-gel route, when used as a bonding agent in low cement refractory castable composition. The physical properties of the samples prepared by different processing technique (tapping and vibration) are compared. The results indicate that the…
Solidification with a Quasiequilibrium Mushy Zone: Exact Analytical Solution
The model of nonlinear equations for solidification in the presence of a quasiequilibrium mushy gone is solved analytically. Concentration, temperature fields, bulk fraction of the solid phase in the mushy zone, and the mushy region width are found theoretically.
Magnetic Domain Structures of Nd–Fe–B based Permanent Magnets Studied by Electron Holography and Lorentz Microscopy
Magnetic domain structures of Nd2Fe14B based permanent magnets were studied by using electron holography and Lorentz microscopy. In a sintered Nd2Fe14B permanent magnet, a domain wall width of a 180° magnetic domain was evaluated to be 5.1 nm by Lorentz microscopy, while the magnetization distribution in the 90° magne…
Boundary conditions, solitons, and spin configuration in interchain coupled organic ferromagnetic polymers
With an extended Su–Schrieffer–Heeger Hamiltonian including Hubbard energy and intersite Coulomb repulsion, we study the effects of two kinds of boundary conditions on the spin configuration and lattice distortion in organic ferromagnetic polymers with interchain coupling. It is shown that if the length L of the latti…
Study on thermal degradation mechanisms of comb polyacrylates containing long fluorocarbon side chains by TG/FTIR
Thermal degradation of two series of polyacrylates containing long fluorocarbon chains [abbr.: PFnA {HCF2(CF2)n−1 CH2OC(O), n = 4, 6, 8, 10} and abbr.: PFFnEA {CF3(CF2)n−1 CH2CH2OC(O), n = 6, 8, 10}] was investigated by TG /FTIR. Thermal degradation behavior of polymers changed depending on the type of tie g…
Preparation and characterization of soluble copoly(aryl ether ketone)s containing hindering structures
New copoly(aryl ether ketone)s have been synthesized by polycondensation of 2,2′,3,3′,6,6′-hexaphenyl-4,4′-diphenol, 2,2′-p-hydroxyphenyl-iso-propane, and 4,4′-difluorobenzophenone. The technology of 13C-NMR was used to determine contents of the two bisphenols in the copolymers. Chain structure was characterized by il…
Minerals from Macedonia V.Characterization of gypsum, barite and their synthetic analogues by FTIR and RAMAN spectroscopy
The Fourier transform infrared (FfIR) and Raman spectra of gypsum (CaS04'2H20) and barite (BaS04) from various localities in Macedonia were studied. Contrary to the group-theoretical predictions, it was found that the band originating from the V2 sulfate mode (expected at around 450 cm-I) does not appear in the infra…
10.51847/E7JaDiu
Niosomes or non-ionic surfactants vesicles are microscopic lamellar structures formed on the admixture of a non-ionic surfactant, cholesterol and phosphate with subsequent hydration in aqueous media. The delivery of drugs by “vesicular drug delivery system” such as niosomes provides several important advantages over c…
Optimization of flax fiber separation by leaching
The abilities of four chelators to separate bast fibers of non-retted oilseed flax from each other and the core and cuticle have been investigated at different pH level. EDTAand DTPA separate fiber ...
Abrupt appearance of the domain pattern and fatigue of thin ferroelectric films
We study the domain structure in ferroelectric thin films with a ‘passive’ layer (material with damaged ferroelectric properties) at the interface between the film and electrodes within a continuous medium approximation. An abrupt transition from a monodomain to a polydomain state has been found with the increase of t…
High Performance HVDC Polymer Cable
This Paper describes the modified HDPE (into which a small amount of acid group is grafted as modified group) insulated cable as a high performance HVDC polymer cable. It has been confirmed that the high performance DC and impulse breakdown strength of modified HDPE results from the two aspects : (1) the improvement i…
DEVELOPMENT OF REMOTE DISMANTLING SYSTEMS FOR DECOMMISSIONING OF NUCLEAR FACILITIES
number: 262 ABSTRACT In the Japan Power Demonstration Reactor decommissioning program remote handling technologies were developed that could be successfully applied to dismantling the core components and verified by successful work accomplishment. However, wider applications and intelligence to the work process were r…