Materials Literature
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Molecular dynamics simulations of SPC/E water confined in a silica pore are presented. The simulations have been performed at different hydration levels and temperatures to study the single particle dynamics. Due to the confinement and to the presence of a hydrophilic surface, the dynamic behaviour of the liquid appea…
Viscoelastic behavior at elevated temperatures of high-density polyethylene and isotactic polypropylene was investigated by using the stress relaxation method. The results are interpreted from the view of an established two-process model for stress relaxation in semicrystalline polymers. This model is based on the ass…
The fracture behavior of ABS materials with a particle diameter of 110 nm and of 330 nm was studied using instrumented Charpy impact tests. The effects of rubber content and temperature on fracture behavior, deformation mode, stable crack extension, plastic zone size, J-integral value, and crack opening displacement w…
Abstract A recently introduced predictive scheme is used to calculate the permeability of various types of heterogeneous polymer blends, which are characterized by the ratio of the permeability of constituents in the range 10–10,000. The scheme combines a two‐parameter equivalent box model and the data on the continui…
The complexation of a carboxylate functionalized hexabenzocoronene with an amino functionalized polysiloxane results in a polymeric complex, which forms two highly ordered discotic columnar liquid crystalline structures Col1 and Col2. By using small-angle X-ray scattering it was shown that four columns per unit cell a…
Electrochemical deposition of zirconia on stainless steel has been investigated in order to provide supports of catalysts for NOx reduction. The zirconia films have been obtained in electrolytes based on anhydrous ethyl alcohol. The structure and chemical composition of the films have been characterized by SEM and XPS…
Zircaloy-2 plate with neutron exposure more than 3 × 1026 n/m2 (E > 1 MeV) has been tested to study the effects of ultra-high neutron fluence on the mechanical and physical behavior of Zircaloy-2. The Zircaloy-2 plate used in this study is a section of a 6.4-mm-thick control blade follower that resided in a pre…
An oxalate coprecipitation method was applied to produce rare-earth-doped ceria powders (Ce0.8R0.2O1.9, R=Yb, Y, Gd, Sm, Nd and La). The powders calcined at 600°C were isostatically compacted and sintered at 1600°C in air to reach a relative density exceeding 98%. The electrical conductivity of rare-earth-doped ceria…
Two new photoluminescent homoleptic distorted tetrahedral CuIN4 chromophores with CuII/I potentials of 0.66–0.81 V vs. SCE are isolated by using two unconjugated diimines (2∶1 condensates of R1R2CO and ethylenediamine; R1 = Ph, R2 = H; R1 = R2 = Ph) as ligands.
In this work, a Taguchi experimental design has been used to identify important factors that influence the procedure of synthesis and purification of the lutetium bisphthalocyanine (LuPc2). The working conditions have been improved using an L8 (27) experimental design. A statistical analysis of the experimental data r…
ZnO thin films were grown on Si(100) and sapphire (001) substrates by an in situ ultraviolet‐assisted pulsed laser deposition technique. Using this technique, highly textured ZnO films were grown on Si substrates even at 100°C. Films grown on sapphire (001) at temperatures higher than 400°C, were found to be epitaxial…
A modified reverse micelle process has been developed for the synthesis of nanospherical amorphous zircon precursor powders. It has been found that the hydrolysis of a mixture of zirconium and silicon alkoxides within the water phase of a microemulsion can produce amorphous, nanospherical particles with a stoichiometr…
The sixfold phenyl embrace (6PE) is manifest in the crystal structures of approximately 30% of the 5089 molecules with PPh3 ligands (in the Cambridge Structural Database). This paper describes the characteristics and occurrence of the 6PE as a crystal supramolecular motif between metal complexes and clusters with PPh3…
Polyurethane-urea without ether linkages was synthesised using dicyclohexyl-methane diisocyanate (SMDI), hydroxy-terminated polybutadiene (HTPBD) and m-phenylenediamine (PDA). The hydrolytic stability of this polymer was investigated under in vitro conditions using Ringer's solution and phosphate-buffered saline, and…
The cathodic reaction mechanism of a solid oxide fuel cell (SOFC) was investigated for an electrode‐electrolyte system of La 0.6 Ba 0.4 CoO 3 ( LBC ) ‐ BaCeO 3 , under both the O 2 − conducting and H + / O 2 − mixed‐ionic conducting conditions. AC impedance measurements were carried out, and the electrode interfacial…
At present, only a little is known about the transcriptional regulation in chondrocytes submitted to various physicomechanical factors known to exist in articular cartilage. Recently, we have investigated the effects of hydrostatic pressure on transcriptional control in chondrocytes using human chondrosarcoma and immo…
Ozonation of aqueous solutions of succinic acid ([SA]0=1 mM) was studied in the presence of ruthenium (2%) deposited on cerium dioxide catalysts. The influence of ruthenium, of the catalyst preparation mode (impregnation or exchange), of the support pretreatment, of the surface area and of the final treatment of the c…
The [CaM(mal)2(H2O)4] (M = Mn, Fe or Co; mal = C3H2O4) and [CaNi(mal)2(H2O)4]·2H2O compounds have been synthesized and characterized. X-Ray single crystal diffraction analysis was carried out on the [CaMn(C3H2O4)2(H2O)4] and [CaNi(C3H2O4)2(H2O)4]·2H2O complexes. The [CaM(C3H2O4)2(H2O)4] (M = Fe or Co) compounds are co…
Post-synthesis recrystallisation of calcined small crystallite MCM-41 has been used to prepare highly ordered large crystallite MCM-41 materials in a two step synthesis route. The calcined small crystallite `primary' MCM-41, obtained from the first step, is used as the `silica source' in an otherwise normal secondary…
This research explores the longitudinal and latitudinal mechanical properties of injection-molded isotactic polypropylene (iPP) prepared in a uniaxial oscillating stress field by oscillating packing injection molding (OPIM). The methods, processing conditions, and mechanical test results for iPP by conventional inject…