Materials Literature
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Abstract The compatibilizing effect of the ionomer, poly(styrene‐ co ‐sodium acrylate) (PSSAc), on immiscible blends of polystyrene (PS)/polyamide 6 (PA6) was studied by mechanical tests and scanning electron microscopy. The PSSAc acts as an effective compatibilizer because both the deformation at break (%) obtained b…
The optical and magneto-optical (MO) spectra of the lanthanum monochalcogenides are investigated theoretically using the fully relativistic Dirac LMTO band-structure method. The LSDA calculations with shifted La $4f$ empty states describe quite well the shape and magnitude of the LaS MO spectra in an external magnetic…
This study investigated the relaxation behaviors of octadecylamine (ODA), stearic acid (SA), and SA/ODA mixed monolayers at the air/water interface. Area relaxations of monolayers at constant surface pressure were studied by a nucleation and growth mechanism and by direct observation using a Brewster angle microscope…
Abstract Two different hydrogels, prepared from N ‐vinyl‐2‐pyrrolidone/acrylic acid (NVP/AAc) and N ‐vinyl‐2‐pyrrolidone/acrylamide (NVP/AAm), were studied for the separation and extraction of some heavy‐metal ions from wastewater. The hydrogels were prepared by the γ‐radiation‐induced copolymerization of the aforemen…
Abstract Composites of palm fibers and poly(propylene) (PP) were compounded in an extruder at 200°C. The composites were subsequently injection molded into standard tensile specimens for mechanical characterization. The fracture morphology of the specimens was analyzed by scanning electron microscopy. It was observed…
Abstract Single crystals of Pb 3 O 2 (SeO 3 ) have been prepared hydrothermally at 230 °C. The structure (orthorhombic, Cmc 2 1 , a = 10.529(2), b = 10.722(2), c = 5.7527(12)Å, V = 649.5(2)Å 3 ) has been solved by direct methods and refined to R 1 = 0.059 on the basis of 615 unique observed reflections (| F o | = 4σ F…
Efficient quantitative phase field simulation using an adaptive finite volume method with an antisolutal trapping scheme is presented for a binary dendritic growth in a forced flow. For the case of no convection, the calculated results with different interface thickness are examined. It is found that with a proper ant…
Highly reflective and surface conductive flexible polyimide films have been prepared by the incorporation of silver(I) acetate and 1,1,1-trifluoro-2,4-pentanedione or 1,1,1,5,5,5-hexafluoro-2,4-pentanedione into a dimethylacetamide solution of the poly(amic acid) formed from 3,3‘,4,4‘-biphenyltetracarboxylic dianhydri…
Abstract This study attempted to correlate morphological changes and physical properties for a high rubber content acrylonitrile–butadiene–styrene (ABS) and its diluted blends with a poly(styrene‐ co ‐acrylonitrile) (SAN) copolymer. The results showed a close relationship between rubber content and fracture toughness…
Abstract A series of poly(fluoroalkoxyphosphazenes) containing a mixture of 2,2,3,3,4,4,5,5‐octafluoropentoxy and 2,2,2‐trifluoroethoxy substituents was synthesized. The series included polymers with 25–94% incorporation of the trifluoroethoxy substituent, as well as single‐substituent polymers with 100% octafluoropen…
(5Z)-4-bromo-5-(bromomethylene)-3-butyl-2(5H)-furanone (furanone) from the red marine alga Delisea pulchra was found previously to inhibit the growth, swarming and biofilm formation of Gram-positive bacteria (Ren et al., 2002, Lett Appl Microbiol 34: 293-299). In the present study, the Gram-positive sulphate-reducing…
Abstract A new type of biodegradable starch‐based composites was prepared by injection‐molding using glycerol and water as plasticizers. Chitin flakes, obtained from shells of Penaeus schmitti , were used as reinforcing phase. The effect of chitin content on the structural and tensile properties of the composite sampl…
The corresponding author's email address was printed incorrectly at the bottom of p. 6 when this article was published. Dr. A. P. Kharitonov's correct email address is: khariton@binep.ac.ru We regret the error.
The misorientation dependence of the energy of grain boundaries in hcp metals is predicted by application of the disclination-structural unit model and continuum solutions for interfacial disclination dipoles in elastically anisotropic and inhomogeneous bicrystals. For symmetrical tilt boundaries in cobalt and titaniu…
Resonant x-ray diffraction in noncentrosymmetric crystals is studied by considering E1-E2 processes in the fast-collision approximation. The scattering amplitude is expressed in terms of polar and magnetoelectric operators of the valence states, which are involved in the resonance. Near-edge Bragg peaks from ferroelec…
Silane adhesion promoters are commonly used to improve the adhesion, durability, and corrosion resistance of polymer-oxide interfaces. The current study investigates a model interface consisting of the natural oxide of(100) Si and an epoxy cured from diglycidyl ether ofbisphenol A (DGEBA) and triethylenetetraamine (TE…
The synthetic vanadinites (Pb(x)Ca(10-x))(VO4)6(F(1-2y)O(y) (y))2, 0.57 < x < 9 and 0.10 < y < 0.47, adopt the P6(3)/m apatite structure with 9.7835 (3) < or = a < or = 10.0531 (1) A and 7.0318 (2) < or = c < or = 7.3033 (1) A. The calcium endmember is monoclinic, space group P2(1)/m, with a = 9.7370 (3), b = 9.7358 (…
The molecular dynamics of oligomeric poly(propylene glycol) (PPG) liquids (MW=1000, 2000, and 4000 g/mol) confined in a two-dimensional layer-structured Na-vermiculite clay has been studied by broadband dielectric spectroscopy. The alpha-relaxation and the normal mode relaxation processes were studied for all samples…
A temperature-independent proportional relation was discovered between magnetoresistance and magnetoentropy in metallic ferromagnets, ${\mathrm{La}}_{0.6}{\mathrm{Sr}}_{0.4}{\mathrm{CoO}}_{3},$ ${\mathrm{SrRuO}}_{3},$ and ${\mathrm{CoPt}}_{3}$ up to 90 kOe above, at, and just below Curie temperature. This concludes th…
The structure of La(1/3)NbO3 is that of a perovskite with La3+ cations ordered into alternate layers of perovskite A-sites. This is the description of a tetragonal structure and yet the room-temperature structure shows an orthorhombic distortion. The structure of La(2/3)TiO3 shows similar features. It has been recogni…