Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Polyaniline (PANI) and polyaniline/fly ash (PANI/FA) composites with various concentrations of fly ash (20%, 40% and 50%) were synthesized by the process of in‐situ polymerization. The samples were characterized by powder X‐ray diffraction, thermogravimetric analysis, infrared spectroscopy, and scanning elect…
ABSTRACT: In this study, the viscoelastic properties of a low-density polyethylene (LDPE) filled with glass beads (GBs) are measured at 150 C by means of a capillary rheometer to identify the effect of the particle size on the melt viscoelasticity. The volume fraction of the GB was 8.4%. The surface of the particles h…
By transesterifying rapeseed oil with tr iethanolamine or glycerol, polyols with a hydroxyl number of 290-310 mg KOH/g were synthesized. Water-blown rigid polyurethane foams (PUFs) with an isocyanate index of 150-250 were obtained from rapeseed oil polyols. Studies on the effect of the concentration of potassium oleat…
ABSTRACT: In this article, a procedure for recycling of polypropylene (PP)-based sandwich panels is presented. PP/glass laminates as the skins and PP foam as the core material are used. The waste panel is converted into short-fiber composite material. The panel is first ground by a mill and homogenized in a mixer or a…
A series of cholesteric side chain elastomers with odd and even numbers of atoms along the spacer chain were prepared. Varying the content of odd and even spacer groups resulted in anisotropic main chain conformations changing from prolate to oblate. The conformation anisotropy was characterized by temperature-depende…
Abstract In the present work the Er‐substituted Sr hexaferrite, SrFe 12– x Er x O 19 , prepared by sol–gel self combustion and subsequent heat treatments, is investigated. The combusted powders were annealed at 800, 900 and 1000 °C for 5, 10, 20, 40, 80, 160 and 320 min. The influence of annealing temperature and time…
Abstract DFT calculations were carried out to investigate the electronic and redox properties of nitrido‐functionalized polyoxometalate species, [PW 11 O 39 (ReN)] n – ( n = 3, 4, 5) and [PW 11 O 39 (OsN)] 2– . The rhenium‐ and osmium‐nitrido effectively modify the electronic properties. The LUMOs in fully oxidized [P…
To analyze the conducting and magnetic properties near the film and substrate interface in manganites, ultrathin films $(\mathrm{thickness}\ensuremath{\le}100\phantom{\rule{0.3em}{0ex}}\mathrm{\AA{}})$ of ${\mathrm{La}}_{0.7}{\mathrm{Sr}}_{0.3}{\mathrm{MnO}}_{3}$ were epitaxially grown by molecular-beam epitaxy on sin…
SiO 2 has long been recognized as an inert diluent and usually used as an enhancing agent in thermoplastic polymers. Few reports are presented about its use as additive flame retardant. In this article, the flame retardant synergistic effect of SiO 2 with aluminum hydroxide (ATH) on linear low density polyethylene and…
We report that ultrathin multilayered films fabricated from plasmid DNA and synthetic polyamines undergo nanometer-scale transformations that resemble spinodal decomposition when incubated in aqueous media. The patterns and structures generated by this transformation are similar to those observed for the spinodal dewe…
Abstract The complex thermal behavior of poly( l ‐lactic acid) films crystallized from the melt, either isothermally or nonisothermally, was studied by differential scanning calorimetry (DSC), wide angle X‐ray diffraction, and small angle X‐ray scattering. The variation of the thermal behavior with crystallization tem…
ABSTRACT: In the first part of this study, fiber-reinforced microcellular foams were produced via injection molding to study their morphological properties as a function of mold temperature as well as wood, blowing agent, and coupling agent concentrations. Yellow birch wood fibers are added to a recycled postconsumer…
Using a laser monitoring observation technique, the solubilities of sodium cefotaxime (A) in binary water (B) + 2-propanol (C) solvent mixtures were determined by the synthetic method from 278.15 K to 308.15 K and in the solvent composition ( ) range from 0.025 to 1.000. The results of these measurements were correlat…
Composite films of polypyrrole-poly(vinyl sulphonic acid) (Ppy-PVS), polypyrrole-p-toluene sulphonic acid (Ppy-pTS) and polypyrrole-dodecylbenzene sulphonic acid (Ppy-DBS) were synthesized on ITO coated glass, using electrochemical polymerization. The synthesized films were characterized using electrochemical techniqu…
The layered cobaltites ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Co}{\mathrm{O}}_{4}$ have been complexly studied over the range of mixed ${\mathrm{Co}}^{3+∕4+}$ valency and their properties discussed in comparison with cubic perovskites ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}\mathrm{Co}{\ma…
Ethoxylated FSM-type mesoporous silica (folded-sheet mesoporous material) with a pore diameter of 6.2 nm (FSM6.2) remarkably enhances rigidly of the structure in aqueous solutions. The esterified material could be used successfully as an adsorbent to accommodate subunit protein, methemoglobin (Fe(3+)). Furthermore, me…
In this study, fiber-reinforced microcellular foams are produced via injection molding and studied as a function of mold temperature as well as wood, blowing agent, and coupling agent concentrations. Birch wood fibers are added to a post-consumer recycled HDPE/PP matrix (85: 15 ratio) in proportions ranging from 0 to…
We systematically measure and analyze x-ray absorption fine structure and the anomalous Hall effect of recently discovered room-temperature ferromagnetic semiconductor thin films, ${({\mathrm{In}}_{1\ensuremath{-}x\ensuremath{-}y}{\mathrm{Fe}}_{x}{\mathrm{Cu}}_{y})}_{2}{\mathrm{O}}_{3\ensuremath{-}\ensuremath{\sigma}}…
Making films: Ordered aluminosilicate films are grown on a Mo(112) substrate, and their structures are determined through high-resolution experiments and density functional theory calculations. At low Al/Si ratios, aluminum atoms partially replace the silicon atoms of the silica structure. The resulting aluminosilicat…
Wood-fiber reinforced polylactide is a biodegradable composite where both fibers and matrix are from renewable resources. When designing new materials of this kind, it is useful to measure the influence of fiber–matrix interface properties on macroscopic mechanical properties. In particular, a quantitative measure of…