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 A convenient preparative method of the synthesis of dithienylethenes based on maleimides was proposed. Previously, difficult accessible dithienylethene derivatives, in which 2-thienyl substituents are attached to the double bond of maleimide, have been synthesized. The spectral properties of the dithienylmale…
The process of dyeing poly(ethylene terephthalate) - PET films at 50, 60 and 65ºC and poly(hydroxybutyrate) - PHB granules at 60, 70 and 80ºC using supercritical carbon dioxide (scCO2) as solvent and ethanol as cosolvent was studied by DSC, TGA analysis and measurements of shrinkage to determine the morphological modi…
Carbon fiber-reinforced PMR-type polyimide composites were prepared from T-300 carbon fibers and polyimide matrix resin derived from 4,4′-methylenediamine (MDA), p-phenylenediamine ( p-PDA), diethyl ester of 3,3′,4,4′-oxydiphthalic acid (ODPE) and monoethyl ester of cis-5-norbornene-endo- 2,3-dicarboxylic acid (NE). T…
Electroluminescence (EL) emission has been observed under AC field excitation in chemically deposited (dipping technique) films of (Zn-Cd)S:Cu,F using substrates of conducting glass plates. Results of XRD, SEM, absorption spectra, transmission spectra, EL emission spectra, voltage, frequency and temperature dependence…
Abstract The prismatic variety of fluoro-edenite, a new amphibole found in lavas from Mt Etna in Biancavilla (Catania Province, Sicily, Italy), has been characterized by μ-Raman and μ-FTIR spectroscopy. The wavenumbers at which the bands are detected in the μ-Raman and μ-FTIR spectra are compared with tremolite, asbes…
Mechanical performance of hydroentangled nonwovens is determined by the degree of the fiber entanglement, which depends on parameters of the fibers, fiberweb, forming surface, water jet and the process speed. This paper develops a computational fluid dynamics model of the hydroentanglement process. Extensive compariso…
Our contribution will describe the basic fundamentals of shape memory alloys. Emphasis will be given to specific characteristics for the use of shape memory wires in actuators. The investigation of shape memory wires in actuators includes qualitative and quantitative benchmarking based on measurements at different tes…
We’ve built this digital research platform to provide academics everywhere with fast, stable and secure digital access to our library of over 110,000 scholarly books and 800,000 journal articles. We’ve tested the platform in close cooperation with leading academic institutions. If you have any questions or you notice…
Abstract Ge‐filled carbon nanotubes (CNTs) with an average diameter of 15–100 nm, and Ge‐filled carbon microtubes (CMTs) with an average diameter of 100‐8000 nm, with diamondlike structures have been prepared by metal‐organic (MO)CVD from organogermanium precursors [(C 2 H 5 ) 4 Ge and (n‐C 4 H 9 ) 4 Ge]. These new co…
Liquidus temperatures (TL) were measured for the following float glass-type composition region (in mass%): 72?7 to 74?0 SiO2, 13?1 to 14?2 Na2O, 7?95 to 8?95 CaO, 2?97 to 3?97 MgO, 0?10 to 0?45 Al2O3, and 0?03 to 0?10 K2O. Glasses also contained constant minor fractions of Fe2O3 (0?71) and TiO2 (0?01). Fractions of si…
Films of polypropylene (PP) were grafted with glycidil methacrylate (GMA) using supercritical CO2 as swelling agent and solvent. Different pressures and temperatures were used to study their effects on the soaking and grafting process. FTIR results showed signals at 1726 and 1640 cm-1, assigned to C=O and C=C (after t…
The compound of single-component filled polypropylene (PP) (consists of either talc or CaCO 3 ) and multicomponent filled PP (talc/CaCO 3 /PP) are prepared by melt mixing using Brabender Plasticorder internal mixer. All systems exhibit good stability and normal flow in the molten state. The multicomponent filled PP ha…
Stable crystalline Lead Selenide nanoparticles (PbSe NPs) were prepared with a cubic (sphalerite) phase in polyvinyl alcohol (PVA) matrix. Moreover, XRD was used to characterize the PbSe NPs in PVA. The size were controlled by Pb:Se ions ratio in which the particle size was found to be inversely proportional to this r…
Thin-film barium strontium titanate (BST) capacitors were fabricated and applied to a power amplifier (PA). The PA using these capacitors in output matching network for PCS band was realized and the tunability of its output impedance was validated. The measured adjacent channel leakage power ratio (ACPR1) is -48.6dBc…
Com a finalidade de verificar a viabilidade do tijolo de terra crua (adobe) na execução de moradias, realizou-se pesquisa para identificar as características físicas e mecânicas do solo e definição de procedimentos e métodos de produção do mesmo, estabelecendo critérios que melhorem a qualidade do produto final. O sol…
This work presents the fabrication and characteristics of Bi₂O₃/Si heterojunction prepared by rapid thermal oxidation technique without any postdeposition annealing condition. The bismuth trioxide film was deposited onto monocrystalline Si and glass substrates by rapid thermal oxidation of bismuth film with aid of hal…
The temperature-dependent noise of individual, single-walled carbon nanotubes is measured here in a variety of different gases and liquids. The ambient environment is found to have only a weak relationship with device noise, even in cases where adsorption significantly changes the dc resistance. Correspondingly, a 450…
Small-angle X-ray scattering (SAXS) and dynamic light scattering (DLS) measurements were accomplished on sodium glycodeoxycholate (NaGDC) aqueous electrolyte solutions as a function of NaGDC and NaCl concentrations with the aim to determine with satisfactory approximation the NaGDC micellar aggregate structure at a gr…
Abstract Summary: To explore the potential of a star‐shaped 8‐armed poly(ethylene glycol)35K‐ block ‐poly( L ‐lactide)37K (8‐armed PEG35K‐ b ‐PLLA37K: $\overline M _{\rm n}$ of PEG = 35 000, $\overline M _{\rm n}$ of PLLA = 37 000) film as a novel bioabsorbable adhesion‐prevention membrane, the water structure, surfac…
An air microplasma jet (air µ-PJ) was generated at the tip of a stainless steel surgical needle with outer diameters of 0.4–0.7 mm at air flow rates of 0.3–1.0 l/min and RF (13.56 MHz) powers of 4–14 W, in which the air µ-PJ was operated without generating arc discharge at atmospheric pressure. The needle acts as both…