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。
The thermomechanical behavior of single-walled carbon nanotubes (SWCNTs) is governed by the competition between quasistatic thermal expansion and dynamic thermal vibration, while the vibration effect is more prominent and induces apparent contraction in both radial and axial directions. We perform extensive molecular-…
Abstract A new polythiourethane thermosetting system based on a diisocyanate and a trithiol was studied. After characterization of the reactive species, two critical temperatures, namely T g∞ (maximum glass transition temperature of the thermosetting system) and gel T g ( T g of the material at the gel point), were de…
Abstract The sorption of arabinoxylan (AX) on bacterial cellulose was investigated by adding AX to the culture medium of Gluconacetobacter xylinus . The starting AX material was produced by alkaline extraction of oat spelts. To investigate the impact of varying AX quality, the residual lignin was reduced by ClO 2 blea…
The scope of this article is to study the sulphur vulcanisation of natural rubber in the presence as accelerator of N cyclohexyl 2 benzothiazyl sulfenamide (CBS). Two series of compounds were prepared with conventional and efficient cured systems. Experimental results indicates that abstraction of allylic hydrogen and…
We report the synthesis of highly crystallized multiwalled carbon nanotubes through a modified Wolff-Kishner reduction process at a low temperature of 180 degrees C without adding the conventional catalysts of Fe/Co/Ni into the reaction vessel. The as-synthesized carbon nanotubes are about 10-40 nm in diameter and sev…
High resolution X-ray structure analyses and electronic structure calculation revealed the condition for the charge ordering(CO) observed in the (TMTTF) 2 X (Fabre) salts. The phase diagram of the electronic states including 2k F and 4k F CO has been proposed associated with magnitudes of molecular dimerization and te…
Calculations on the hydrates, dimer, and trimer of phosphoric acid were carried out in an effort to obtain a viable model of the phosphorus NMR chemical shielding in 85% phosphoric acid solution. The theoretical approaches used the gauge-including-atomic-orbital (GIAO) 6-311+G(nd,p) basis set at both scaled density fu…
The deposition of diamond-like carbon (DLC) films at atmospheric pressure is a promising technique of achieving in-process coatings regardless of work size. In this study, we aimed at the synthesis of DLC films at atmospheric pressure by nanopulse chemical vapor deposition (CVD) using a unique power source system cons…
Measurements were made at the Advanced Photon Source at Argonne National Laboratory on the diffraction efficiency and diffraction bandwidth of a thermal-gradient crystal (Si) and a composition-gradient crystal (Si-Ge) to which a thermal gradient was applied. Gradient crystals are crystals in which the spacing between…
Purpose Aims to study the behaviour of four polycrystalline carbon steels in basic pitting solutions. Design/methodology/approach Electrochemical investigations were carried out on four steels: Fe.06C, Fe.18C, Fe.22C and Fe.43C. The analysis was made using an X‐ray fluorescence apparatus. The performance indicator was…
Heterogeneous nucleation refers to precipitation on the surface of nucleating agents such as seed crystals, whereas homogeneous nucleation is precipitation in the absence of available nucleating surfaces. Unlike homogeneous nucleation, heterogeneous nucleation lowers the free energy of crystallization in precipitative…
A ferromagnetic shape memory alloy of Ni48Mn30Ga22 prepared by induction melting was successfully hot forged. Strong textures and a large anisotropy of in plane plastic flow were developed during the hot forging process. The crystal structures, both in austenitic and martensitic states, were investigated by means of n…
The present study reports static and impact mechanical properties of jute fibre-based thermosetting composites using woven and flat braided jute fabrics. Tensile, three-point flexural and low-to-medium energy drop-weight impact tests were conducted and mechanical properties were evaluated to study their dependence upo…
Abstract X-ray diffractograms of tris(bicyclo[2.1.1]hexeno)benzene, crystallized at the interface between a benzene solution and a layer of acetonitrile, show hexagonal symmetry and streaks of diffuse scattering along c *. The heavily faulted layer stacking is analyzed qualitatively and quantitatively in terms of a sy…
A sol of amorphous aluminum orthophosphate (AlPO 4 ) nano particles (30–100 nm) was synthesized by co‐precipitation of Al 3+ and HPO 4 2− with urea at 95°C. A narrow particle size distribution was achieved when [Al 3+ ]≤0.1 M . The isoelectric point of the synthesized powder is pH∼4.7. Alumina/mullite fibers (Nextel™…
The controlled production of arrays of nanowires exhibiting outstanding characteristics is recently attracting much interest owing to their applications in a number of emerging technologies related with multifunctional biosensor applications, controlled optomagnetic response, magnetic storage, magnetotransport, or cat…
Three-dimensional steady and oscillatory flows are simulated in a vertical cylinder partially heated from the side. The vertical wall is heated in a zone at midheight and is insulated above and below this middle zone, while both ends of the cylinder are cooled. The cylinder aspect ratio (A=height∕radius) ranges from 2…
A two-dimensional-corrugated-slab-waveguide add/drop filter providing 100% resonant reflection at 1.55 microm wavelength for both TE and TM polarizations with identical FWHM is designed. The fabricated device exhibits a reflectivity spectrum of more than 95% peak reflection for both polarizations at 1.537 microm. The…
Os objetivos deste trabalho foram desenvolver filmes à base de pectina de baixo teor de esterificação, amidada, com adição dos ácidos graxos láurico (AL), palmítico (AP) e esteárico (AE) e caracterizá-los quanto às propriedades de permeabilidade ao vapor de água (PVA) e ao oxigênio, propriedades mecânicas (tensão de r…
XPS measurements of poly(ethylene oxide) recorded with a SSX-100 spectrometer in standardized experimental conditions are presented: survey scan, high resolution core level spectra as well as the energy loss regions of carbon and oxygen peaks are analyzed. This is part of a contract work aiming to record spectra in th…