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。
We have investigated the magnetic and elastic properties of rare-earth monopnictide TbSb by means of specific heat, high-field magnetization, and ultrasonic measurements. A pronounced anomaly was observed in the specific heat and elastic constants at an antiferromagnetic transition of ${T}_{N}=15.5\mathrm{K}.$ A prono…
Abstract Thermal degradation and kinetics of polyethersulfone (PES) chips were studied in air, nitrogen, helium, and argon from room temperature to 790°C by high‐resolution thermogravimetry (TG) at a variable heating rate in response to changes in the sample's degradation rate. In the four atmospheres, a two‐step degr…
Abstract In this article, a study of the aging of conducting Polyaniline–Polystyrene blends using X‐ray photoelectron spectroscopy (XPS) and UV‐visible‐near IR analysis is presented. The physicochemical results are compared to those obtained by electrical measurements. XPS results confirm the existence of an oxidation…
Abstract Self‐crosslinking acrylate latices containing fluorine were prepared by the batch method, with N ‐hydroxymethyl acrylamide (NMA) as a crosslinking agent. The structure and component of latex polymers were studied by FTIR, ion‐selective electrode analysis, and DSC. The stabilities of latices, such as storage s…
Abstract The dynamic crystallization and subsequent melting behaviour of poly(aryl ether ether ketone), PEEK, and its blends with a thermotropic liquid crystalline polymer, Vectra ® , have been studied using differential scanning calorimetry, optical microscopy and wide‐angle and small‐angle X‐ray diffraction (WAXS an…
Abstract Poly(ether urethane)s (PEUs) are widely used as blood‐contact biomaterials because of their good biocompatibility and mechanical properties. Nevertheless, their blood compatibility is still not adequate for more demanding applications. Surface modification is an effective way to improve blood compatibility an…
A spin-coating process was developed for the preparation of self-supporting ultrathin films of titania. First, an ultrathin layer of poly(vinyl alcohol) (PVA) was formed by spin coating on the surface of an ethanol-soluble polymer that had been preformed on the surface of a Si wafer as a polymer underlayer. Titanium t…
Abstract The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylati…
Infrared spectroscopy is used to study the doping and temperature dependence of the intragap absorption in the ferromagnetic semiconductor ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As},$ from a paramagnetic, $x=0.017$ sample to a heavily doped, $x=0.079$ sample. Transmission and reflectance measurement…
Abstract Poly(lactic acid) (PLA) and starch are both biodegradable and renewable polymers derived from agricultural feedstock. A previous study showed that a small amount (0.5%) of methylenediphenyl diisocyanate (MDI) could enhance the mechanical properties of starch and PLA blends by improving the interfacial interac…
Metal-catalyzed coupling methodologies have been employed in the synthesis of the key building block 3'-formyl-2,2':5',2"-terthiophene. Wittig olefinations with this aldehyde have produced five novel beta-styryl-substituted terthiophene monomers. These materials have been fully characterized by NMR spectroscopy, micro…
Abstract Blend films of poly(ε‐caprolactone) (PCL) with chitin and chitosan were prepared as completely biodegradable polyester/polysaccharide composites. Differential scanning calorimetry and Fourier‐transform infrared (FTIR) spectroscopy revealed that the crystallization of PCL, which had been suppressed by blending…
Abstract A series of bioplastics from isolated soy protein (SPI) and chitin (CH) was prepared with glycerol as a plasticizer by blending and compression molding. Their morphology and properties were investigated by wide‐angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC), dynamical mechanical therm…
Abstract A new type of synthetic pathway—the use of interpenetrating polymer networks (IPNs)—is proposed to design conducting polymer‐based actuators. Two types of materials with interesting conducting properties were prepared: (1) a semi‐IPN between poly(3,4‐ethylenedioxythiophene) (PEDOT) and branched poly(ethylene…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTα-Cyclodextrin-Enhanced Crystallization of Poly(3-hydroxybutyrate)Yong He and Yoshio InoueView Author Information Department of Biomolecular Engineering, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8501, Japan Cite this: Biomacromolecules 2003, 4, 6,…
Evidence is presented here that cupric ions play a part in the natural spinning of Bombyx mori silk. Proton induced X-ray emission studies revealed that the copper content increased from the posterior part to the anterior part of silk gland, and then further increased in the silk fiber. Spectrophotometric analysis dem…
Abstract The use of untreated sawdust as a filler in poly(vinyl chloride) (PVC) was examined—the effects of sawdust content on structural and thermal changes, and rheological and mechanical properties being of main interest. The results revealed that the torque and die entrance pressure drop values during mixing were…
Abstract Several modified poly(vinyl alcohol) (PVA) systems with various plasticizers were prepared and their melt‐processing was successfully realized. This paper focuses on the study of the evaporation behaviour of water in these modified PVA systems, exploring its plasticizing mechanism by using differential scanni…
Mechanical properties of polyelectrolyte multilayer thin films were studied by nanoindentation experiments using an atomic force microscope. We obtained force−distance measurements for a model polycation/polyanion multilayer system, poly(allylamine hydrochloride) (PAH), and an azobenzene-containing polyelectrolyte (P-…
Fed up with cleaning dusty windows, soiled shoes, and dirty paintwork? A series of products are now emerging on the market that claim to have self-cleaning surfaces, apparently removing the need for regular washing, scrubbing, and polishing with chemical agents. But consumers should refrain from throwing away all thei…