Materials Literature
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Americanae nace como un proyecto conjunto que surge dentro de la Red Europea de Información y Documentación sobre América Latina (REDIAL), y que ha afrontado la Biblioteca de la Agencia Española de Cooperación Internacional para el Desarrollo (AECID). Esta nueva biblioteca virtual hace más accesibles los libros digita…
This chapter summarizes the preparations, characterizations, and potential applications of novel thermosetting biopolymers from soybean and other natural oils. Three different approaches, i.e. cationic, thermal, and 1741_C23.qxd 1/6/2005 2:08 PM Page 727
Composites have encompassed almost all material domains (house furnishing, packaging, car, aerospace, transportation, sport, leisure, and so on). All synthetic polymers (thermoplastics, thermosets, and elastomers) can be used as matrices. As fillers, besides inorganic powders, extensive use has been made of inorganic…
We report a molecular dynamics study of a simple model system that has the static properties of an ideal gas, yet exhibits nontrivial "glassy" dynamics behavior at high densities. The constituent molecules of this system are constructs of three infinitely thin hard rods of length L, rigidly joined at their midpoints.…
Urethane-amide dendrons of up to the third generation were synthesized via a convergent route. These dendrons were coupled with MeO-PEG (Mn = 2000), and the micellar characteristics of dendron-PEG conjugates in water were investigated. The conjugates with the second or third generation dendron (PEG-2GOc and PEG-30c) f…
Abstract The synthesis of low‐molecular‐weight (weight‐average molecular weight < 45,000 g/mol) lactic acid polymers through the dehydropolycondensation of L ‐lactic acid was investigated. Polymerizations were carried out in solution with solvents (xylene, mesitylene, and decalin), without a solvent using different…
A modelling investigation of texture evolution in equal channel angular extrusion (ECAE) of bcc materials with a 90° die via routes A, BA, BC and C is performed using a visco-plastic self-consistent model and assuming idealized simple shear deformation at the intersection plane of the die channels. For each route, the…
The interface-induced gap states (IFIGS) are the fundamental mechanism which determines the band structure lineup at semiconductor interfaces. The valence-band offsets of semiconductor heterostructures are given by the difference of the respective IFIGS branch-point energies and electric-dipole terms which may be omit…
Switching of molecular chirality under photo-irradiation was studied in a cobaloxime complex crystal. Excitation of the d-d transition of the Co(III) ion appeared to be much more effective in inducing the chirality change than excitation of the ligand-metal charge transfer band although the latter is more effective in…
Oxygen hydrogenation at 100 K by gas phase atomic hydrogen on Ni(110) has been studied under ultrahigh vacuum conditions by temperature programmed desorption (TPD) and x-ray photoelectron spectroscopy (XPS). Formation of adsorbed water and hydroxyl species was observed and characterized. The coverage of the reaction p…
Biobased polymers are considered promising candidates for sustainable development because, among other reasons, they contribute to the substitution of renewable resources for depletable petrochemical feedstocks, help to decrease greenhouse gas (GHG) emissions, and, if used in the form of biodegradable polymers, allow…
Heterobinuclear oxometalate anions based upon [CrMoO7]2-, [CrWO7]2-, and [MoWO7]2- were generated and transferred to the gas phase by the electrospray process from acetonitrile solutions containing two of the salts (Bu4N)2[MO4] (M = Cr, Mo, W). Their reactivities were examined and compared with those of the related ho…
When a droplet of fluid is deposited on a surface with chemical and/or topological patterns, its static shape is highly dependent on the 2D distribution of the patterns. In the case of chemical stripes, three distinct spreading regimes have been observed as a function of wettability contrast between the two kind of st…
The selective synthesis of tetracoordinate square-planar low-spin nickel(II)-semiquinonato (Ni(II)-SQ) and nickel(III)-catecholato (Ni(III)-Cat) complexes, 1 and 2, respectively, was achieved by using bidentate ligands with modulated nitrogen-donor ability to the nickel ion. The electronic structures of 1 and 2 were r…
SET–DTLRP of VC initiated with CHI3 and catalyzed by Na2S2O4 in water at 21 °C produces ultrahigh molar mass poly(vinyl chloride) (PVC). These PVCs with Mn of 160,000–200,000 have higher glass transition temperature and thermal stability than the highest molecular weight PVC that is commercially available (Mn = 113,00…
Emission properties of Tm3+ in (0.85−x)(Ge0.25As0.10S0.65)–0.15GaS3∕2–xCsBr glass (x=0–0.17) were investigated. With 15mol% CsBr addition, the emission intensity of 1.48-μm increased accompanied by a large increase in the lifetime of the Tm3+:H43 level up to 1.2ms. At the same time, a 1.48-μm emission peak splits into…
We solve the disordered Holstein model in three dimensions considering the phonon variables to be classical. After mapping out the phases of the "clean" strong coupling problem, we focus on the effect of disorder at strong electron-phonon (EP) coupling. The presence of even weak disorder (i) enormously enhances the re…
This paper describes the production of an adaptive composite by embedding thin pre-strained shape memory alloy actuators into a Kevlar-epoxy host material. In order to combine the activation and sensing capabilities, fibre Bragg grating sensors are also embedded into the specimens, and the strain measured in situ duri…
Abstract Summary: A new approach for the production of macroporous polymer materials is presented. Cross‐linked polystyrene particles are first produced by emulsion polymerization. This latex is then swollen by a further addition of monomer and it is successively destabilized, by addition of salt, in such a way that a…
We have observed coherent optical and acoustic phonon generation, which are strongly coupled to the charge-ordering (CO) transition in (, 0.58) using femtosecond optical pump-probe spectroscopy. Coherent optical phonons, observed at low temperatures, disappear above the charge-ordering temperature , while coherent aco…