Materials Literature
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Abstract The soy polyols were prepared from epoxidation of soybean oil followed by ring opening of oxirane obtained by using methanol as the ring opener. Polyols of hydroxyl (OH) numbers ranging from 128 to 174 mg of KOH/g were obtained by the variation of epoxidation time of soybean oil. A novel cast polyurethane res…
Abstract Die Reduktion einer Organocobaltvorstufe auf CdSe‐Nanostäben ergibt zwei unterschiedliche Halbleiter‐Magnet‐Heterostrukturen (siehe Bild). Selektives Aufwachsen von Co an den Spitzen der CdSe‐Stäbe resultiert zunächst in Nanokügelchen‐Nanostab‐Strukturen, die sich dann in Nanostab‐Nanostab‐Strukturen umwandel…
Transport and infrared properties of SmFeAs(O1−xFx): from SDW to superconducting ordering, Tropeano, M, Fanciulli, C, Ferdeghini, C, Marrè, D, Siri, A S, Putti, M, Martinelli, A, Ferretti, M, Palenzona, A, Cimberle, M R, Mirri, C, Lupi, S, Sopracase, R, Calvani, P, Perucchi, A
Abstract Nanomodification of poly‐hydroxy‐butyrate (PHB), with hyperbranched polymers (HBP), was studied. Solid‐hyperbranched polyesters of different generations were incorporated into a biobased and biodegradable, thermoplastic, polyester. Thermal, rheological, and molecular weight measurements had indicated that due…
Abstract The use of a high temperature–high pressure near critical solvent is an interesting alternative to dissolve high‐molecular‐weight polyolefins with alkanes. This characteristic allows their separation from the blends with other polymers. In the present work, the polymer dissolution of commercial polypropylene…
Abstract Unsaturated polyesters (UPE) were chain extended with three different epoxy group containing compounds. The molecular weight increase was monitored using gel permeation chromatography (GPC). The polymers obtained were characterized by FTIR and 1 H NMR, and styrene solubility and gel time. The polyesters were…
Abstract Log P , solvent‐accessible surface area (SASA), total energy, bond length, and bond strain of the most favorable H‐bond formed between drug and receptor; and quantum chemical descriptor Δ E ‐based quantitative structure–activity relationship (QSAR) study of tetrahydroimidazodiazepinone derivatives have been d…
A magnetic and electric transport study of twinned and untwinned ${\text{La}}_{1\ensuremath{-}x}{\text{Sr}}_{x}{\text{MnO}}_{3}$ single crystals, with Sr content corresponding to a vertical phase diagram boundary $(x\ensuremath{\approx}0.1)$, is presented. The phases distinctive of both phase diagram sides are consecu…
Abstract A curable low‐molecular‐weight poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) was prepared by the redistribution of regular PPO with maleic anhydride (MA) in toluene, using benzoyl peroxide as an initiator. The redistributed PPO (MA‐PPO), which contained alkene groups, was characterized by proton nuclear magnet…
We investigate the topological effect of charge density wave (CDW). We found a ``beat'' Shapiro step structure in ${\text{NbSe}}_{3}$ topological (ring) crystals. We interpreted it as an evidence of the circulating CDW current that flows in the rings and modifies the CDW fundamental frequency, namely, narrow-band-nois…
Abstract A novel porphyrin complex that contains an Fe porphyrin linked to a tridentate ligand where a Cu ion could be coordinated was synthesized. The molecule also incorporated a tyrosine mimic attached to the porphyrin ring via a urea bond and was fully characterized. We studied the action of dioxygen on several po…
Abstract Since dendritic polymers have excellent characteristic physical properties such as low viscosity, good solubility, and many functional groups, compared with corresponding linear polymers, they have been of great interest in the field of polymer chemistry. Among them, hyperbranched polymers have great possibil…
Abstract The formation process of ZnO/ZnS core/shell microcomposites and ZnS microspindles prepared by the reaction of ZnO colloids and thioacetamide under hydrothermal conditions was investigated in detail by X‐ray powder diffraction, field emission scanning electron microscopy, transmission electron microscopy and s…
We derive a formal description of local light-ray rotation in terms of complex refractive indices. We show that Fermat's principle holds, and we derive an extended Snell's law. The change in the angle of a light ray with respect to the normal of a refractive index interface is described by the modulus of the refractiv…
Abstract A new conducting blend from natural rubber (NR), low‐density polyethylene (PE), and Bi‐based superconductor (BSCCO) nanoparticles was successfully formulated. Blends were prepared by means of an open two‐roll mill for five ratios (100/0, 90/10, 80/20, 70/30, and 60/40 NR/LDPE). The microstructures of the blen…
ZnO nanocrystals were grown onto PS nanospheres by ALD under extra-low-temperature conditions. Hydrophobic nature of PS and shadowing effects coming from colloidal assembly allowed us to control both concentration and spatial distribution of the ZnO nanocrystals. The resulting ZnO/PS nanocomposites showed enhanced abs…
Abstract This review describes a novel approach for the syntheses of various carbides of silicon, tungsten, and molybdenum at a relatively low temperature by using the RAPET (Reactions under Autogenic Pressure at Elevated Temperature) process. The solvent‐, template‐free and straightforward RAPET process was used to s…
Abstract Radiation grafting of acrylic acid onto poly(ethylene terephthalate) (PET) knittings was investigated by preirradiation technique. The influence of the grafting conditions, such as reaction time, ferrous sulfate concentration, preirradiation dose, organic additives, monomer concentration, and reaction tempera…
Abstract In this article, a Molecular Structural Mechanics/Finite Element (MSM/FE) multiscale modeling of carbon nanotube/polymer composites with viscoelastic (VE) polymer matrix is introduced. The nanotube is modeled at the atomistic scale using structural molecular mechanics. The matrix deformation is analyzed by no…
Firm evidence of the biaxial nematic phase in liquid crystals, not induced by a magnetic or electric field, has been established only recently. The discovery of these biaxially anisotropic liquid crystals has opened up new areas of both fundamental and applied research. The advances in biaxial liquid-crystal-related t…