Materials Literature
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We study magneto-elastic effects in crystals of magnetic molecules. Coupled equations of motion for spins and sound are derived and the possibility of strong resonant magnetoacoustic coupling is demonstrated. Dispersion laws for interacting linear sound and spin excitations are obtained for bulk and surface acoustic w…
Biodegradable nanogels loaded with rhodamine B isothiocyanate-dextran (RITC-Dx) as a model for water-soluble biomacromolecular drugs were prepared using atom-transfer radical polymerization (ATRP) in a cyclohexane inverse miniemulsion in the presence of a disulfide-functionalized dimethacrylate cross linker. UV-vis sp…
In recent years, carbon nanotubes have been utilized for a variety of applications, including nanoelectronics and various types of sensors. In particular, researchers have sought to take advantage of the superior electrical properties of carbon nanotubes for fabricating novel strain sensors. This article presents a si…
Defect accumulation is the principal factor leading to the swelling and embrittlement of materials during irradiation. It is commonly assumed that, once defect clusters nucleate, their structure remains essentially constant while they grow in size. Here, we describe a new mechanism, discovered during accelerated molec…
Hydration of the <1 μm size fraction of a high-charge montmorillonite (Clay Minerals Society Source Clay SAz-1), and of low- and high-charge beidellites (Source Clays SbId-1 and SbCa-1, respectively) was studied by modeling of X-ray diffraction patterns recorded under controlled relative humidity (RH) for Sr- and/o…
Highly ordered mesoporous carbon−titania nanocomposites with nanocrystal-glass frameworks have been synthesized via the organic−inorganic−amphiphilic coassembly followed by the in situ crystallization technology. A soluble resol polymer was used as a carbon precursor, prehydrolyzed TiCl 4 as an inorganic precursor, an…
The existence of systematic variations of isobaric fragility in different supercooled Lennard-Jones binary mixtures is revealed by molecular dynamics simulations. The connection between fragility and local structures in the bulk is analyzed by means of a Voronoi construction. It is found that clusters of particles bel…
The structure of materials.- Elasticity.- Plasticity and failure.- Notches.- Fracture mechanics.- Mechanical behaviour of metals.- Mechanical behaviour of ceramics.- Mechanical behaviour of polymers.- Mechanical behaviour of fibre reinforced composites.- Fatigue.- Creep.- Exercises.- Solutions.
Starre Drahtnetze: Konjugierte mikroporöse Polymernetzwerke sind durch Sonogashira-Hagihara-Kupplung zugänglich. Obwohl diese Materialien amorph sind, können Mikroporen- und Oberflächengröße über die Länge der Phenylenethinylen-Streben eingestellt werden (siehe Bild; das Netzwerk ist blau dargestellt, und ein 1,3,5-su…
A series of nine, frustrated, multidomain peptides is described in which forces favoring self-assembly into a nanofiber versus those favoring disassembly could be easily modified. The peptides are organized into an ABA block motif in which the central B block is composed of alternating hydrophilic and hydrophobic amin…
Rigid wiry nets: Conjugated microporous polymer networks are formed by Sonogashira–Hagihara coupling. Although these materials are amorphous, the micropore size and surface area can be controlled by varying the length of the phenyleneethynylene struts (see picture; the network is shown in blue, and one 1,3,5-substitut…
Abstract Fourier transform infrared (FTIR) spectroscopy, optical microscopy (OM), and differential scanning calorimetry (DSC) techniques were used to probe phase behavior and interactions in blends of poly(vinylidene fluoride) (PVDF) and polyesters [poly(trimethylene adipate) (PTA) and poly(pentamethylene adipate) (PP…
We have conducted highP-Tsynchrotron X-ray and time-of-flight neutron diffraction experiments as well as indentation measurements to study equation of state, constitutive properties, and hardness of nanocrystalline and bulk nickel. Our lattice volume-pressure data present a clear evidence of elastic softening in nanoc…
Abstract The morphology and mechanical properties of a styrene–ethylene/butylene–styrene triblock copolymer (SEBS) incorporated with high‐density polyethylene (HDPE) particles were investigated. The impact strength and tensile strength of the SEBS matrix obviously increased after the incorporation of the HDPE particle…
Abstract In relation to the bulk high‐impact polystyrene process, this work investigates the partition between phases of styrene and an initiator: tert‐ butyl peroctoate. A Flory‐Huggins model was applied for predicting the phase separation point and the partitions of styrene and tert‐ butyl peroctoate. For blends of…
Abstract Epoxycyclohexyl polyhedral oligomeric silsesquioxane (epoxy–POSS) was used to prepare a chain‐extended poly(butylene terephthalate) (PBT) with a twin‐screw extruder. The effect of epoxy–POSS on the melt flow index, mechanical properties, rheological behavior, and thermal properties of chain‐extended PBT was i…
New, non-discoid M(II) complexes [MCl2(L)] {M = Mn, Zn; L = 2,6-diformyl-4-methylphenolbis[3′,4′,5′-tris(hexadecyloxy)phenylimine]} have been prepared and shown to exhibit columnar mesophases, the nature of which was found to be metal-dependent. As analysed by DSC and small-angle X-ray diffraction experiments, the com…
AbstractObjective:To report a case in which the anticoagulation effect of warfarin appeared to have been potentiated by chitosan, probably due to interference with the absorption of vitamin K.Case Summary:An 83-year-old male with hypertensive cardiovascular disease, type 2 diabetes mellitus, and chronic atrial fibrill…
Abstract In this study, montmorillonite (MMT)/poly(ϵ‐caprolactone)‐based polyurethane cationomer (MMT/PCL‐PUC) nanocomposites were prepared and their mechanical properties, thermal stability, and biodegradability were investigated. PCL‐PUC has 3 mol % of quaternary ammonium groups in the main chain. The MMT was succes…
Abstract Ethynedithiol‐based polyeneoligosulfides have been synthesized in 96% yield by the reaction of sodium acetylides (HCCNa, NaCCSNa) and elemental sulfur through the NaC sp bond in liquid ammonia with the following spontaneous polymerization of ethynedithiols (HSCCSH) formed by the hydrolysis. The polyeneoli…