Materials Literature
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Abstract Free radical solution copolymerization of acrylonitrile (AN) and itaconic acid (IA) was performed with DMSO‐d 6 as the solvent and 2,2′‐azobisisobutyronitrile (AIBN) as the initiator. Weight ratio of the monomers to solvent and molar ratio of initiator to monomers were constant in all experiments. The initial…
We present a combined experimental and simulation study of the charging of the spherical gold samples by an electron beam in a $0.15--10\phantom{\rule{0.3em}{0ex}}\mathrm{keV}$ range of beam energies. Experiments on grains with diameters of the order of ${10}^{\ensuremath{-}6}\phantom{\rule{0.3em}{0ex}}\mathrm{m}$ sho…
Abstract Wide bandgap diluted magnetic semiconductors (DMS) have been of interest recently due to theoretical predictions of room temperature ferromagnetism in these materials. However, the mechanism of the observed ferromagnetism of the nitrde‐based DMS is still controversial, and may originate from a carrier‐mediate…
Abstract The scope of this study is to continue our earlier studies on the peroxide curing of diene elastomers. The effect of peroxide content and temperature on the curing and mechanical properties of NBR and H‐NBR rubbers with different acrilonitrile content was evaluated. Experimental evidence indicates that satura…
There is an increasing need to develop new biomaterials as tissue engineering scaffolds. Unfortunately, many of the materials that have been studied for these purposes are polyesters that hydrolytically degrade into acidic products, which may harm the surrounding tissue, and lead to accelerated degradation of the biom…
Abstract Liquid fraction profiles of a column of draining aqueous foam stabilized with sodium dodecyl sulfate were studied by nuclear magnetic resonance imaging (NMRI) at high spatial and temporal resolution. It was observed that the liquid holdup in the column is not locally homogeneous in the direction of the column…
The influence of flexibility on the phase behavior of bent core biaxial nematic liquid crystals is investigated using Monte Carlo simulation. A generic model for rigid V-shaped molecules is extended to include a bending potential, which allows us to investigate the relationship between the flexibility of a bent core m…
A thermoelastic constitutive model for shape memory alloy (SMA) actuators embedded in a composite structure, termed an SMA hybrid composite (SMAHC), was recently implemented in the commercial finite element codes MSC.Nastran and ABAQUS. The model can be easily implemented in any code that has the capability for analys…
Here, we described the in vitro biocompatibility of a novel nanostructured surface composed of PTFE as a potential polymer for the prevention of adverse host reactions to implanted devices. The foreign body response is characterized at the tissue-material interface by several layers of macrophages and large multinucle…
High Resolution Image Download MS PowerPoint Slide Amorphous carbon nanotube brushes were prepared by a simple method using glucose as the carbon precursor. The functional surfaces of these nanotubes were covered with gallium ions and then calcined to get gallium oxide nanotube brushes. The gallium oxide nanotube brus…
Ambiguities present in space-group construction from the Hermann-Mauguin (H-M) symbols enforce the use of other space-group designations or H-M symbol modifications. Therefore, a transformational space-group symbol (TSG) composed of the well defined standard space-group identifier, an axis-system transformation and or…
In Vitro and in Vivo Antilithiasic Effect of Saponin Rich Fraction Isolated From Herniaria hirsuta Descritores: Nefrolitiase. Oxalato de calcio. Cristalizacao. Herniaria hirsuta. Saponinas. Efeito Anti-litiasico, In vitro e In Vivo, da Fracao Rica em Saponinas Extraida da Herniaria hirsuta
Abstract This paper deals with the evaluation of the sorption‐induced release of an antimicrobial component, i.e., isopropanol, from two ethylene‐vinyl alcohol (EVOH) copolymers as measured by ATR‐FTIR spectroscopy. Three different swelling agents were considered namely, water, methanol, and ethanol, whose kinetics of…
Abstract The influence of annealing conditions on the fracture behavior of poly(propylene‐ block ‐ethylene) sheets was investigated by means of the essential work of fracture method, and was complemented by the study of the effect of annealing on crystal structure, using differential scanning calorimetry. It was shown…
Dimethyl-3,3a,3b,4,6a,7a-hexahydro-3,4,7-metheno-7H-cyclopenta[a]pentalene-7,8-dicarboxylate (3, a 9,10-dihydrofulvalene pincer cycloadduct) was found to be a versatile building block for the synthesis of polynorbornyl scaffolds containing various end functionalities such as porphyrins, pyrimidine, and the phenanthrol…
Abstract Nanocomposites of bentonite with polyaniline (PANI), poly(methacrylic acid) (PMAA), and poly(aniline‐ co ‐methacrylic acid) (PANI‐ co ‐PMAA) were prepared by in situ intercalative polymerization technique. The nanocomposites were characterized by FTIR and UV–visible spectroscopies, XRD, SEM, TEM, as well as T…
Abstract The row‐nucleated lamellar crystalline structure of high‐density polyethylene (HDPE) films was prepared by applying elongation stress to HDPE melt during T‐die cast film extrusion and subsequently annealing the extruded films. This unusual crystalline structure was analyzed in terms of lamellar crystalline or…
Abstract Structure and mechanical properties for binary blends composed of a poly(3‐hydroxybutyrate) (PHB) and a cellulose derivative, such as cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB), have been studied by means of dynamic mechanical analysis, isothermal crystallization measurements, and…
Abstract The isothermal crystallization and crystal morphology of poly(trimethylene terephthalate) (PTT)/poly (ethylene 2,6‐naphthalate) (PEN) blends were investigated with differential scanning calorimetry and polarized optical microscopy. The commonly used Avrami equation was used to fit the primary stage of isother…
The term macroemulsion is sometimes employed to distinguish the ordinary emulsions defined from microemulsions, nanoemulsions, and micellar systems. Emulsion formulations can be used orally, parenterally, ophthalmically, or topically, and they can be used by respiratory route. Nanoemulsions contain oil phases, surfact…