Materials Literature
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Abstract A series of new aromatic polyamides containing cinnamide pendent units were prepared from 2′‐(cinnamide)ethyl‐3,5‐diaminobenzoate and various aromatic dicarboxylic acids by the direct polycondensation reaction, with triphenyl phosphite and pyridine as condensing agents. The polyamides were characterized by 1…
Abstract Dendrimers are globular, hyperbranched polymers possessing a high concentration of surface functional groups and internal cavities. These unique features make them good host molecules for small ligands. To reveal relationships between dendrimer size and its encapsulating properties, the interactions of the fo…
Abstract Adhesion properties between a polycarbonate (PC)/acrylonitrile‐butadiene‐styrene blend substrate and PC films of various thicknesses, bonded through film insert molding, were investigated. The use of various molecular weights of PC and incorporation of PC‐oligomer in the blend substrate has been found to seve…
Abstract Polyamidoamine (PAMAM) dendrimers were investigated as curing agents in bisphenol A epoxy resin systems. The cure behavior of epoxy resin/PAMAM at varying components was investigated by a dynamic torsional vibration method (DTVM); the thermal behavior of the materials was characterized by means of thermogravi…
Heat capacity measurements have been made on a liquid-crystal mixture system formed from bent-shaped molecule 1,3-phenylene bis[4-(4-8-alkoxyphenyliminomethyl)benzoates] (P-8-O-PIMB) and rod-shaped molecule n-pentyl-cyanobiphenyl (5CB). The obtained results can be understood assuming that the addition of P-8-O-PIMB mo…
We propose an adaptation of the osmotic stress technique for determining equations of state of colloids covered by polymer films. We describe here the case of silica particles covered by 6 or 7 layers of polyelectrolyte multilayers. The establishment of a pressure-distance curve allows the interpretation of colloidal…
We report the synthesis and magnetic characterization of metal/metal oxide one-dimensional heterostructures with a radial geometry---coaxial nanocables. High-density arrays of cobalt and magnetite- $({\mathrm{Fe}}_{3}{\mathrm{O}}_{4})$ based nanocables with the diameter of $\ensuremath{\sim}100\phantom{\rule{0.3em}{0e…
Abstract Strongly adherent poly(aniline‐ co ‐ o ‐toluidine) coatings were synthesized on low‐carbon‐steel substrates by the electrochemical copolymerization of aniline with o ‐toluidine with sodium tartrate as the supporting electrolyte. These coatings were characterized with cyclic voltammetry, ultraviolet–visible ab…
Synchrotron radiation XPS measurements of Ir 4f, N 1s and I 4d core levels for the compounds Ir(cod)(N-N)X (cod=1,5-cyclooctadiene; N-N=1,10-phenanthroline and substituted derivatives; X=Cl, I) are reported. The compounds Ir(cod)(3,4,7,8-Me4phen)X (3,4,7,8-Me4phen=3,4,7,8-tetramethyl-1,10-phenanthroline) were structur…
Photoinduced structural changes in molecular semicrystalline ${\mathrm{As}}_{4}{\mathrm{Se}}_{3}$ films have been characterized by extended x-ray absorption fine structure and x-ray diffraction under in situ band-gap laser illumination. Transient and permanent changes in the local and long-range structure have been de…
Abstract The morphology formation in the blends comprising a high density polyethylene (HDPE) and selected ethylene/1‐octene copolymers (EOCs) was studied with variation of blend compositions using atomic force microscopy (AFM). The binary HDPE/EOC blends studied showed well phase‐separated structures (macrophase sepa…
Abstract The effect of oleyl amine on processing and physical properties of SBR compounds filled with silane–silica particles has been evaluated. Two different types of silane molecules have been used as coupling agents to minimize the silica–silica interactions and reduce the formation of secondary structures of sili…
Abstract Submicrometer fibers based on the microbially synthesized ultra‐high‐molecular‐weight poly(3‐hydroxybutyrate) (PHB) were generated by an electrospinning (ES) process with chloroform as the solvent. To characterize the resulting electrospun fibers in comparison with the pure PHB before ES, differential scannin…
Abstract This study aims at exploring the effect of a commercial organoclay montmorillonite (MMT) on the final properties of syndiotactic polystyrene (sPS) injection‐molded samples. To this goal, injection‐molded specimens made from neat sPS and commercial MMT modified with various organic compounds were prepared in d…
Abstract Polymeric complex layers are deposited onto polypropylene and polyester nonwoven fabrics via the layer by layer method. It is found that grafting after previous surface activation with an aqueous ammonium persulfate solution is a beneficial method to form the first acidic layer. In order to form polymer compl…
Abstract Conducting polyaniline (PAni)/activated carbon (AC) nanocomposites were synthesized by the in situ chemical polymerization method. The resultant shell–core PAni–AC nanocomposites were characterized by elemental analysis, Fourier transform infrared, scanning electron microscopy, thermal gravimetric analysis, X…
Abstract An organic salt (FeAOT) is synthesized by the reaction of sodium 1,4‐bis(2‐ethylhexyl)sulfosuccinate (AOT) and ferric chloride. It is fabricated into fibers by manual drawing and electrospinning. Long polypyrrole (PPy) fibers are obtained for the first time by a vapor deposition reaction of pyrrole on the FeA…
$\mathrm{B}2\phantom{\rule{0.3em}{0ex}}\mathrm{FeCo}$ has the highest saturation magnetization of any material, but has zero room temperature ductility in the ordered state that somewhat increases in the disordered state. Brittleness of $\mathrm{FeCo}$ has long been a puzzle given its high-symmetry $\mathrm{B}2$ struc…
In this article, we use animal G-protein alpha subunit family as an example to illustrate a comprehensive analytical pipeline for detecting different types of functional divergence of protein families, which is phylogeny-dependent, combined with ancestral sequence inference and available protein structure information.…
Abstract In this work, the morphology was studied in ternary composites of polypropylene (PP) with nanosized calcium carbonate (nano‐CaCO 3 ) fillers and elastomer inclusions and the thermodynamic consideration was used to analyze the formation of phase structure of the composites. The wetting coefficient (ω a ), inte…