Materials Literature
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The standard Caspar & Klug classification of icosahedral viruses by means of triangulation numbers and the more recent novel characterization of Twarock leading to a Penrose-like tessellation of the capsid of viruses not obeying the Caspar-Klug rules can be obtained as a special case in a new approach to the morpholog…
Abstract The porphyrin‐catalyzed, template‐guided polymerization of aniline was carried out in an aqueous buffer solution. Hydrogen peroxide and iron(III) tetrasulfonated tetraphenyl porphyrin catalyzed the polymerization of aniline in the presence of sulfonated polystyrene as a template. The polymerization was carrie…
High birefringence and low viscosity isothiocyanates liquid crystal single compounds and eutectic mixtures, based solely on laterally fluorinated aromatic rigid core structures, are reported. Extraordinarily high values of figure-of-merit were observed at room temperature and also elevated temperatures for the nematic…
Abstract This article reports a comparative study of polypropylene (PP) nanocomposites synthesized with nanosilica (NS) and diglycidyl ether of bisphenol A, an epoxy‐resin‐grafted nanosilica (ENS), as nanofillers. These nanocomposites were prepared with the melt‐mixing method at a constant loading level of 2.5 wt %; t…
Abstract An array of polyhedral oligomeric silsesquioxane (POSS) compounds, including metal, methacrylate, and amine functional POSS, and POSS copolymers were incorporated into aromatic and aliphatic dental resins. Heptaphenyl‐propylamine POSS and methacrylate derivatives were synthesized by corner‐capping and Michael…
Configurationally locked polyene crystals grown in the absence and in the presence of their tailor-made auxiliaries, which are slightly modified substrate molecules, were investigated. The effects of the tailor-made auxiliaries on the crystal characteristics were investigated by X-ray crystal structure analysis and no…
Abstract The transitions and reactions involved in the thermal processing of binary mixtures of polyethylene and poly(ethylene‐ co ‐vinyl acetate) copolymers with different concentrations of a foaming agent (azodicarbonamide) were studied using differential scanning calorimetry (DSC). The effect of ZnO as a kicker als…
Abstract In this study, a polymerizable UV‐stabilizer, 2‐hydroxy‐4‐(3‐methacryloxy‐2‐hydroxylpropoxy)benzophenone (BPMA), was synthesized using 2,4‐dihydroxybenzophenone (UV‐0) and glycidyl methacrylate (GMA). It was copolymerized with methyl methacrylate (MMA) to prepare poly(MMA‐ co ‐BPMA) by emulsion polymerization…
Abstract This pioneering study reported about the film‐forming properties of high‐molecular‐weight chitosan as followed in situ by attenuated total reflection Fourier transform infrared (ATR‐FTIR) spectroscopy, and has implications in fields such as biomedical, pharmaceutical, packaging, and coating applications. From…
Abstract The article addresses the issue of recycling of poly(ethylene terephtalate) (PET) by melt blending with polycarbonate (PC). PET/PC blends containing various amounts of the immiscible polymers were prepared in a twin‐screw extruder. Selected compositions were also prepared in the presence of an Sn‐based cataly…
We report a route for synthesizing patterned carbon nanotube (CNT) catalysts through the microcontact printing of iron-loaded poly(styrene-block-acrylic acid) (PS-b-PAA) micellar solutions onto silicon wafers coated with thin aluminum oxide (Al(2)O(3)) layers. The amphiphilic block copolymer, PS-b-PAA, forms spherical…
Abstract Hydrophobic polymers such as polyethylene and polypropylene are very difficult to use for preparing nanocomposites without a compatibilizer. However, in this study, polybutadiene rubber (BR; a hydrophobic polymer) nanocomposites were produced successfully without a compatibilizer with a melt‐compounding metho…
Abstract Homo metal cluster containing seven Zn atoms was efficiently synthesized in high yield via a template effect of a trisaloph ligand and characterized by NMR, MS, X-ray crystallography, etc. The homo cluster can be converted quantitatively to Zn3·La hetero metal cluster.
Two cyano-bridged Cu(II)-M(V) [M = Mo (2), W (3)] complexes formed by self-assembly of octacyanometalates [M(CN)8]3- (M = Mo, W) with a new molecular precursor [Cu(L2)]2+ (1) (L2 = a macrocyclic ligand) in a 2:3 ratio have been investigated in terms of structures and magnetic behaviors. The M2Cu3 repeating unit of bot…
Abstract A new phosphorous‐containing fatty acid diepoxide was obtained from 10‐undecenoyl chloride and 10‐(2′,5′‐dihydroxyphenyl)‐9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide and crosslinked with 4,4′‐diaminodiphenylmethane and bis( m ‐aminophenyl)methylphosphine oxide. The properties of the thermosetting mater…
Abstract The polarized infrared (IR) spectroscopy technique was used to evaluate the surface uniaxial molecular orientation of films of poly(ethylene terephthalate) (PET), two thermotropic liquid crystalline polymers (LCPs), Vectra®A950 and Rodrun®LC5000, and their blends obtained by extrusion. The molecular orientati…
Molecular orientation distributions in the crystalline and amorphous regions of a biaxially oriented poly(L-lactic acid) film were analyzed fully by polarized Raman spectroscopy. Raman bands at 926 and 875 cm(-1) were chosen for the determination of the most probable molecular orientation distribution functions for th…
Abstract When the flax fibers (machine tow) were treated with KMnO 4 solution, MnO 2 was deposited over‐all the fiber surface. The amount of MnO 2 deposited relied on the KMnO 4 concentration. Subjecting the flax‐containing MnO 2 to a solution consisting of monomer (acrylic acid, AA) and citric acid, CA (or any acid u…
Abstract Anhydrous europium(III) acetate, Eu(OAc) 3 ( 1 ), its sesquihydrate Eu(OAc) 3 (H 2 O) 1.5 = [Eu 2 (OAc) 6 (H 2 O)](H 2 O) 2 ( 2 ) and the “hydrogendiacetate” [Eu(H(OAc) 2 ) 3 ](H 2 O) = [Eu 2 (OAc) 6 (HOAc) 2 (H 2 O) 2 ](HOAc) 4 ( 3 ) were obtained as colourless single crystals by direct oxidation of europium…
Abstract The melting and crystallization behaviors of isotactic polypropylene (PP)/acrylonitrile–butadiene rubber (NBR) blends were investigated with differential scanning calorimetry. The samples were scanned at a heating rate of 20°C/min in a nitrogen atmosphere. The effects of blend ratio, compatibilizer, and fille…