Materials Literature
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The structures of four Fe,Mg olivine crystals Fa11.6, Fa22.3, Fa27.6 and Fa27.8 have been investigated by ex situ and in situ experiments using single-crystal X-ray diffractometry. For the ex situ experiments, the crystals were quenched after equilibration at temperatures between 500 °C and 900 °C. Resetting effects w…
Abstract Glycidyl methacrylate (GMA) was grafted onto chlorinated polypropylene (CPP) in the molten state using benzoyl peroxide (BPO) in the presence of styrene (St) as a comonomer. The differential scanning calorimetry (DSC) results indicated that the thermodynamic curve of unpurified grafted CPP was different from…
Abstract Hexaarmed star‐shaped hydroxyl‐terminated poly(ε‐caprolactone) (PCL) was successfully synthesized via the ring‐opening polymerization of ε‐caprolactone (CL) with hexakis[ p ‐(hydroxymethyl)phenoxy]cyclotriphosphazene initiator and stannous octoate catalyst in bulk. The star‐shaped PCL with hydroxy end groups…
Abstract Polystyrene is, after polyolefins, the most widespread polymer in both industry and everyday life, successfully replacing some raw natural materials. In this study, the chemical modification of polystyrenes of different molecular weights was performed with various functional group modifiers (epichlorohydrin,…
A hexaphenylbenzene-based zinc porphyrin dyad forms a 1:1 complex with a fullerene bearing two pyridyl groups via coordination of the pyridyl nitrogens with the zinc atoms. The fullerene is symmetrically located between the two zinc porphyrins. The binding constant for the complex is 7.3 x 10(4) M(-1) in 1,2-difluorob…
Abstract Polystyrene/titanium dioxide (TiO 2 ) composite particles containing organic ultraviolet (UV)‐stabilizer groups were prepared by the emulsion copolymerization of styrene and 2‐hydroxy‐4‐(3‐methacryloxy‐2‐hydroxylpropoxy)benzophenone with sodium sulfopropyl lauryl maleate as a surfactant in the presence of rut…
Abstract The fluorinated copolymer emulsions containing different monomers with the reactive groups were successfully prepared at our lab, using emulsion polymerization technique. The water repellency and the durability for the fabrics treated by fluorinated water repellents after 30 and 50 washes were measured and co…
We present studies of fluorescence intensity modulation in neat films of a photochromic poly( p -phenylenevinylene) (PPV) derivative. Poly(2-hexyloxy-5-((10-(4-(phenylazo)phenoxy)decyl)oxy)-1,4-phenylenevinylene) (HPA-10-PPV), a PPV derivative functionalized with photoaddressable azobenzene side chains, is known to un…
Abstract Sheath‐core bicomponent fibers were prepared by a general melt‐spinning method with polypropylene chips and various particles. The melt‐spun fibers were characterized by DSC and mass specific electrical resistance (MSER) apparatus. The electromagnetic constant was measured using a network analyzer and the abs…
The translational and orientational movement of single terrylenediimide dye molecules incorporated as guests in the nanometer-sized pores of an M41S host silica film is observed simultaneously (see figure). By correlating the dynamics of position and orientation as well as orientation and emission spectra of single mo…
Von Ringen und Stäben: Hybride Gold-Polymer-Kern-Schale-Nanostäbe bilden spontan ringförmige Anordnungen, wenn ein Tropfen ihrer Lösung auf einem Substrat trocknet. Das Verhalten ist hoch reproduzierbar und liefert innerhalb von Sekunden tausende wohldefinierter Ringe aus Nanostäben (siehe TEM-Bild). Untersuchungen er…
Abstract The catalytic dehydrocondensation reaction of α,ω‐bis(trimethylsiloxy)methylhydridesiloxane and of α,ω‐bis(trimethylsiloxy)methylhydridesiloxane‐dimethylsiloxane with α‐hydroxy‐ω‐trimethylsiloxydiorganosilylenes, in the presence of anhydrous caustic potassium, at 1:35 and 1:33 ratio of initial compounds has b…
Abstract Breakup process of polyamide 6 (PA6) in polypropylene (PP) matrix under shear flow was online studied by using a Linkam CSS 450 stage equipped with optical microscopy. Both tip streaming and fracture breakup modes of PA6 droplets were observed in this study. It was reported that the droplet would break up by…
Abstract Hydrosilylation of α,ω‐bis(trimethylsiloxy)methylhydridesiloxane to propargyl alcohol in the presence of catalyst, platinum hydrochloric acid, was performed at several temperatures. Comb‐type methylsiloxane oligomers with substituted reactive groups in the side chain have been obtained. At the high stages of…
Abstract Numerical simulation for the calculation of the profile developments of the spin‐draw process in the melt spinning of poly(ethylene terephthalate) was performed. Both spinning and drawing profiles were analyzed and included the structure development of birefringence and crystallinity in the draw line. By appl…
Abstract Water‐borne polyurethanes based on 4,4‐diphenylmethane diisocyanate, poly(butylene adipate), and chain extender N ‐methyldiethanolamine (MDEA) that provided tertiary amine groups were synthesized. The polyurethane–chitosan (PU/CS) blends can be dissolved in the acetic acid and cast into films. The mechanical…
Diffusion of Si and O ions in simulated liquid SiO 2 under high pressure (or high density) have been studied in a model containing 3000 ions under periodic boundary conditions with pairwise interatomic potentials which have a weak electrostatic interaction and Morse-type short-range interaction. In order to observe di…
Abstract The imidization of poly(styrene‐ co ‐maleic anhydride) (SMA) was conducted, and the glass‐transition temperatures ( T g 's) of the resulting products were measured with differential scanning calorimetry. The contributions from functional groups of maleic anhydride, N ‐phenylmaleamic acid, and N ‐phenylmaleimi…
Abstract Acrylic‐based nanocomposite resins have been investigated in view of future application in water borne automotive coatings by the aid of postemulsification processes. Mechanical, flow and leveling properties of the nanocomposite resins, containing various concentrations of silicate, have been investigated. Th…
The new mineral fluorcalciobritholite, ideally Ca3Ce2(SiO4)2(PO4)F, has been found at Mount Kukisvumchorr, Khibiny alkaline complex, Kola Peninsula, Russia, in veinlets which contains aggregates of orthoclase, nepheline, sodalite and biotite in association with grains of fayalite, gadolinite-(Ce), zircon, monazite-(Ce…