Materials Literature
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Monodisperse silica particles (SiPs) of diameter between 100 and 1500 nm were surface-modified in a mixture of ethanol/water/ammonia with a newly designed triethoxysilane having an atom transfer radical polymerization (ATRP) initiating site, (2-bromo-2-methyl)propionyloxyhexyltriethoxysilane. The surface-initiated ATR…
ADVERTISEMENT RETURN TO ISSUEPREVAddition/CorrectionCrystallization in the Thin and Ultrathin Films of Poly(ethylene-vinyl acetate) and Linear Low-Density PolyethyleneS. Ge, M. Rafailovich*, J. Sokolov, Y. Zou, H. Ade, J. Lüning, A. Lustiger, and G. MaromCite this: Macromolecules 2005, 38, 5, 2022Publication Date (Web…
In this paper, polystyrene (PS)/poly(cis‐butadiene) rubber (PcBR) blends were prepared by melt blending. Polystyrene‐graft‐maleic anhydride (PS‐g‐MAH) and linear epoxy polybutadiene (LEPB) were added to the blends to increase the compatibility. The blends were shown to be semimiscible by small‐angle X‐ray scattering (…
Blends between high‐molecular weight poly(ϵ‐caprolactone) (PCL) and an intercalated nanocomposite of poly(ϵ‐caprolactone)‐organophilic montmorillonite (OMONT), containing 30% by weight of the nanofiller (NPCL30) have been investigated. Such blends have been shown to have much improved mechanical properties with respec…
Based on the inverted quasi- ab initio pair potentials, the phase stability and site preference of R 2 Co 17− x Mn x ( R = Nd, Sm, Gd) intermetallics with a rhombohedral Th 2 Zn 17 -type structure are studied. In the calculations, the crystal binding energy of R 2 Co 17− x Mn x decreases with increasing Mn concentrati…
The GaO and GaO2 molecules were investigated using negative ion photoelectron spectroscopy. All the photoelectron spectra showed vibrationally resolved progressions. With the aid of electronic structure calculations and Franck-Condon spectral simulations, different molecular parameters and energetics of GaO-/GaO and G…
In this work, the fluorescence of glutamine-binding protein (GlnBP) and its complex with glutamine (GlnBP/Gln) in native and unfolded forms was studied. The experimental data were interpreted on the basis of the results of the analysis of Trp and Tyr microenvironments taking into the account the data for GlnBP mutated…
UPPS (undecaprenyl pyrophosphate synthase) catalyses consecutive condensation reactions of FPP (farnesyl pyrophosphate) with eight isopentenyl pyrophosphates to generate C55 UPP, which serves as a lipid carrier for bacterial peptidoglycan biosynthesis. We reported the co-crystal structure of Escherichia coli UPPS in c…
A series of hyperbranched poly[3-ethyl-3-(hydroxymethyl)oxetane] samples with various degrees of branching (DB) were adopted to investigate the relationship between crystallinity and DB. The relative degree of crystallization (DC) and DB were determined by x-ray diffraction (XRD) and 13 C nuclear magnetic resonance (…
This paper studies the nonisothermal crystallization kinetics of polypropylene (PP) and polypropylene/organic‐attapulgite (PP/org‐ATP) nanocomposites by differential scanning calorimetry (DSC) at various cooling rates. Several different analysis methods were used to describe the process of nonisothermal crystallizatio…
The reaction of cis-Ru(acac)2(CH3CN)2 (acac = acetylacetonate) with 2,2'-dipyridylamine (L) in ethanolic medium resulted in facile one-pot synthesis of stable [(acac)2RuIII(L)]ClO4 ([1]ClO4), trans-[(acac)2RuII(L)2] (2), trans-[(acac)2RuIII)L)2]ClO4 ([2]ClO4), and cis-[(acac)2RuII(L)2] (3). The bivalent congener 1 was…
Low-density porous tin dioxide (∼0.5 g/cm 3 ) was prepared from a SnCl 4 /ethanol/H 2 O mixture and polystyrene (PS) template. Such a low density made the as-synthesized tin dioxide act as a promising target material for laser-induced extreme ultraviolet (EUV) emission. The resulting structure of the as-synthesized ti…
The synthesis, characteristics, and properties of amphipatic, water-soluble dendrigrafts, with a polystyrene core and polystyrene-b-poly(methyl vinyl ether) (PS-b-PMVE) diblock as external branches, are described. The dendrigrafts are observed by AFM and TEM as egglike or long cylindrical objects which can self-organi…
We have investigated holographic recordings in azobenzene-containing amorphous polymers (AP) and polymer-dissolved liquid-crystalline composites (PDLCC) with two waves that have orthogonal linear polarizations. Only linear photobirefringence was induced in AP, while both linear and circular photobirefringences were in…
Abstract A series of poly(ether imide)s (PEIs), III a–k , with light color and good physical properties were prepared from 1,4‐bis(3,4‐dicarboxypheoxy)‐2,5‐di‐ tert ‐butylbenzene dianhydride ( I ) with various aromatic diamines ( II a–k ) via a conventional two‐stage procedure that included a ring‐opening polyaddition…
Oriented fibers of atactic Polyacrylonitrile (PAN) show a diffraction pattern consisting of just two equatorial peaks. The plot of d‐spacing vs. temperature shows a linear increase up to about 85–100°C, followed by another linear region with augmented slope. This increase in slope occurs at a temperature that coincide…
Stable poly(MMA-co-DVB) microspheres were prepared by precipitation polymerization using acetonitrile as the main medium under various polymerization conditions including monomer and initiator concentrations.
The magnetic behavior of nanocrystalline copper spinel ferrites CuxFe3−xO4 (0.42⩽x⩽1) exhibiting different degrees of crystallinity, have been investigated by means of in-field Mössbauer and dc magnetic measurements. The samples were obtained by a coprecipitation method and were subsequently high-energy ball milled fo…
We have investigated the electronic structure of polycrystalline ${\mathrm{Ca}}_{2}\mathrm{Fe}\mathrm{Re}{\mathrm{O}}_{6}$ using photoemission spectroscopy and band-structure calculations within the local-density $\text{approximation}+U$ $(\mathrm{LDA}+U)$ scheme. In valence-band photoemission spectra, a double-peak s…
We herein report the synthesis of organic−inorganic hybrid poly(methyl methacrylate) containing polyhedral oligosilsesquioxanes. Octakis(3-hydroxypropyldimethylsiloxy)octasilsesquioxane (OHPS) was synthesized from octakis(hydridodimethylsiloxy)octasilsesquioxane [Si 8 O 12 (OSiMe 2 H) 8, Q 8 M 8 H ] following literatu…