Materials Literature
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Abstract In the present work, statistical (EOCs) and block (OBCs) ethylene‐octene copolymers, with similar densities and crystallinities, were used as impact modifiers of isotactic polypropylene (iPP), and the toughening effects of these two types of elastomers were compared. The viscosity curves of EOCs were similar…
Abstract A highly novel nano‐CaCO 3 supported β‐nucleating agent was employed to prepare β‐nucleated isotactic polypropylene (iPP) blend with polyamide (PA) 66, β‐nucleated iPP/PA66 blend, as well as its compatibilized version with maleic anhydride grafted PP (PP‐ g ‐MA), maleic anhydride grafted polyethylene‐octene (…
An elegant and facile route for the preparation of polymer/silver nanocomposites for polymers having solubility in organic solvents has been developed. Aqueous colloidal solution of nano-silver has been used as the source of nano-silver particles. Nano-silver particles were transferred to the poly(methyl acrylate) (PM…
Shining star: Star-shaped hexakis(oligothienylethynyl)benzene with C6 symmetry shows solvatochromic fluorescence with a marked redshift in emission. Furthermore, the star-shaped molecule shows a fairly large two-photon absorption property. Interestingly, the molecule forms fluorescent fibrous materials from hexane, DM…
A survey of recent studies of biaxial liquid crystals (LCs), whose nematic and/or smectic-A phases do not possess optical uniaxiality (viz., more than one optical axis exists), is given in this review. In particular, we emphasize on how Nuclear Magnetic Resonance (NMR) spectroscopy can help to advance the understandin…
Binary naoparticles composed of a superparamagnetic Fe(3)O(4) core and an Au nanoshell were prepared via a high-temperature hydrolysis reaction followed by seed-mediated growth. The nanoprobes render simultaneous dual functions of both fast magnetic response and local surface plasmon resonance. Using these nanoprobes,…
Abstract To analyze the specific roles of anthraquinone‐2‐sulfonate (AQS) and polypyrrole (PPy) layer on oxygen reduction reaction (ORR), the electrocatalytic reduction of oxygen was investigated on the AQS/PPy composite modified graphite electrode. Results show that the enhanced electrocatalytic performance is attrib…
Introduction Classification of brackish waters Brackish waters comprise a range of exclusive habitats that can be subdivided into three major categories: transition zones between freshwater and marine habitats, transition zones between hyperhaline water and marine habitats, and inland waters without marine water excha…
Abstract Multi‐walled carbon nanotubes (MWCNTs) are modified by polycarbosilane derived SiC to improve the dispersion of MWCNTs in the polymer matrix. Unmodified and modified MWCNTs are dispersed in PEI/hydroxyl terminated PDMS(HTSR) blend by melt mixing. TEM and FESEM images shows better dispersion of SiC coated MWCN…
The FT-IR and FT-Raman spectra of 1,3-diphenyl thiourea were recorded and analyzed. The vibrational wavenumbers were examined theoretically with the aid of the Gaussian03 package of programs using the HF/6-311++G(d,p) and B3LYP/6-311++G(d,p) levels of theory. The data obtained from vibrational wavenumber calculations…
Isotactic propylene−1-octene (iPPC8) and propylene−1-octadecene (iPPC18) copolymers have been synthesized with a highly isospecific C 2 -symmetric metallocene catalyst. iPPC8 copolymers crystallize in the α form of iPP for octene concentration up to 12−13 mol %, whereas iPPC18 copolymers crystallize in the α form for…
Novel two-dimensional heterometallic Fe(II)-M(Ni(II), Pd(II), Pt(II), Ag(I), and Au(I)) cyanide-bridged metalorganic frameworks exhibiting spin-crossover and liquid crystal properties, formulated as {FeL(2)[M(I/II)(CN)(x)](y)}·sH(2)O, where L are the ligands 4-(4-alkoxyphenyl)pyridine, 4-(3,4-dialkoxyphenyl)pyridine,…
An order−order phase transition of chiral block copolymers (BCPs*) from single helix to double gyroid (H* → G) through a nucleation and growth process was demonstrated. The H* and G phases can be obtained by solution casting from fast and slow solvent evaporation, respectively, suggesting that the H* phase is a metast…
Plasmonischer Photokatalysator: Durch Verankern des Farbstoffs [Ru(bpy)3]2+ (bpy=2,2′-Bipyridin) an der Oberfläche von Ag-Nanopartikeln, die mit einer dünnen SiO2-Schicht überzogen sind (siehe Bild), wurde ein Photokatalysator erhalten, dessen Phosphoreszenzemission und photoinduzierte Oxidationsaktivität in der selek…
Introduction Although studied less than aquatic diatoms, aerial diatoms are discussed in an extensive literature. Most publications on the topic consist merely of floristic lists. Thus, our understanding of aerial diatom ecology is meager. Given the brevity of the current chapter, it is not possible to list all of the…
We report the investigation on the adsorption behaviors of CO on the rutile TiO 2 (110)-1 × 1 surface with preadsorbed O adatoms using scanning tunneling microscopy (STM) joint with density functional theory (DFT) calculations. The STM experimental results show that the diffusive CO molecules tend to adsorb at the sit…
The distribution of thiols in mixed SAMs can be determined in a straightforward manner from spectrophotometric titrations using a fluorescent probe. A plot of saturation concentration as a function of mole fraction provides information on the number of headgroups involved in binding.
A novel amphiphilic four-armed [poly(ε-benzyloxycarbonyl-L-lysine)]₂-block-poly(ethylene glycol)-block-[poly(ε-benzyloxycarbonyl-L-lysine)]₂ hybrid copolymer has been prepared. The cytotoxicity study shows that the copolymer has good biocompatibility with no obvious inhibition effect on cell growth. The amphiphilic co…
Thermoplastic natural rubber hybrid composites reinforced with kenaf and short glass fibers were compounded by melt blending method using an internal mixer, Thermo Haake 600P. Thermoplastic natural rubbers (TPNR) were prepared from polypropylene (PP), natural rubber (NR) and liquid natural rubber (TPNR) with ratio 70:…
The hydrogen desorption kinetics of composite materials made of magnesium hydride with transition metal additives (TM: Nb, Fe, and Zr) was studied by several experimental techniques showing that (i) a few TM at.% concentrations catalyse the H 2 desorption process, (ii) the H 2 desorption kinetics results stabilized af…