Materials Literature
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Abstract In this study, rubbery, bio‐based thermoset polymers were synthesized from soybean oil (SO) and p ‐dinitrosobenzene (DNB) via an ene reaction. Polymeric p ‐dinitrosobenzene (PDNB) was synthesized from p ‐quinone dioxime and was thermally depolymerized in the presence of SO. SO/PDNB polymers were synthesized b…
The structures and energies of selected (CX) n ( n = even, 6−60, X = F or H) polyhedra, computed at the B3LYP/6-311++G(d,p)//B3LYP/6-31G(d,p) level, show (CH) n isomers to be generally less strained than the corresponding (CF) n analogues. For n = 6−24, both (CH) n and (CF) n favor the same geometric patterns. The tub…
We present a noncontact, accurate, and efficient methodology for determination of elastic constants in two-dimensional colloidal crystals via the calculation of the local strain fluctuation of particles. The hexagonally close-packed colloidal crystals form from microsized particles subjected to an alternating electric…
Abstract To improve the interaction between syndiotactic polypropylene (SPP) and fibrous cellulose (FC), the effects of the addition of maleated polypropylene (MAPP) and FC surface modification with 3‐aminopropyltriethoxysilane (APTES) on SPP/FC composites were studied with respect to the morphology and the tensile pr…
Abstract A new method for coating glass slides with ZnO particles with an average size of 200 nm is proposed in the current article. The coating was performed under microwave radiation. Two main morphologies are found for the ZnO crystals that are deposited on glass slides. The first morphology is that of a very dense…
Diesel engine emissions for on-road, stationary and marine applications are regulated in the United States via standards set by the Environmental Protection Agency (EPA). A major component of diesel exhaust that is difficult to reduce is nitrogen oxides (NOx). Selective catalytic reduction (SCR) has been in use for ma…
Abstract This study examined the film characteristics of an anodized AZ91D magnesium alloy by varying the direct current and pulse frequency conditions. In order to evaluate the effect of the pulse frequency on film formation, anodic oxidation was carried out by applying direct current and pulse current at a current d…
Silicon oxycarbide is a versatile material system that is attractive for many applications because of its ability to tune properties such as chemical compatibility, refractive index, electrical conductivity, and optical band gap through changes in composition. One particularly intriguing application lies in the produc…
The pentapeptide-repeat protein EfsQnr from Enterococcus faecalis protects DNA gyrase from inhibition by fluoroquinolones. EfsQnr was cloned and purified to homogeneity, but failed to produce diffraction-quality crystals in initial crystallization screens. Treatment of EfsQnr with glutaraldehyde and the strong reducin…
Comment on ``Theoretical Description of Carrier\nMediated Magnetism in Cobalt Doped ZnO??\nIn this Comment, we question the electron-mediated\nmechanism for magnetic coupling in Co-doped ZnO re-\ncently proposed by Walsh, Da Silva, and Wei [\n1\n]. Such a\nmechanism is based on density functional theory (DFT)\ncalcula…
We present systematic investigations of buckling in Langmuir monolayers of polyvinyl acetate formed at the air-water interface. On compression the polymer monolayers are converted to a continuous membrane with a thickness of approximately 2-3 nm of well-defined periodicity, lambdab. Above a certain surface concentrati…
The coupled wave theory dealing with optics of discontinuous two-dimensional (2D) periodic structures is reformulated by using Fourier factorization with complex polarization bases, which is a generalized implementation of the fast Fourier factorization rules. The modified approach yields considerably improved converg…
In this study, traditional hydrothermal sealing (HTS) treatment was for the first time employed to arc sprayed pure aluminium coatings, and proves to be a successful sealing method. Corrosion performances were examined in salt solution immersion test (SSIT) and electrochemical polarisation measurements. The HTS coatin…
Mixing effects have been investigated from molecular dynamics simulations at constant number of particles, volume, and temperature on the Kob-Andersen glass-forming Lennard-Jones atomic mixture A(x)B(1-x) for 0 < or = x < or = 1 compositions. Upon cooling, crystallization is observed for x < or = 0.5 and x > or = 0.9…
We address the issue of the validity of the fluctuation dissipation theorem and the time evolution of viscoelastic properties during ageing of aqueous suspensions of a clay (Laponite RD) in a colloidal glass phase. Given the conflicting results reported in the literature for different experimental techniques, our goal…
The area under the glow curve (no thermal quenching and constant dose) is conserved only in TL–time plots and is not conserved in TL–temperature plots, but for a given heating rate, the glow peak height is same in time as well as in temperature plots and the glow peak height increases with increasing heating rate. How…
Abstract The blend of polypropylene (PP) and atactic polystyrene (PS) hybrid with nano‐ceria (CeO 2 ) was prepared for fine dyeable fiber. Nano‐CeO 2 modified with stearic acid was in situ added to PS by radical suspension polymerization. The dispersion of hy‐PS with nano‐CeO 2 in the PP crystals was investigated. The…
Abstract Polybutadiene (BR) and styrene–butadiene (SBR) rubbers containing the same loading of precipitated silica nanofiller were prepared. The silica surfaces were pretreated with bis(3‐triethoxysilylpropyl) tetrasulfide to chemically bond the silica to the rubber. The rubber compounds were mixed together for differ…
We present computer simulations of the Gay-Berne model with a strong terminal dipole. We report the existence of different stable antiferroelectric interdigitated bilayered phases in this model with diverse in-plane organization. The occurrence of these phases depends crucially on the value of the molecular elongation…
Abstract Monomeric Schiff base derived from salicylaldehyde and 1,3‐diaminopropane was subjected to polycondensation reaction with formaldehyde and piperazine in basic medium. The resin was found to form polychelates readily with Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) metal ions. The materials were characterized b…