Materials Literature
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Polyacrylamide/MWNTs nanocomposite is prepared using MWNTs functionalized with carboxylic acid or carboxylic anion groups. The modified MWNTs show significantly improved colloidal stability without aggregation in aqueous acrylamide solution. The solution was in-situ polymerized to give a well-dispersed PAAm/MWNTs nano…
This study reports an extensive kinetic investigation of the CO + N 2 O reaction which is a major reaction involved with automotive exhaust catalysts during the overall reduction of NO, particularly during the start of a cold engine. Steady-state rate measurements were performed between 217 and 250 °C on Pt−Rh/γ-Al 2…
Abstract The linear‐hyperbranched block copolymers, in which the linear polytetrahydrofuran (PTHF) is linked to the apex of hyperbranched poly(phenylene sulfide) (HPPS‐SH), have been synthesized, and the synthesis includes condensation polymerization of 2,4‐dichlorobenzenethiol, subsequent transformation of the result…
We investigate the thermal conduction properties of a one-dimensional lattice of atoms carrying classical spins and coupled vibrationally. The spin degrees of freedom interact via a classical Heisenberg interaction, while the vibrational degrees of freedom are coupled through nearest-neighbor linear as well as nonline…
The structural and magnetic properties of tetragonal $R{\mathrm{Fe}}_{x}{\mathrm{Mn}}_{12\ensuremath{-}x}$ ($R=\mathrm{Gd}$, Tb, Dy) compounds have been extensively studied by means of dc and ac susceptibilities, x-ray absorption spectroscopy at $\mathrm{Gd}\text{\ensuremath{-}}{L}_{III}$ edge, and neutron-powder-diff…
Abstract A microemulsion polymerization for the synthesis of poly(3,4‐ethylenedioxythiophene) (PEDOT) nanoparticles is described. Spherical and electrically conducting PEDOT particles with diameters as small as 27 ± 8 nm were obtained by using decyltrimethylammonium bromide as a cationic surfactant. PEDOT nanoparticle…
Abstract Poly( ε ‐caprolactone) (PCL)/montmorillonite (MMT) nanocomposites were prepared by in situ ring‐opening polymerization of ε ‐caprolactone in the presence of MMT modified by hydroxyl‐group containing alkylammonium cation (Cloisite®30B) in a single mode microwave oven. For the polymerization mixtures, plateaus…
Abstract A melt compounding process was used to prepare hybrid nanocomposites based on natural rubber (NR) and montmorillonite (MMT) modified with octadecylamine. Cured rubber was subjected to complex testing. Most likely modified MMT participates in physical networking of a low‐temperature topological region (soft am…
Abstract We propose a Galerkin finite element method for numerically modeling the process of heat and moisture transfer in porous clothing assemblies, which takes into account radiative heat transfer and sorption of water vapor into the fibers of the medium. We prove an optimal‐order error estimate for the finite elem…
Differential growth: The growth of crystals of α-resorcinol (see picture; C gray, H white, O red) from the vapor phase is asymmetric along the polar axis. By means of molecular-dynamics simulations, the slower growth at the (011) polar surface is traced back to conformational change of the molecule and to surface reco…
This investigation describes an optically transparent antistatic film composed of antimony-doped tin oxide (ATO) nanoparticles dispersed in a polymer matrix, with remarkably improved electrical and optical properties. The film is fabricated on the basis of a synergistic interaction between self-assembling nanoparticle…
The absorption and emission electronic and vibrational Raman spectra of a series of tetrathiafulvalene compounds have been recorded, assigned with the guide of density functional theory calculations, and interpreted according to their chemical nature of the introduced modifications of the tetrathiafulvalene unit. It t…
Double-hydrophilic block copolymer (DHBC)-directed mineralization is investigated by dissipative particle dynamics (DPD) simulation. By mineralization, we refer to the formation of inorganic crystals from the solution. In the current study, the DHBCs are modeled as chains of A and B blocks with repulsion between unlik…
We study bulk and interfacial properties of a model suspension of hard colloidal platelets with continuous orientations and vanishing thickness using both density functional theory, based on either a second virial approach or fundamental measure theory (FMT), and Monte Carlo (MC) simulations. We calculate the bulk equ…
A series of polyphenylene dendrimers (PDs) incorporating additional pentafluorophenyl units have been synthesized. A key building block thereby is the tetrakis(pentafluorophenyl)cyclopentadienone, which serves as the end-capper for making the outer shells of the dendrimers. The variation of the peripheral pentafluorop…
We present the 2D self-assembly properties of an amyloid-like peptide (LSFDNSGAITIG-NH2) (i.e., LSFD) over a whole range of spatial scales. This peptide is known to adopt an amyloid-like behavior in water where it aggregates into fibrils. Monolayers of this 12 amino acid peptide were built by direct spreading and comp…
Abstract We present structure analysis techniques for nanoparticles, which use the explicit simulation of the nanoparticle structure. Data are based on X‐ray powder data, which are interpreted via the Debye equation and pair distribution function data. The techniques allow the exact determination of the nanoparticle s…
We calculate, employing the classical theory of nucleation and growth, the effective diffusion coefficients controlling crystal nucleation of nanosize clusters and the subsequent growth of micron-size crystals at very deep undercoolings, below and above Tg, using experimental nucleation and growth data obtained for st…
Eine ganze Familie: Organophosphonatkomplexe des Vanadiums in hoher Oxidationsstufe sind verbreitet, ihre VIII-Analoga sind dagegen äußerst dünn gesäht. Aus VCl3 und Phosphonaten entsteht unter Solvothermalbedingungen eine ganze Familie entsprechender Vanadium(III)-phosphonate, darunter der schichtförmige Cluster {VII…
Abstract Quiescent melt crystallization rates of various polyolefins including high density polyethylene (PE), isotactic form of polypropylene (PP), polybutene‐1 (PB1), and poly(4‐methyl pentene‐1) (P4MP1) were investigated under both isothermal and nonisothermal conditions using differential scanning calorimetry (DSC…