Materials Literature
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Adsorbate binding energy and adsorption capacity of xenon on carbon nanohorns, A J Zambano, S Talapatra, K Lafdi, M T Aziz, W McMillin, G Shaughnessy, A D Migone, M Yudasaka, S Iijima, F Kokai, K Takahashi
X-ray diffraction (XRD) methods and differential scanning calorimeter (DSC) thermal analysis have been used to investigate the structural changes of polyamide 6 (PA 6)/clay and polyamide 6,6 (PA 6,6)/clay nanocomposites. Polyamide 6/clay was prepared by the intercalation of ε-caprolactam and exfoliation of the layered…
In this study the tensile and the dynamic-mechanical behavior of injection-molded samples of various soy protein thermoplastic compounds were evaluated as a function of the amount of glycerol, type and amount of ceramic reinforcement, and eventual incorporation of coupling agents. The incorporation of glycerol into a…
The synthesis of tetra- p -anisyl- p -phenylenediamine (TAPD, 1 ) and its derivatives containing appended diarylamino (AA) redox groups (2AA/PD, 2 and 4AA/1PD, 3 ) is presented. Such mixed redox arrays are of interest in a materials context for their projected directional electron transport properties and potential ch…
Abstract We have discovered that pentamethylcyclopentasiloxane (D 5 H) can be readily polymerized into poly(pentmethylcyclopentasiloxane) (PD 5 ) with a Pt (Karstedt) catalyst in the presence of water in bulk or in solution at 100 °C and that the product is a solid with extraordinary properties. The polymerization sta…
A series of novel regenerated cellulose (RC) films was prepared from cotton linters in 6 wt% NaOH/4 wt% urea aqueous solution by coagulating with 1–20 wt% sulfuric acid (H2SO4) aqueous for 1–20 min. Dependences of structure, morphology, light transmittance, mechanical properties, and water permeability of the films on…
Abstract In the cast film process a polymer melt is extruded through a slit die, stretched in air, and cooled on a chill roll. During the path in air the melt cools while being stretched. Film casting experiments were carried out with an isotactic polypropylene resin. The temperature and width distributions were measu…
This paper examines the catalytic function of the protein YbgC, encoded by the ybgC gene of the tol-pal gene cluster in Haemophilus influenzae. The YbgC protein, a homologue of the Pseudomonas sp. strain CBS3 4-hydroxybenzoyl-coenzyme A thioesterase, conserves the active site Asp residue associated with thioesterase a…
A charge-density study of the nonlinear-optical (NLO) precursor {4-[bis(diethylamino)-methylium] phenyl}dicyanomethanide (DED-TCNQ), space group ${P2}_{1}/c,$ $a=11.174(2)\AA{};$ $b=12.859(2)\AA{};$ $c=12.486(2)\AA{};$ $\ensuremath{\beta}=112.00(1)\ifmmode^\circ\else\textdegree\fi{},$ is presented. The results derive…
We report a comprehensive study on the adsorption of Cl on the clean rutile ${\mathrm{TiO}}_{2}$ (110) $(1\ifmmode\times\else\texttimes\fi{}1)$ surface. STM and photoemission spectroscopy results are compared to ab initio results. At room temperature, Cl adsorbs dissociatively and binds to the fivefold coordinated Ti…
Abstract Fibrous cellulose and maleated polyethylene (FC–MPE) composites were prepared under melt mixing by maleation of polyethylene (PE) to obtain maleic anhydride (MA) grafted PE (MPE) and successive compounding of the resultant MPE with fibrous cellulose (FC). When increasing the content of added MA to 2 wt %, the…
Genetic experiments in bacteria have shown the suf operon is involved in iron homeostasis and the oxidative stress response. The sufB and sufC genes that always occur together in bacteria are also found in plants, and even the malaria parasite, associated with the plastid organelle. Although the suf operon is believed…
The first integrally oxidized metal-free phthalocyanine compounds have been synthesized by chemical oxidation. Phthalocyanine (H(2)(pc), pc = phthalocyaninato) was oxidized with IBr to afford the compounds [H(2)(pc)][IBr(2)] (1) and [H(2)(pc)](2)[IBr(2)]BrAC(10)H(7)Br (2), whose structures were determined by means of…
We studied phase stability, structural properties, and electronic band structures of graphite fluorides ${\mathrm{C}}_{n}\mathrm{F}$ $(n=1,2,\dots{},6)$ using density-functional theory with local density approximation. The calculation shows that ${\mathrm{C}}_{n}\mathrm{F}$ with ${\mathrm{sp}}^{3}$ bonding has a direc…
The solid−liquid equilibrium (SLE) has been measured from 270 K to the melting temperature of the solid for eight binary mixtures of imidazoles (1 H -imidazole, 2-methyl-1 H -imidazole, 1,2-dimethylimidazole, benzimidazole, and 2-methylbenzimidazole) with either octan-1-ol or water using a dynamic method. The melting…
The $\mathrm{Pd}/\ensuremath{\alpha}\ensuremath{-}{\mathrm{Al}}_{2}{\mathrm{O}}_{3}(0001)$ interface at low Pd coverage has been studied by a variety of theoretical methods and models at this metal-oxide interface. All results are consistent and predict a noticeable interaction dominated by the metal polarization in r…
After an overview of the nature of molecular crystals, this review examines the techniques for the derivation of non-quantum chemical computational models of intermolecular interactions, the experimental data useful for calibration, the structural features of molecular crystals and their determination, and finally the…
Abstract The improvement of oxygen‐barrier properties of glassy polyesters by orientation was examined. Poly(ethylene terephthalate) (PET), poly(ethylene naphthalate), and a copolymer based on PET in which 55 mol % of the terephthalate was replaced with bibenzoate (PET‐BB55) were oriented by constrained uniaxial stret…
Abstract The synthesis and characterization of novel polymerized high internal‐phase emulsions (polyHIPE) materials are described. Homogeneous, highly porous, low‐density, open‐cell crosslinked copolymers were prepared by polymerizing the continuous phase of HIPE containing styrene and varying amounts of 2‐ethylhexyl…
We propose a simple model of charge transport that predicts the conducting properties of disordered materials. The transport of charge is assumed to occur by trapping and detrapping of electrons in localized states and diffusion via a conduction-band level. The input is an arbitrary density of localized states (DOLS)…