Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The applicability of the proton conductor Ba(Zr0.1Ce0.7Y0.2)O3–δ (BZCY7) as an electrolyte material for solid-oxide fuel cells (SOFCs) is investigated. The electrolyte material exhibits ionic conductivities (see figure) among the highest known for electrolytes viable for SOFC applications, and the chemical and thermal…
Abstract Polyaniline was synthesized in the presence of tanninsulfonic acid to yield a product tanninsulfonic acid‐doped polyaniline (TANI‐PANI) that is water‐dispersible. Several samples ranging from 0 to 70% tanninsulfonate (TS) were prepared. These samples were then evaluated for differences in dispersibility, part…
The crystal structure of the title compound, copper(II) diselenium(IV) pentoxide [Meunier, Svensson & Carpy, (1976). Acta Cryst. B32, 2664–2667], has been reinvestigated and confirmed to much higher precision, and anisotropic displacement parameters has been refined. The structure consists of CuO4 planar squares and S…
The synthesis of dendritic polymers, i.e., dendrimers (ideally branched) and hyperbranched polymers (non-ideally \nbranched) and investigation of their properties have gained large scientific attention over the last twenty years [1]. \nDendrimers are difficult and expensive to synthesize, while hyperbranched (…
The crystallographic structure of ${\mathrm{U}}_{4}{\mathrm{O}}_{9\ensuremath{-}y}$ crystals can be described in terms of a spatial arrangement of special aggregates of oxygen atoms distributed throughout the basic fluorite framework of ${\mathrm{UO}}_{2}$. The structure of ${\mathrm{U}}_{4}{\mathrm{O}}_{9\ensuremath{…
Abstract A novel superabsorbent composite, polyacrylamide/attapulgite, from acrylamide (AM) and attapulgite (APT), was prepared by free‐radical polymerization, using N,N′ ‐methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate (APS) as an initiator. The effects of hydrochloric acid (HCl) concentration,…
Abstract The major objective in this study was the preparation of polyacrylonitrile (PAN) nanofibers composed of 1,4‐bis( o ‐cyanostyryl)benzene (ER) and 1‐( o ‐cyanostyryl)‐4‐( p ‐cyanostyryl)benzene (EB), two kinds of fluorescent whitening agents widely used in the textile industry. The scanning electron microscopy…
Mesostructured carbon materials were obtained by nanocasting MCM-48 and SBA-15 ordered mesoporous silica templates via two carbon infiltration routes: a liquid-phase process (LPI) using sucrose solution or a gas-phase chemical vapor infiltration (CVI) process using propene. The structural characteristics of the carbon…
Dielectric measurements under steady shear flow are made to clarify the shear induced structural changes in the nematic (N) and the smectic-A (SA) phases of 4-n-octyl-4'-cyanobiphenyl (8CB). In the N phase, the temperature dependence of the dielectric permittivity shows a characteristic behavior, which can be consiste…
Abstract The purpose of this work was to study how mineral fillers would behave in a polypropylene (PP) matrix when PP modified with maleic anhydride (MA) and/or itaconic acid (IA) was used as a coupling agent in the preparation of mineral‐filled PP composites. The composites were characterized with tensile mechanical…
We report on theoretical results concerning the relation between the liquid-liquid transition and the density anomaly for a family of ramp potentials (hard-core plus linear short range repulsion and linear long range attraction). Using first order perturbation, we have studied the influence of the range of the attract…
New picket porphyrins delivering at least one carboxylic group around the coordination site of the macrocycle were synthesized for bismuth coordination. The influence of the number, the length, and the pre-organization of the carboxylic acid pickets on the stability of the bismuth complexes was explored. Their stabili…
We have investigated by extended x-ray absorption fine structure spectroscopy the local order around Er atoms introduced by ion implantation in substoichiometric silica films prepared by plasma enhanced chemical vapor deposition, where Si nanoclusters have been formed by different preimplantation annealing processes.…
Hierarchical porous/hollow tin oxide nanostructures mediated by polypeptide: surface modification, characterization, formation mechanism and gas-sensing properties, Zhu, Jie, Tan, O K, Lee, Y C, Zhang, T S, Tay, B Y, Ma, J
A new strategy was developed for in situ formation of polyethylene nanocomposites, in which synthetic laponite clay was first modified by octaaminopropyl polyhedral oligometric silsesquioxane (OapPOSS) and then used to support a nickel α-diimine late-transition-metal catalyst for ethylene polymerization. The resulting…
We investigate the dependence of the stickiness parameters tij=1/(12tauij)--where the tauij are the conventional Baxter parameters--on the solute diameters sigmai and sigmaj in multicomponent sticky hard sphere (SHS) models for fluid mixtures of mesoscopic neutral particles. A variety of simple but realistic interacti…
Abstract Cationic dyeable poly(trimethylene terephthalate) (CD‐PTT) and metallocene isotactic polypropylene (m‐iPP) polymers were extruded (in proportions of 75/25, 50/50, and 25/75) from two melt twin‐screw extruders to prepare three CD‐PTT/m‐iPP conjugated filaments of the island–sea type. This study investigated th…
Abstract Ozone cracking and flex cracking of crosslinked elastomer blends of brominated isobutylene/ para ‐methylstyrene copolymer (BIMSM) and unsaturated elastomers, such as polybutadiene rubber (BR) and natural rubber (NR), are studied. This saturated BIMSM elastomer, which is a terpolymer of isobutylene, para ‐brom…
Abstract The hydroxy methyl groups were introduced onto the pristine carbon black surface through the reaction between unsaturated hydrogen atoms of the polycondensed aromatic rings of carbon black and formaldehyde in alkali condition. Using the resultant hydroxy methyl groups on the carbon black surface as the growth…
Abstract A linear aniline‐formaldehyde resin (AF) complexed with different acids was successfully synthesized with the traditional way of polymerizing a novolac‐type phenolic resin. When the AF(DBSA) 1.0 (AF complexed with only HDBSA ( n ‐dodecyl benzene sulfonic acid)) was blended with PANI(DBSA) 0.5 (polyaniline dop…