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。
Six packings of symmetry-related cylinders, with cylinder axes in invariant positions (coordinates completely determined by symmetry), are described. Two have axes along <100> and four have axes along <111>. It is shown that there can be no cubic cylinder packing with axes along <110>. Earlier errors concerning the nu…
Two heterophasic reactor-grade propylene–ethylene copolymers (RAHECO®) were diluted with propylene–ethylene random copolymers to obtain materials with constant EPR/PE-particle diameter but various interparticle distances. According to the results of instrumented impact tests, brittle-to-tough transitions were found at…
The ruthenium phthalocyanine molecule has never been isolated as a single unit in the solid phase. Any attempt to obtain it leads to the dimeric form (RuPc)2 with a double bond between Ru–Ru atoms. Owing to the amorphous nature of this compound, its structural characterisation was previously investigated by LAXS (Larg…
Microporous molecular sieves can be synthesized under the high temperatures of 165–180 °C and high pH of 10–12.5, using surfactant cetyltrimethylammonium bromide (CTAB) as a template. It was found that various factors, such as temperature, alkalinity, Si∶Al ratio and the presence of a small amount of organic alkylammo…
Silver physical developers consist of silver ions and a reducing (developing) agent. They were formulated for developing latent images on photosensitive materials such as photographic emulsions. The mechanism of how the latent image nuclei catalyze the reduction of silver ions by a reducing agent to form black colloid…
The synthesis of tert-butylated dihydroxy and alkoxy benzenes from catechol, resorcinol and anisole, with MTBE has been carried out in presence of variety of solid acid catalysts. The current work dealt with the efficacy of various solid acid catalysts in the alkylation of substituted benzenes and MTBE. MTBE is a bett…
Electrochemical copolymerization of 2-aminodiphenylamine (2ADPA) with aniline (ANI) was carried out in aqueous hydrochloric acid by using cyclic voltammetry. In addition, cyclic voltammetry was used to evaluate the differences in electrochemical characteristics of the copolymer in comparison with the corresponding hom…
The miscibility and thermal degradation of poly(ethylene glycol) (PEG)-toughened novolac-type phenolic resin were investigated. Differential scanning calorimetry (DSC) results confirmed that the phenolic resin/PEG blend was blended completely. Infrared spectra show that hydrogen bonding existed in the blends. Thermal…
Poly(vinylpyrrolidone) films containing cobalt chloride or iodine were investigated to obtain information on their possible use as a humidity sensor element. FTIR and UV-VIS spectroscopies were used to characterize the PVP–I2 and PVP–Co complexes. Infrared spectroscopy revealed a structural change of both shape and in…
Bound rubber in a filled rubber compound is formed by physical adsorption and chemisorption between the rubber and the filler. Styrene–butadiene rubber (SBR) is composed of four components of styrene, cis-1,4-, trans-1,4-, and 1,2-units. Filler–polymer interactions in both silica and carbon black-filled SBR compounds…
A silane functionalized by octafluoroacetophenone was polymerized by the sol–gel method to form an insoluble silicate with perfluoroketone pendants; the silicate was used as a heterogeneous catalyst for the activation of aqueous hydrogen peroxide and the oxidation of aromatic amines and alkenes.
The pitting potential ( E pit ) of single-crystal beryllium in 0.01 M sodium chloride decreased with crystallographic orientation in the order ( 0001 ) > ( 101 ¯ 0 ) > ( 112 ¯ 0 ) . Orientations which were associated with the lowest E pit , ( 101 ¯ 0 ) and ( 112 ¯ 0 ) , were characterized by crystallographically orien…
The chlorine plasma/copper reaction that is the base of a new copper (Cu) dry etching process was studied. The reaction product is a rough and porous Cu chloride compound film. Influences of process parameters such as plasma exposure time, pressure, plasma power, and substrate temperature, on the copper chlorination p…
Conversion coatings for magnesium have traditionally been based on immersion treatment in the solution containing hexavalent chromium compounds. The excellent performance of these coatings as paint bases has been established in a broad range of application. However, the replaceable surface treatment has been strongly…
The interstratified layer nano-hybrids between n-alkylammonium and fluorine mica are prepared by ion-exchanging the interlayer Na+ ions in the synthetic fluorine mica, Na0.66Mg2.68(Si3.98Al0.02)O10.02F1.96, with n-alkylammonium cations, CH3(CH2)n − 1NH3+ (Cn; n = 6, 8, 10, 12, 14, 16, and 18). According to the X-ray d…
It is proposed that a non-polar filler can reduce interfacial energies between polar and non-polar polymers. Experiments have been carried out to test this hypothesis using carbon black as the filler in blends of natural rubber (NR) and a nitrile rubber (NBR) with an acrylonitrile content of 45%. Blends of NR–NBR (70/…
MagSaki software was developed for the magnetic analysis of dinuclear high-spin cobalt(II) complexes. This software performs magnetic analysis to determine magnetic parameters using several types of theoretical calculations, such as the following: (1) a mononuclear complex in an isotropic octahedral field, (2) a monon…
A tetraazaporphyrin (TAP) prepared by condensation of 1-ferrocenyl-1,2,2-tricyanoethylene in the presence of magnesium shows an intense, broad near-IR band in the 700–1300 nm region, which may be ascribed to charge-transfer transitions from the ferrocenyl moiety (substituents) to the TAP ligand.
Various correlations between the size of the trivalent cation (Al, Ga, Fe, and Cr) and the structural characteristics and decomposition behavior of Co-based hydrotalcites (Co/M3+ = 3) have been identified. In situ IR spectra (by the relative ratio of the amount of carbonate in low and high symmetry) and thermogravimet…
The combination of H3 + n[PMo12 - nVnO 40].aq (HPA-n, n = 3) and dioxygen proides a clean and regioselective reagent for the homolytic cleavage of various representative alpha-hydroxy ketones (primaryto tertiary) and turns out to be as efficient for the catalytic ring opening of chiral natural products.