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。
A hyperbranched aromatic poly(amide−imide) was prepared by the copolymerization of 4-(3,5-dicarboxyphenoxy)phthalic anhydride, a B‘B 2 type monomer, and 1,4-phenylenediamine, an A 2 type monomer. The rapid reaction between the anhydride and amino group led to the formation of the dominant imide intermediate which can…
Using density-functional theory we have calculated the equilibrium geometries and binding energies of a CO monolayer adsorbed on the nonpolar (1010) and the polar (0001)-Zn and (0001)-O surfaces of ZnO. Different adsorption sites and CO orientations were considered, and for the polar surfaces the influence of a hydrog…
Abstract The purpose of this work was to study how viscose fiber behaves in polypropylene (PP) matrix when maleated polypropylene (MAPP) is used as a coupling agent. The influences of processing conditions on composite properties was of interest. Composites were characterized by FTIR and mechanical testing. The most n…
Growth rates and morphologies of thin (0.1−2 μm) and thick (30 μm) films of miscible poly(ε-caprolactone)/poly(vinyl chloride) (PCL/PVC) blends have been investigated. Under isothermal crystallization, PCL growth rates decrease in blend films thinner than 1 μm. However, in pure PCL films, no growth rate dependence is…
A composite membrane was prepared by chemical polymerization of a thin layer of polyaniline (PANI) in the presence of high oxidant concentration on a single face of a sulfonated cation-exchange membrane (Neosepta CMX from Tokuyama Soda Inc.). The CMX−PANI composite membrane was characterized as a function of the polym…
Absorption and steady-state emission spectra and time-resolved luminescence decays have been recorded for CdS nanoparticles prepared using the reverse-micelle method. Spectra were collected in hexane solution, with the surfactant AOT as stabilizer. The emission spectra of these particles are characteristic of trap-sta…
Nanosized beta carbon nitride (β-C 3 N 4 ), of grain size several tens of nanometres, has been synthesized by mechanochemical reaction processing. The low-cost synthetic method developed facilitates the novel and effective synthesis of nanosized crystalline β-C 3 N 4 ( a = 6.36 Å, c = 4.648 Å) powders. The graphite po…
Abstract Nanostructure of poly(ethylene‐ co ‐vinyl acetate)/organically modified montmorillonite (MMT; EVA/organoclay) nanocomposites prepared by melt intercalation process was investigated using X‐ray diffraction (XRD) and transmission electron microscopy (TEM). Three kinds of organoclays were used to see their influ…
Abstract PAMAM dendrimers functionalized with nitronyl nitroxide radicals were characterized. Quantitative determination of substitution with radicals was performed using EPR and electrochemical methods. The study of the 1 H NMR relaxation of the surrounding water showed how the outer‐sphere contribution to the relaxi…
Inorganic nanostructures that interface with biological systems have recently attracted widespread interest in biology and medicine. Nanoparticles are thought to have potential as novel luminescent probes for both diagnostic (e.g., imaging) and therapeutic (e.g., drug delivery) purposes because of their size comparabl…
Orchestia cavimana is a terrestrial crustacean, which cyclically stores calcium in diverticula of the midgut, in the form of calcified amorphous concretions. These concretions are associated with a proteinaceous matrix, the main constituent of the soluble matrix is Orchestin, an acidic calcium-binding protein [Testeni…
Linear dynamic viscoelastic properties of functionalized block copolymer/organoclay nanocomposites were investigated. The organoclay employed (Cloisite 30B, Southern Clay Products) is natural clay modified with methyl, tallow, bis(2-hydroxyethyl), quaternary ammonium chloride (MT2EtOH). Nanocomposites were prepared by…
Surface‐modified nanoparticles have received much attention as drug carriers. Natural and synthetic polymers are used as the materials to prepare nanoparticles and the properties of these nanoparticles originate with these polymeric materials. In particular, these nanoparticles are modified for specific objectives. Th…
Designed as a basic and introductory reference, this book not only addresses stainless steels in the light of their resistance to corrosion for which they are more commonly recognised, but also explains the wide range of other useful properties attributable to the various and specific categories of these alloys. This…
A highly ordered composite Ni−Cu nanowire array has been fabricated within the pores of an anodic aluminum oxide (AAO) template by pulsed electrodeposition, and it has been characterized by transmission electron microscopy (TEM), selected-area electron diffraction (SAED), magnetic force microscopy (MFM), and supercond…
The synthesis, characterization, and development of new nanoparticle materials have both scientific and technological significance. Surface initiated polymerization (SIP) from nanoparticle surfaces involves the growth of end‐tethered polymer brushes where the length or thickness can be more than twice the radius of gy…
A versatile Monte Carlo program for quantitative particle analysis in electron probe X-ray microanalysis is presented. The program includes routines for simulating electron-solid interactions in microparticles lying on a flat surface and calculating the generated X-ray signal. Simulation of the whole X-ray spectrum as…
The combination of two design strategies for engineering large second-order nonlinear optical polarizabilities is critically analyzed and contrasted with a recent limiting theory for nonlinear molecular polarizabilities. Elongation of the conjugation path length and N -arylation in stilbazolium chromophores both are e…
The phase behavior of eight poly(styrene- b -isoprene) diblock copolymers in the neutral solvent dioctyl phthalate (DOP) has been examined over the full concentration (φ) range and from room temperature up to 250 °C. The copolymer compositions ( f ) ranged from 0.15 to 0.76, and molecular weights were chosen to make t…
Piezoelectric constant and temperature-dependent dielectric constant measurements have been performed on ⟨110⟩-oriented (1 − x )Pb (Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 crystals with different compositions under different poling fields. The width of the morphotropic phase boundary region (0.30 < x < 0.35) is determined on t…