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。
Antimicrobial film was extruded using LDPE resins and potassium sorbate powder; its tensile properties, transparency and antimicrobial activity were measured to examine the adaptability as a packaging material. The tensile properties were not affected significantly by the incorporation of potassium sorbate to 3% (w/w)…
The evolution of the structural properties of ${A}_{1\ensuremath{-}x}{A}_{x}^{\ensuremath{'}}{\mathrm{MnO}}_{3}$ was determined as a function of temperature, average $A$-site radius $〈{r}_{A}〉,$ and applied pressure for the ``optimal'' doping range $x=0.25,$ 0.30, by using high-resolution neutron powder diffraction. T…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemical Control in Organic Synthesis Using Silicon-Containing CompoundsIan Fleming, Asuncion Barbero, and David WalterView Author Information Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, England Cite this: Chem. Rev. 1997, 97, 6…
Following an overview of the primitive state of mechanistic studies of the formation of nanoclusters, with a focus on LaMer's classic work on the formation of sulfur sols, kinetic and mechanistic studies of the formation of our recently reported novel P 2 W 15 Nb 3 O 62 9 - polyoxoanion- and Bu 4 N + - stabilized Ir ∼…
A new formulation of the Fourier modal method (FMM) that applies the correct rules of Fourier factorization for crossed surface-relief gratings is presented. The new formulation adopts a general nonrectangular Cartesian coordinate system, which gives the FMM greater generality and in some cases the ability to save com…
Polypropylene (PP)−clay hybrids (PPCH) have been prepared by simple melt-mixing of three components, i.e., PP, maleic anhydride modified polypropylene oligomers (PP-MA), and clays intercalated with stearylammonium. The dispersibility of 10-Å-thick silicate layers of the clays in the hybrids was investigated by using a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFrom Microporous to Mesoporous Molecular Sieve Materials and Their Use in CatalysisAvelino CormaView Author Information Instituto de Tecnología Química, UPV-CSIC, Universidad Politécnica de Valencia, Avda. de los Naranjos s/n, 46022 Valencia, SpainCite this: Chem. Rev. 1997,…
Computer Program Abstracts The category Computer Program Abstracts provides a rapid means of communicating up-to-date information concerning both new programs or systems and significant updates to existing ones. Following normal submission, a Computer Program Abstract will be reviewed by one or two members of the IUCr…
This article deals with the characterization of the structural changes induced by uniaxial extension in the amorphous phase of an ethylene/butene copolymer. Volume change measurements indicate a reversible densification relevant to a strain-induced organization in the amorphous phase. The dynamic mechanical behavior s…
The fundamental results of the Coupling Model, i.e . crossover from independent relaxation at short-times to slowed down cooperative relaxation at a temperature independent time t c, are represented by three equations. They are shown to be in accord with experimental data in molecular glass formers, glass-forming, gla…
Poly(OxyMethylene) (POM) and its miscible blends were studied by multifrequency A.C. dielectric and thermally stimulated currents (TSC). The blends contained small amounts of either poly(vinyl phenol), which is a high glass transition (Tg) diluent, or a styrene-co-hydroxy styrene oligomeric low Tg diluent. The variati…
We describe an original QSPR model called the EVM model (Energy, Volume, Mass) to calculate the glass transition temperature (Tg) of aliphatic acrylate and methacrylate homopolymers using classical molecular mechanics and dynamics. The latter was used to calculate an energy density function related to the cylindrical…
The novel polyetherethersulfone (PES-C) prepared from phenol-phthalein in our institute is an amorphous, rigid, tough material with good mechanical properties over a wide temperature range. To improve its water vapor permeability for the application of gas drying, the PES-C was sulfonated with concentrated sulfuric ac…
The miscibility of polycarbonate PC and poly(butylene terephthalate) PBT is controversially discussed in the literature. Partial miscibility has been generally found in melt blends of the two polymers. However, in solution cast blends they were found to be immiscible. It is known that the transesterification takes pla…
A series of polyesters were synthesized by the bulk polycondensations of the respective combinations of two difuranic diesters, i.e., bis(5-(methoxycarbonyl)-2-furyl)methane (4a) and 1,1-bis(5-(methoxycarbonyl)-2-furyl)ethane (4b), with two 1,4 : 3,6-dianhydrohexitols [1,4 : 3,6-dianhydro-D-glucitol (1) and 1,4 : 3,6-…
The results of the studies of the structure and properties of non-crystalline (liquid and amorphous) oxide systems obtained using computer simulation methods are summarised. The models of simple oxides, homologous series of non-crystalline oxides and of binary and multi-component oxide systems are considered. The resu…
In nature, supercooled liquids play an important role in areas as diverse as volcanoes and hibernating animals. From a technological standpoint, supercooled liquids are linked intimately to processes ranging from the development of new materials to the storage of nuclear waste. It is also becoming increasingly evident…
Polyaniline, synthesized by using potassium dichromate as the oxidant, was doped with iodine in order to increase its electrical conductivity. The iodine-doped polyanilines attained a conductivity of 1.83 × 10−3 S/cm, which was about eight orders of magnitude greater than that of intrinsic polyaniline. The iodine-dope…
The kinetics of the isothermal polymerization of acrylic acid were determined utilizing 1H-NMR spectroscopy. The polymerization rate was observed to depend approximately on the \documentclass{article}\pagestyle{empty}\begin{document}$ \frac{3}{2} $\end{document} power of monomer and the \documentclass{article}\pagesty…
It has been revealed using microlensing that a considerable part, possibly more than half, of the dark matter in the halo of our Galaxy consists of objects with a mass spectrum ranging from 0.05 to 0.8 of the solar mass. What is the nature of these objects? There exist two hypotheses. According to one, these are Jupit…