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 reactive compatibilization of immiscible polymers such as high-density polyethylene (HDPE) and poly(ethylene terephthalate) (PET) by interfacial grafting of maleic anhydride (MA) without initiator in the molten state was investigated in this study. Grafting reaction of MA onto HDPE was carried out in a Rheocord HA…
Graft copolymerization of acrylonitrile (AN) onto defatted pineapple leaf fiber (PALF) was studied using a CuSO4 and KIO4 combination as an initiator in an aqueous medium in the temperature range 30–500C. The effects of the concentration of potassium periodate, CuSO4, and monomer on the graft yield were investigated.…
Blends of poly(vinyl chloride) (PVC) with different ratios of chlorinated polyethylene (CPE) were degradated by the thermogravimetric method under dynamic conditions (50–600°C) in an inert atmosphere. The effect of the miscibility and composition of the PVC/CPE blends on the thermal stability were investigated. DSC cu…
Ultrathin films of an electrostatically-modified biotinylated polythiophene have shown interesting electrochemical properties which lead to the detection of femtomoles of the protein avidin in aqueous electrolytes.
Alumina- and silica-supported bimetallic Pt–Sn catalysts with different Pt/Sn atomic ratios have been prepared by using the bimetallic complex cis-[PtCl(SnCl3)(PPh3)2], the monometallic complex cis-[PtCl2(PPh3)2] and SnCl2 as metal precursors. Catalysts have been characterised by X-ray diffraction and transmission ele…
In comparison to other kinds of crosslinked thermoset foam, recyclable polyolefin foam is an environmentally friendly material, but it increases the degree of foaming in the foam extrusion process. In order to overcome this shortcoming, the effect of material and process variables on the degree of foaming and the grow…
Twenty-nine new oxypregnane glycosides were obtained along with two known cardenolides, frugoside and gofruside, and three known 12-O-acylated pregnane glycosides from the roots of Asclepias incarnata L. (Asclepiadaceae). By detailed studies of the 1H- and 13C-NMR spectra, the structures were determined to be tri- to…
We describe the synthesis and photophysical properties of a series of neutral and cationic 3,4-tetrapyridinoporphyrazines, potential lead photosensitizers for photodynamic inactivation of bacteria. Tetracationic TPyPzs exist essentially as monomers in aqueous systems, but the presence of trialkylated compounds due to…
Nanostructured platinum films with an hexagonal array of uniform, regularly-sized pores were grown on platinum substrates by electrochemical plating from a liquid crystalline electrolyte. The films were characterised as models for nanoporous electrodes, first by cyclic voltammetry in dilute sulfuric acid, showing enha…
The purpose of this study was to prepare a small diameter vascular prosthesis functioning without pseudointima formation. A nonthrombogenic phospholipid polymer, the 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer, has a cell membrane-like structure and has demonstrated strong nonthrombogenicity. We have recent…
The irradiation of n-type Si(111) submerged in HF(aq) with a UV, visible or IR laser can lead to the formation of photoluminescent porous silicon (por-Si) thin films. We demonstrate that two distinct photoelectrochemical etching processes are induced by illumination: anisotropic etching, which leads to pore formation…
The CeO2–La2O3 catalytic system was prepared by a sol–gel technique from inorganic precursors in the presence or absence of H2O2 . Samples were characterised by means of nitrogen physisorption, TG-DTA, XRD, IR, XPS and TEM. Preparation ia sol–gel in the presence of H2O2 produces certain interesting modifications in Ce…
The low-temperature mechanical behavior of semicrystalline polymer blends is investigated. Isotactic polypropylene (iPP) is blended with both Zeigler–Natta polyethylene (PE) and metallocene PE. Transmission electron microscopy (TEM) on failed tensile bars reveals that the predominate failure mode in the Zeigler–Natta…
An approach is presented for the graft copolymerization of type I atelocollagen onto the surface of polyurethane (PU) films treated with ozone. Through inducing oxidization to modify PU surface by ozone, peroxide groups are easily generated on the surface. Those peroxides are broken by redox-polymerization, and provid…
Semiconductor quantum dots have been used for the first time to label trichosanthin. The absorption and fluorescent spectra of quantum dot-labeled trichosanthin were different from those of trichosanthin, but no changes were found in the enzymatic activity of quantum dot-labeled trichosanthin in comparison with tricho…
Four porphyrins and one chlorin having aromatic groups at the meso position have been synthesized and tested as potential sensitizers for the photooxidation of phenols. The yields of conversion of 1,5-dihydroxynaphthalene and 2,3,5-trimethylphenol to their corresponding quinones have been determined following photolys…
Experience with the application of the sum current method to on-line diagnostics of high-voltage bushings and current transformers is presented. The method and analysis are described along with field experience obtained at fourteen substations, comprising 56 sets of (three) bushings and current transformers. The influ…
All six isomers of pyridinedicarboxylate (2,3-PDA; 2,4-PDA; 2,5-PDA; 2,6-PDA; 3,4-PDA; 3,5-PDA) can be intercalated by the layered double hydroxide [LiAl2(OH)6]Cl·H2O in water at 100 °C to give the fully ion-exchanged first stage intercalation compounds [LiAl2(OH)6]G0.5·xH2O (G = 2,3-PDA; 2,4-PDA; 2,5-PDA; 2,6-PDA; 3,…
Related DatabasesWeb of Science You must be logged in with an active subscription to view this.Article DataHistoryPublished online: 27 July 2006Keywordsconvolution, interface, Huygens' principle, motion by mean curvature, threshold growthAMS Subject Headings65C20, 82C24Publication DataISSN (print): 0036-1399ISSN (onli…
The effects of several low molecular weight compounds with hydroxyl groups on the physical properties of poly(ε-caprolactone) (PCL) were investigated by Fourier transform infrared (FTIR) spectroscopy and high-resolution solid-state 13C NMR. PCL and 4,4′-thiodiphenol (TDP) interact through strong intermolecular hydroge…