Materials Literature
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Incorporation of 9(10H)-acridone as a chromophore into a seven-coordinate chelating ligand allows observation of sensitised luminescence from the europium(III) complex, even with excitation wavelengths greater than 410 nm.
A novel blend of polypropylene (PP) with Chlorella, a natural microalga, was synthesized successfully by a melt-mixing method with maleic anhydride-modified polypropylene (MPP) as a compatibilizer. The adhesion of hydrophobic PP to hydrophilic Chlorella is based on the formation of chemical bonds between the maleic an…
Glassy carbon electrodes were electrochemically modified by an anodization/cathodization procedure in aqueous H 2 SO 4 . Depending on the anodization time, the active‐layer thickness could be controlled from less than a micrometer to nearly 100 μm. Electrochemical impedance measurements indicated that the capacitance…
Isotactic polypropylene (iPP) has been crystallized in the presence of talc under the quiescent state and shear flow of injection molding. The resulting morphology has been investigated by means of polarizing microscopy, transmission electron microscopy, and wide angle X-ray diffraction. In the quiescent state, the iP…
The formation and thermal stability of the catalytically important anhydrous acids H3PM12O40 (M = Mo,W,V), of the corresponding anhydrides PM12O38.5 and of a novel first time isolated trihydrate H3PW12O40·3H2O have been studied by high temperature X-ray diffraction (XRD) and thermogravimetry (TG). The corresponding cr…
The packing of beta-1,4-glucopyranose chains has been modeled to further elaborate the molecular structures of native cellulose microfibrils. A chain pairing procedure was implemented that evaluates the optimal interchain distance and energy for all possible settings of the two chains. Starting with a rigid model of a…
The adsorption of myoglobin (MGB) onto various kinds of colloidal synthetic hydroxyapatite [X10(PO4)6(OH)2, noted CaHap, SrHap and CaSrHap for X=Ca, Sr and Ca+Sr, respectively] particles was investigated at 15°C in a 1×10−4 mol dm−3 KCl solution of pH 6.0. The adsorption rate of MGB onto CaHap was comparable to that o…
An X-ray crystal structure determination reveals that 1,4,8,11,15,18,22,25-octaisopentylphthalocyanine adopts a saddle conformation, a geometry which shows modified spectroscopic properties and reduced photostability relative to planar ring structures.
XPS, temperature programmed reduction (TPR) and FTIR spectroscopy of adsorbed CO and the hydrogenation of crotonaldehyde were used to study the nature of the surface species present for two Cu–TiO2 catalysts (2 and 5% Cu) subjected to reduction in hydrogen at 523, 623 and 723 K. Despite TPR and XPS evidence for comple…
To chemically attach β-cyclodextrin (CD) molecules to cotton cellulose, N-methylol-acrylamide (NMA) was used to synthesize a CD containing monomer, which was then grafted onto cellulose fibers. Initiation of the cotton cellulose backbone with ceric ion before the addition of acrylamidomethyl cyclodextrin (CD-NMA) mono…
The improvement in the oxygen-barrier properties of poly(ethylene terephthalate) (PET) by orientation and heat setting was examined. Orientation was carried out at 65 °C by constrained uniaxial stretching to a draw ratio of about 4. Heat setting was performed at temperatures from 90 to 160 °C with the specimen taut. O…
The char-forming characteristics of wool are well known but have been little studied during recent years, although flame-retardant activity may be associated with enhanced char formation in many cases. Recently, intumescent flame-retardants have been shown to react synergistically with flame-retarded cellulosic fibres…
Subjecting illuminated n‐type silicon wafers to anodic bias in an HF containing electrolyte results in the formation of macropores under certain conditions. In this paper the formation of randomly nucleated macropores is studied as a function of the applied potential, the temperature, and the doping levels of the samp…
The mechanisms of reactions are investigated between polyvinyl chloride and oxides such as ZnO, Fe2O3 and ZnFe2O4 under inert gas atmosphere at high temperature with combined thermogravimetry-mass spectrometry (TG-MS) technique. From the experiments under a constant heating rate of 40 K/min, the following results are…
We report variations in the coercivity of CoFe/sub 2/O/sub 4/ nanoparticles as a function of particle size, temperature and light intensity. For 30 nm particles, this change in was 2300 Oe at 10 K, 120 Oe at 170 K, for a light intensity of under 2 milliwatts. The remanent magnetization was nearly unchanged by illumina…
2-[4-(2-hydroxyphenyl)tricyclo[5.2.1.02,6]dec-8-yl]phenol (HPTCDP) were prepared from dicyclopentadiene (DCPD) and phenol via Friedel-Crafts alkylation. DCPD-containing phenolic resin (DPR) was also synthesized by incorporating the DCPD-containing monomer HPTCDP with formaldehyde. DPR was further modified by grafting…
Tables 10 and 11 summarize the key takeaways. Looking at the world of “Technical Textiles” (Table 12) it is clear that this unique spectrum of properties will allow PLA polymers to participate in a wider range of markets. In particular, in this segment, the unique combination of outstanding resistance to sunlight, res…
Annual growth agrofibers like flax and jute can compete with glass fibers, considering their intrinsic mechanical properties. This paper discusses reinforcement of polypropylene (PP) homopolymer with flax bast fibers. Maleic Anhydride modified PP (MAPP) grades are screened on coupling efficiency. Three mechanisms appe…
The rate of copper corrosion originated by the action of formic acid vapors at 100% relative humidity was studied. Five formic vapor concentration levels (10, 50, 100, 200, and 300 ppm) were used. A copper corrosion rate of up to was measured for a period of 21 days using a gravimetric method. The patina layers were c…
Reflectivity of X-rays from surfaces and interfaces reflectivity experiments advanced techniques statistical description of surfaces and interfaces off-specular scattering scattering with coherent radiation.