Materials Literature
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Nonpolluting systems based on anionic polyurethane aqueous dispersions were obtained. The prepolymer based on hydroxyl-terminated polybutadiene (HTPB), isophorone diisocyanate (IPDI), poly(propylene glycol) (PPG), and dimethylolpropionic acid (DMPA) were synthesized in bulk. After neutralization with triethylamine (TE…
We applied the electrochemical atomic layer epitaxy (ECALE) methodology to obtain deposits of CdS and ZnS on Ag(111) by alternate underpotential deposition of the elements forming the compounds. The amounts of the elements deposited, determined by stripping coulometry, always yielded a stoichiometric 1:1 ratio. The de…
Silk fabrics were modified by treatment with tannic acid (TA) solution or by acylation with ethylenediaminetetraacetic (EDTA) dianhydride. Kinetics of modification with TA and acylation with EDTA–dianhydride was investigated. The physico-mechanical properties of silk fabrics acylated with EDTA–dianhydride remained unc…
Aromatic polyamides based on a novel bis(ether-carboxylic acid) were synthesized by the direct phosphorylation condensation method. 1,4-Bis(4-carboxyphenoxy)-2,5-di-tert-butylbenzene was combined with various diamines containing flexible linkages and side substituents to render a set of eight novel aromatic polyamides…
Chiral binaphthyl derivatives having two photochromic diarylethene units were synthesized in an attempt to use them as dopants for photoresponsive liquid crystals. These compounds showed thermally irreversible photochromic reactions. The circular dichroism (CD) spectra and the optical rotation values of the derivative…
It is shown that the contributions of electronic and ionic charge carriers to the grain boundary conductivity can be separated by selectively blocking one of the carriers. In this way, the electronic and the ionic partial conductivity at the grain boundary of a 0.016 wt % Fe-doped bicrystal were determined in the temp…
The synthesis and mesomorphic properties of a series of 1,2-phenylene bis[4-(4-alkyloxyphenylazo)benzoates] are reported. The mesophases exhibited by these bent-shaped azo compounds are identified as nematic, smectic A and crystal E phases. All these compounds have fairly low transition temperatures, and so are suitab…
Abstract An algorithm for the calculation of electronic g tensors from configuration interaction (CI) wave functions and its implementation for any ground‐state spin S is described. The algorithm can be used together with either single‐ or multireference CI wave functions but assumes a spatially nondegenerate ground s…
The mechanistic model of uniform CO corrosion is presented which covers: electrochemical reactions at the steel surface, diffusion of species between the metal surface and the bulk including diffusion through porous surface films, migration due to establishment of potential gradients and homogenous chemical reactions…
Colloids, phases, interfaces Emulsions - properties and production Microemulsions, vesicles and liposomes Foams Production and properties of colloid suspensions and dispersions Solids Rheology Solubility parameters Solubility, crystallization Purification, detergency Cosmetics Pharmaceutical technology Food formulatio…
The corrosion of zinc in (HNO3 + H 3 PO 4 ) binary acid mixture containing ethanolamine, diethanolamine and triethanolamine has been studied. In plain mix acid, corrosion increases with concentration of acid and with the temperature. At constant acid concentration, the inhibition efficiency of ethanolamine, diethanola…
The promoting effect of CeO2 in a Cu/CeO2 catalyst for CO oxidation and NO reduction compared to CuO and Cu/ZrO2 is deduced to be based on lowering of redox potentials of copper species in the Cu/CeO2 matrix in relation to CuO and Cu/ZrO2.
Thioethers were used as adsorbates for preparing gold nanoparticles. Different thioether derivatives having from 1 to 4 thioether functionalities were synthesized. Colloids were prepared in a two-phase system, and characterized by 1H NMR and transmission electron microscopy (TEM). The stability of colloids protected b…
Poly(ethylene terephthalate) (PET) and cotton fibres, treated in an appositely set up RF SF6 plasma reactor under different operating conditions, were characterised by XPS, EPR, DSC, XRD, ATR analyses, water contact angle and water droplet roll-off angle measurements. The ageing of plasma-treated samples was also inve…
A new series of CuCoZnAl layered double hydroxides (LDHs) with various Cu/Co atomic ratios were synthesized by a coprecipitation method at constant pH ≈ 9. The effects of Co on the structural properties and reducibility of both as-synthesized and calcined materials were investigated thoroughly by employing powder X-ra…
Space charge in crosslinked polyethylene (XLPE) has been detected under both ac and dc fields. Its role in electrical aging and breakdown is recognized, but not deeply understood. It is thought that identification of the trapping centers in this material would help improve the modeling of conduction and electrical agi…
Hydrogen peroxide is a ‘green’ oxidant whose relatively high cost has prevented it from being applied to commodity chemical processing. In large part, those attributes of the current process (the anthraquinone route) that contribute to the cost of H2O2 also contribute to its non-sustainable features; by-product stream…
Coating strategies for corrosion protection considering intrinsically electronic conducting polymers have become important mainly because of restrictions on the use of heavy metals due to their environmental problems. This work presents the electrochemical behavior of an acrylic blend formed by sulfonate-doped polyani…
The micellar-like particle systems produced from poly-D,L-lactide-poly(ethylene glycol) (PLA-PEG) copolymers have been assessed using a range of physicochemical characterisation methods, followed by in vivo studies of their biodistribution after intravenous administration to the rat. The size of the PEG chain was kept…
Treatment of dichloro- and dicarboxylato-tin(IV) porphyrins with K2CO3 in THF–H2O (4 ∶ 1) is a mild and highly efficient method for formation of dihydroxotin(IV) porphyrins; unlike other reported procedures, this method is especially good for lipophilic porphyrins and bis-porphyrins. The synthesis of the mixed metal d…