Materials Literature
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Inhibition of corrosion of carbon steel in dam water (Tamil Nadu, India) by Pentane sulphonicacid as its sodium salt (SPS)-Zinc ion system has been studied using weight-loss and potentiodynamic polarization methods. Results of weight loss method indicated that inhibition efficiency (IE) increased with increasing inhib…
This paper presents the results of preparing and investigating the solid solution of lead barium zirconate titanate stannate (Pb 1− x B a x )[(Zr 1− y T i y ) 1− z S n z ]O 3 with x = 0.25, y = 0.35 and z = 0.00, 0.02, 0.04, 0.08, 0.10. Ceramic samples were obtained from oxides and carbonates using conventional cerami…
The growth behavior of carbon nanotubes synthesized from C2H2 at the temperature range of 700 to 900°C and using thermal chemical vapor deposition (TCVD) method has been investigated. Thin films of nickel (Ni) catalyst, were coated on SiO2 substrates by ion beam sputtering technique. The formation of catalytic nickel…
The article deals with two issues concerning reflection electron energy loss spectroscopy (REELS), namely, which angular cutoff should be used to properly define the phase space of energy loss into plasmon excitations and how approximate evaluations of the surface component of the momentum transfer can affect the surf…
The title compound, C(10)H(8)O(6), a promising raw material to obtain colorless polyimides which are applied to microelectronic and optoelectronic devices, adopts a folded conformation in which the dihedral angle between the two anhydro rings is 55.15 (8)°. The central six-membered ring assumes a conformation inter-me…
Archaeological bronze artefacts are covered with corrosion products, that is, the patinas , whose nature depends on different degradation processes occurring during long‐term burial. As a consequence of the corrosion phenomenon, surfaces of archaeological metal objects are composed of a complex structure. By means of…
Abstract Two steps were used in the synthesis of a microencapsulated intumescent flame retardant (MIFR). First bis (1‐oxo‐2,6,7‐trioxa‐l‐phosphabicyclo[2.2.2]octane‐4‐methylol) phosphate melaminium salt (Melabis) was synthesized. Then the Melabis was encapsulated with melamine resin to obtain the MIFR. Its structure w…
Dendritic microenvironments defined by dynamic internal cavities of a dendrimer were probed through geometric isomerization of stilbene and azobenzene. A third-generation poly(alkyl aryl ether) dendrimer with hydrophilic exterior and hydrophobic interior was used as a reaction cavity in aqueous medium. The dynamic inn…
This paper reports functionalized zinc sulphide (ZnS) semiconductor nanocrystals (quantum dots, approx., 2.5 nm) which are an important building block in self-assembled nanostructures. ZnS is functionalized by organic stabilizer Thio glycolic acid (TGA). The samples have been synthesized by colloidal technique at rela…
Biocomposites of polylactic acid with cellulose whiskers from grass were prepared and reinforced with nanolayer-filled ionomer (Surlyn®). Three types of polymer composites were fabricated by filling the whiskers in polylactic acid at 5, 10, and 15% concentration. The analysis of resulting products was conducted by mon…
An age hardenable Mg–2.5Zn–0.1Ca–0.1Mn (mol%) alloy has been developed. The extruded sample followed by a T5 treatment reveals 290 and 269 MPa of tensile and compressive proof stresses, respectively. Elongation to failure in tension and compression were 22 and 13%, respectively. The stresses were comparable to those i…
The luminescence properties of K(1/2)Bi(1/2)TiO(3):Pr(3+) and Na(1/2)Bi(1/2)TiO(3):Pr(3+) powders are investigated in the temperature range 10-600 K. The experimental data are interpreted on the basis of metal-to-metal charge transfer processes and by considering Bi(3+)-to-Pr(3+) sensitization effects.
Poly(lactide-co-glycolide) (PLGA)-laponite-F68 nanocomposite (PNC) vesicles were prepared through a technically facile, single-step water/oil/water double-emulsion method using ethyl acetate/water mixture. Vesicles of diameter 100 nm to 1.2 μm and average membrane thickness 30 nm were produced. Encapsulation with chem…
Abstract The combined effect of a basic hindered amine light stabilizer (HALS) and ultraviolet absorbers (UVAs) on casted poly(vinyl chloride) (PVC) films, during photodegradation, was studied by color change, ultraviolet‐visible (UV–vis) spectroscopy, Fourier‐transform infrared (FTIR) spectroscopy, and viscosity‐aver…
(204m)Pb perturbed angular correlation of γ-rays (PAC) spectroscopy has been applied successfully for the first time to detect the nuclear quadrupole interaction in a lead(II) coordination compound in a molecular crystal [tetraphenylarsonium lead(II) isomaleonitriledithiolate ([AsPh(4)](4)[Pb(2)(i-mnt)(4)])]. The reco…
The electrochemical noise (EN) and electrochemical frequency modulation (EFM) techniques have been compared for their use to detect pitting corrosion. To do this, experiments on different corroding systems showing passivation and pitting corrosion were carried out. These corroding systems were: (1) Aluminum in borate…
Shock wave propagation in multiphase media is typically dominated by the relative compressibility of the two components of the mixture. The difference in the compressibility of the components results in a shock-induced variation in the effective volume fraction of the suspension tending toward the random-close-packing…
A simple, novel method of synthesizing self-assembled, nanostructured conducting polymer films has been developed. Applying an increased centrifugal force on the electrodes during the electrochemical deposition process yields high surface area, micro- or nanostructured polymer films. Scanning electron microscopy showe…
Abstract Evolution of the complex viscosity of pastes of PVC‐VA (vinyl chloride‐vinyl acetate copolymer) plasticized with different commercial plasticizers has been studied. Knowledge of the rheological behavior of the formulations allows for better understanding of the gelation and fusion processes. Twenty commercial…
The monotonic and cyclic deformation behavior of ultrafine-grained metastable austenitic steel AISI 304L, produced by severe plastic deformation, was investigated. Under monotonic loading, the martensitic phase transformation in the ultrafine-grained state is strongly favored. Under cyclic loading, the martensitic tra…