Topic
Chemical binding
About: Chemical binding is a research topic. Over the lifetime, 1822 publications have been published within this topic receiving 52516 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the surface of a glass/epoxy composite material was embedded with oxidized carbon black by heat treatment to enhance the adhesion strength of the composite structure, and the surface free energies and lap shear strengths were investigated in terms of the heat treatment conditions and the amount of embedding.
Abstract: The surface of a glass/epoxy composite material was embedded with oxidized carbon black by heat treatment to enhance the adhesion strength of the glass/epoxy composite structure. Quantitative chemical bonding analysis with X-ray photoelectron spectroscopy (XPS) was conducted to observe the chemical binding states of the surface of the carbon black particles with heat treatment. The morphological effects of the carbon black on the surface of the composite were observed using SEM and AFM. The surface free energies and lap shear strengths of the glass/epoxy adhesive joints whose adherends were embedded with oxidized carbon black were investigated in terms of the heat-treatment conditions and the amount of embedding. From the experimental results, embedding the heat-treated carbon black particles on the composite surface was found to greatly improve the adhesion strength of the composite due to the increased oxidation radicals on the carbon black surface.
14 citations
TL;DR: In this article, the inhibiting behavior of bis-(2-benzothiazolyl)-disulfide on mild steel corrosion was evaluated in 1 M HCl solution.
Abstract: The inhibiting behavior of bis-(2-benzothiazolyl)-disulfide on mild steel corrosion was evaluated in 1 M HCl solution. Weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) techniques were used in this study. In EIS technique, by performing Kramers–Kronig transformations, the experimental results validated, before fitting any theoretical model on them. The obtained results showed that the inhibition efficiency (%IE) increases by increasing the concentration of bis-(2-benzothiazolyl)-disulfide up to 2.02 × 10−4 M (%IE ∼ 62–68). Between the results obtained from various used techniques, a good agreement was found. Polarization curves indicate that the inhibition of the inhibitor is a mixed anodic–cathodic nature and Langmuir isotherm is found as an accurate isotherm describing the adsorption behavior. It also found that its inhibition mechanism of bis-(2-benzothiazolyl)-disulfide is at the interval of physical adsorption and chemical binding. The inhibition efficiency of the inhibitor decreased by rising of temperature in the range of 25–55 °C and these results, verified adsorption behavior of the inhibitor.
14 citations
TL;DR: In this article, a beam of thermal neutrons was filtered through a block of graphite 23 cm long, which had an effective wave-lengh of 7.15 angstroms.
Abstract: Neutrons of energy much lower than thermal were produced by filtering a beam of thermal neutrons through a block of graphite 23 cm long. In such a block, Bragg scattering removes the neutrons whose wave-length is less than the largest Bragg wave-length in graphite, 6.69 angstroms. Measurement of the boron absorption of the filtered neutrons showed that they had an effective wave-lengh of 7.15 angstroms which corresponds to neutron temperatures around 18\ifmmode^\circ\else\textdegree\fi{} Kelvin. The cross section of graphite for the filtered neutrons is 0.70\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}24}$ ${\mathrm{cm}}^{2}$. That a part of this is caused by the incoherence due to thermal agitation of the atoms of the crystal was demonstrated by heating the crystal and observing the increase in this cross section. The filtered neutrons were used to show interference effects in other substances such as Be, Bi, and S. In water a fourfold increase in the scattering cross section of hydrogen due to chemical binding was observed.
14 citations
TL;DR: In this article, PZT films were sputter-deposited on Si/SiO2/Ti/Pt substrates using a dual-target system to reveal the effects of various lead compensation source materials on the microstructure and ferroelectric properties of the films.
Abstract: In this investigation, PZT films were sputter-deposited on Si/SiO2/Ti/Pt substrates using a dual-target system. The dual targets Pb/PZT(PbZr0.54Ti0.46O3) and PbO/PZT(PbZr0.54Ti0.46O3) were used to reveal the effects of various lead compensation source materials on the microstructure and ferroelectric properties of the films. The structures of the films were characterized by X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM). The chemical binding state was determined using X-ray photoelectron spectrometry (XPS). Ferroelectric polarizability was measured using a Radiant Technology RT66A tester. The influence of deposition temperatures on the microstructure and ferroelectric properties of the films was studied. Perovskite PZT films were successfully deposited using the Pb/PZT and the PbO/PZT dual target sputtering systems at a substrate temperature of between 500 and 580∘C. Structural change was elucidated as a function of deposition temperatures and the lead sources were correlated with the ferroelectric properties of the film. The ferroelectric characteristics of the PZT films deposited using the PbO/PZT dual target were better than those of films deposited using the Pb/PZT dual target, because the former films had a higher bonding energy.
14 citations
TL;DR: Analysis of the pyridoxal-P-phosphorylase b derivative shows that the major changes in enzymic characteristics are primarily due to modification of one group per monomer at a specific site on the enzyme.
14 citations