11 research outputs found
Preparation and surface active properties of oxypropylated diol monoesters of fatty acids with an amide oxime terminal group
Preparaci贸n y propiedades de tensi贸n superficial de diol mono茅steres oxipropilados de 谩cidos grasos con un grupo terminal amido oxima
Locally produced non-edible oil, namely, rice bran oil (R.B.O.) was utilized as starting materials for preparing new nonionic surfactant. Oxypropylated diol monoesters of linoleic and rice bran oil fatty acids were prepared. Also amide oxime derivatives were obtained. Surface active properties of these compounds were measured. Under neutral condition amide eximes served as nonionic surfactants and their properties were similar to other oxypropylated monoesters.Se ha utilizado un aceite no comestible de producci贸n local, denominado, aceite de salvado de arroz (R.B.O.) como materia prima para la preparaci贸n de nuevos tensioactivos no i贸nicos. Se prepararon diol mono茅steres oxipropilados de 谩cido linoleico y 谩cidos grasos de aceite de salvado de arroz. Tambi茅n se obtuvieron los derivados de amido oxima. Se midieron las propiedades de tensi贸n superficial de estos compuestos. Bajo condiciones neutras las amido eximas sirvieron como tensioactivos no i贸nicos y sus propiedades fueron similares a los de otros mono茅steres oxipropilados
Studying the Effect of Low 伪-Radiation Doses on CR-39 Polymers Using Positron Annihilation Lifetime and Mechanical Properties
Structure effect of some amine derivatives on corrosion inhibition efficiency for carbon steel in acidic media using electrochemical and Quantum Theory Methods
The structure effect on corrosion inhibition of two amines and their derivatives is the main object of this article. The first amine was 1,8-diaminooctane and its ethoxylated (50聽e.o.) 1,8-diaminooctane and propoxylated (50聽p.o.) 1,8-diaminooctane. The second amine is the tetraethylenepentamine and its ethoxylated (50聽e.o.) and propoxylated (50聽p.o.) derivatives. The investigations were carried out by open circuit potential, potentiodynamic polarization, electrochemical impedance, quantum calculations and SEM measurements. The data obtained for the first amine showed the minimum inhibition efficiency (65.5%), meanwhile the maximum inhibition efficiency was 78.9% for its propoxylated derivative. On the other hand the maximium inhibition efficiency was 91% for the second propoxylated amine. The electronic properties; HOMO and LUMO energy levels, energy gap, dipole moment, polarizability, log P, total energy, charge densities, area/molecule and hydration energy have been calculated. The inhibition efficiency was calculated theoretically using the electronic parameters. From the obtained results, there is a significant difference between the inhibition efficiency of the electronic and the inhibition efficiency experimentally. The results were discussed on the light of the chemical structure of the used inhibitors. In general, the inhibition efficiency is affected by the shape and structure of the molecule