this work, we studied two types of compounds used in the protection of iron surface. The first type was performed on the organophosphate models, and the second based epoxy resins functional TGPO/HGAPPO. Thereafter we used the Quantitative Structure-Property Relationship Approach (QSPR) to connect The properties with descriptors to predict the polarization resistance to corrosion and inhibition of structures studied. To do this, we calculated the quantum chemical properties using the Gaussian 03 software hybrid B3LYP with 6-31 G (d) basis set with the aim of comparing the polarization resistance of two epoxy resins with those of phosphorus two organic phosphorus inhibitors. In addition, the electronic properties such as the highest occupied molecular orbital (HOMO), lowest unoccupied orbital (LUMO) energy and the molecular density were studied. We found as results of this study that the organophosphorus epoxy resin is very effective than the organic compounds studied.
In this work we have synthesized a new bifunctional epoxy resin namely diglycidyl 3-aminopropyl triethylsilane (DGAPTES). This resin was synthesized in two steps: the first one is condensing the epichlorohydrin with 3-aminopropyl triethylsilane; the second is introducing the calcium carbonate as a base to form the oxirane cycle. The resin obtained was characterized by infrared Fourier transformation spectroscopy (FTIR), its chemical structure was also confirmed by the nuclear magnetic resonance of 1H and proton and carbon 13C (1H NMR and 13C NMR) on the one hand, and we have improved the thermal properties of the standard resin (DGEBA) by adding an amount of (DGAPTES) as an organic load in the standard matrix, on the other hand. This formulation has been studied by thermogravimetry as a macroscopic approach. The uptake of humidity of the standard DGAPTES and the crosslinked DGEBA/DGAPTES/MDA according to 80%/20%/traces was studied in order to improve the Fickien behavior.
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