Theoretical, experimental and viscometric studies of a new phosphorus trifonctionnel epoxy polymer:Triglycidyl Dihydroxy Diphenyl Ether Phosphoric Ester (TGDHDPEPE)

we synthesized in this work a new macromolecular binding phosphorus epoxy matrix trifunctional triglycidyl dihydroxy diphenyl ether phosphoric ester (TGDHDPEPE). We also caracterized the prepolymer epoxy phosphorus by Infrared Spectroscopy Fourier Transform (FTIR). Then we studied its viscosimetric behavior compared to the DGEBA. The latter are performed by using a viscometric apparatus of Ubbelohd type. Finally, we tried to optimize the parameters which influence  the reaction of polycondensation for a good yield by the upstream of the synthesis of this new epoxy matrix TGDHDPEPE by experimental design method. This prepolymer epoxy was obtained with a good yield

Theoretical study of the impact of quantum chemistry parameters on the behaviour al effect of the coating of a new epoxy prepolymer

The aim of our work is to evaluate the performance behavior of the coating of macromolecule epoxy matrix, tri glycidyl ether ethylene of bisphenol A (TGEEBA) on the corrosion of the carbon steel E24 in a marine environment and examine its mechanism of the coating. Subsequently, we have studied the possible adsorption model on the surface of the carbon steel E24 corroded and can explain the understanding of the interactions between the coating macromolecule and the surface of the carbon steel E24. The coating effect on carbon steel E24 was studied by quantum chemical calculations. The adsorption of TGEEBA on the surface of the carbon steel E24 has been well described by the model Quantitative Structure Property Relationship (QSPR).The mechanism of the behavior of the coating was determined by a potential of zero-load measurement and some electronic parameters. The prediction of the behavior of the coating was carried out by the method of three Becke compounds of the parameter (UB3LYP) whose semi-empirical basis are PM6 and DFT for an eventual composite. These last were used on the basis of (6-311 G). All calculations were performed using Gaussian software bias (03)

Exponential Stabilization of an Overhead Crane Model

Abstract A problem of exponential stabilization of an overhead crane model represented by a PDE is considered. For any r > 0, the exponential stability at the desired decay rate r is solved in semigroup setting by a collocated-type stabiliser of a target system combined with a term involving the solution of an appropriate PDE. This work is based on paper

Synthesis, viscometric and microscopic characterization of a new bifunctional sulfur epoxy resin.

The objective of our work consists in synthesizing a new bifunctional epoxy resin in which the aromatic radical matrix contains connections (C = C, C = N, CC and CS) by two stages. In the first course, we obtained the precursor molecule of the epoxy matrix (6- (4-chlorophenyl) -5-ethoxy-4-methyl-1, 6-dihydropyrimine-2-thiol) .The second stage tended to functionalize the latter by the epichlorohydrin. The microscopic characterization of the synthesized resin was: confirmed by the Infra-red Fourier transform (FTIR) and the nuclear magnetic Resonance (NMR), on the one hand, while the parameter of viscosity was evaluated on the other hand

Alteration hydrothermale et deformation ductile des roches volcaniques acides associees au gisement sulfure de draa sfar (Jebilet Centrales, Maroc)

The volcanics and volcanoclastic rocks of Draa Sfar (Central Jebilet, Moroccan hercynian belt) are affected by ductile stress and hydrothermal alteration accompanied by a weak degree of metamorphism (greenschist facies). Some N-S oriented shearing zones, affect locally these formations while being the site of an important hydrothermal activity. The consequences of these transformations from a non to slightly- deformed rhyodacite, show that through these ductile shearing zones: (1) the mineralogical assemblage of hydrothermal alteration is essentially formed by chlorite, sericite, quartz and magnetite; (2) the gradual increase of the alteration indexes is accompanied by the destruction of the phenocrists and the recrystallization of the matrix by phyllosilicates and quartz; (3) the progressive transfer of material is more intense in the more deformed zones where the values of Ti, Al and Zr remain constant. These shearing zones played a very important role in the circulation of fluids and the transformation of the rhyodacite of Draa Sfar.Les roches volcaniques et volcanoclastiques de Draa Sfar (Jebilet centrales, Maroc hercynien) sont affectées par une déformation ductile accompagnée d’un métamorphisme de faible degré (faciès schistes verts) et d’une altération hydrothermale. Des zones de cisaillement de direction N-S, ont affecté localement ces formations tout en étant vecteurs d’une importante activité hydrothermale. Le suivi de ces transformations à partir de la rhyodacite non ou peu déformée, montre qu’à travers ces zones de cisaillements ductiles : (1) l’assemblage minéralogique d’altération hydrothermale est formé essentiellement de chlorite, de séricite, de quartz et de magnétite ; (2) l’augmentation graduelle des indices d’altération s’exprime par la destruction des phénocristaux au profit d’une matrice recristallisée en phyllosilicates et quartz ; (3) le transfert progressif de la matière est plus intense dans les zones déformées où Ti, Al et Zr restent constants. Ces zones de cisaillements ductiles ont joué un rôle très important dans la circulation des fluides à l’origine de la transformation en phyllosilicates de la rhyodacite de Draa Sfar

Characterization and formulation of a new eco-friendly hydraulic binder based on combination of inorganic and organic admixtures

This work aims to valorize a mineral and natural resources such as the Limestone Fillers (F-Lime) and the Natural Pozzolan (PN) by incorporating them into the formulation matrix of cement or concrete. In order to minimize the CO2 emissions into the atmosphere, to reduce the energy and raw materials consumption and as well as, to improve the physical and mechanical properties in fresh cement paste and of mortar or concrete in the hardened state. In this present manuscript, we substituted the clinker by the combination between the F-Lime and NP at 40% by weight of cement with steps of 5% with the admixture of superplasticizers. The influences of the incorporation of these additions on physical and mechanical properties of mortar or concrete in the fresh cement paste and hardened state were evaluated. The obtained results by different formulations elaborated to show that the replacement a part of clinker by the mixing of F-Lime and PN has produced a new hydraulic binder eco-friendly and durable with improved physicochemical, physical and mechanical properties. These results show that we have succeeded to manufacture, characteristic and formulated of new ecofriendly hydraulic binder and sustainable with improved physical, chemical, and mechanical properties while minimizing greenhouse gas emissions on one hand and the reducing the energy raw materials consumption on the other hand

Characterization and formulation of a new eco-friendly hydraulic binder based on combination of inorganic and organic admixtures

This work aims to valorize a mineral and natural resources such as the Limestone Fillers (F-Lime) and the Natural Pozzolan (PN) by incorporating them into the formulation matrix of cement or concrete. In order to minimize the CO2 emissions into the atmosphere, to reduce the energy and raw materials consumption and as well as, to improve the physical and mechanical properties in fresh cement paste and of mortar or concrete in the hardened state. In this present manuscript, we substituted the clinker by the combination between the F-Lime and NP at 40% by weight of cement with steps of 5% with the admixture of superplasticizers. The influences of the incorporation of these additions on physical and mechanical properties of mortar or concrete in the fresh cement paste and hardened state were evaluated. The obtained results by different formulations elaborated to show that the replacement a part of clinker by the mixing of F-Lime and PN has produced a new hydraulic binder eco-friendly and durable with improved physicochemical, physical and mechanical properties. These results show that we have succeeded to manufacture, characteristic and formulated of new ecofriendly hydraulic binder and sustainable with improved physical, chemical, and mechanical properties while minimizing greenhouse gas emissions on one hand and the reducing the energy raw materials consumption on the other hand