- Synthesis, characterization, thermal and computational studies of novel tetra–azido compounds as energetic plasticizers
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In this paper, four azido compounds have been synthesized and characterized as new energetic plasticizers. Nuclear magnetic resonance (NMR) and infrared (IR) spectroscopy, elemental analysis, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and differential thermal analysis (DTA) have been used to identify and determine the properties of the synthesized plasticizers. The plasticization effect of plasticizers on glycidyl azide polymer (GAP) has been investigated by viscosity measurements and thermal analysis of the prepolymer–plasticizer mixtures and plasticized binders. The plasticized mixtures were cured by a diisocyanate curing agent and the glass transition temperature and decomposition temperature of the cured polyurethane binders were measured. Thermal analysis of the prepolymer–plasticizer and cured polymer mixtures showed that the synthesized plasticizers are completely compatible with the GAP binder and have a very good plasticizing effect. Furthermore, equilibrium geometry and heats of formation of each of the plasticizer molecules were obtained using the thermochemical T1 recipe, which is available in wave function Spartan software. Comparing empirical heats of combustion and calculated heats of combustion by using the heats of formation showed that the suggested optimum molecular structure by the T1 recipe has a high similarity to the real molecular structure of these molecules.
- Baghersad, Mohammad Hadi,Habibi, Azizollah,Heydari, Akbar
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- The effectiveness of ruthenium(II) complexes and ruthenium trichloride as pre-catalysts in solvent-free isomerization of model alkyl allyl ether
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The isomerization of readily available allyl ethers catalyzed by soluble ruthenium complexes is an extremely versatile methodology for synthesis of O-1-propenyl systems-attractive monomers in cationic UV-radiation curing technology. From the process development perspective, the effectiveness of selected simple ruthenium catalyst precursors, mainly [RuClH(CO)(PPh3)3], [RuCl2(PPh3)3] and RuCl3·xH2O in the solvent-free isomerization of 1,4-bisallyloxybutane has been examined. The relationship between basic reaction parameters such as the reaction temperature, the amount of catalyst precursor, the promoters of non-hydride complexes (bases or alcohols), the ambient gas atmosphere and the reaction time allowing to achieve quantitative conversion of the model bisallyl ether to its 1-propenyl derivatives (τ100%) has been presented. Particular attention has been paid to the use of lower loadings of [Ru] complex required for the completion of the reaction within the reasonable times. For the first time a detailed study on the effect of the presence and amount of allyl hydroperoxides on the course of isomerization has been done.
- Urbala, Magdalena
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- Process for producing allyl-containing compounds
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An allyl-containing compound represented by following Formula (3): wherein R2, R3, R4, R5 and R6 may be the same as or different from one another and each represent hydrogen atom or an organic group; R7 represents an organic group; and Y represents oxygen atom or sulfur atom, is produced by reacting an allyl ester compound represented by following Formula (1): wherein R1 represents hydrogen atom or an organic group; and R2, R3, R4, R5 and R6 are as defined above, with a compound represented by following Formula (2):R7-Y-H wherein R7 is an organic group; and Y is as defined above, in the presence of at least one transition element compound.
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