The thermodynamic theory of instability shows that a reacting system with a first order exothermic reaction in a continuously stirred tank reactor (CSTR) can be destabilized under certain conditions. On the other hand thermodynamic analysis shows that the reactor is always stable if an endothermic reaction occurs. Combustion instability in solid propellant rockets using ammonium perchlorate (AP) as an oxidizer, has been examined in the light of current ideas of nonequilibrium thermodynamics. It has been shown that the decomposition of AP, which is autocatalytic, can destabilize the system under certain conditions.
The main aim of this work is to explore the Nanocomposites for industrial and engineering applications. Nanocomposites or nanofillers are bringing exemplary changes in the field of material science and polymer composites. In this complicated process a minor part of material is added to a variety of polymers and other materials which can improve the performance and quality of materials including mechanical, thermal, flexural stiffness, tensile strength, toughness, water absorption, flame retardancy and scratch resistance etc. This paper is concerned with investigation of the mechanical properties on composite material made of E-Glass fibre and LY556 epoxy with induced nanoparticles under tensile load. The tensile tests carried out on different composite samples as per the ASTM standard.
Objectives: To find the suitable solvent for the oxidation of methionine by Cr(VI) reagents using EDAS and TOPSIS method. Methods: When methionine oxidized by Cr(VI) complexes i.e. tetrakis(pyridine)silver dichromate (TPSD), quinolinium bromochromate (QBC), tetraethylammonium chlorochromate (TEACC) and quonilinium chlorochromate (QCC) formation of corresponding sulfoxide take place. Reaction performed in chloroform (CF), 1,2dichloroethane (DCE), dichloromethane (DCM), dimethylsulphoxide (DMSO) and acetone solvents. Findings: Reaction is fastest in DMSO and slowest in acetone for the oxidation of methionine in the following-DMSO, DCE, DCM, acetone, CF. Novelty: Solvent effect is investigated using the rate constant k 2, by EDAS and TOPSIS methods.
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