In this paper, we provide a study of the thermal decomposition behavior of epoxy and epoxy/silica nanoparticle nanocomposites by using thermogravimetric analysis and differential scanning calorimetry techniques at temperatures ranging from 25°C to 600°C, using a constant heating rate of 10°C per minute under inert atmosphere. With increasing silica nanoparticle percentages of 2%, 4%, 6% and 8%, the kinetic parameters of the activation energy, frequency factor, and thermodynamics property were determined at conversion ranges between 20% to 80% using the Coats-Redfern method for diffusion control reaction (Janders) model. The Arrhenius equation for epoxy decomposition at a heating rate of 10°Cper minute equaled 5.7278x e185.984/RT. Thermal decomposition occurred through two stages: (1) with volatile removal and (2) with a random chain break. The effects of variation of silica nanoparticle percentages on glass transition temperature was investigated. The activation energy, frequency factor, rate constant, and other thermodynamic properties increased with additional silica nanoparticle content due to more bonding, as it needed more heat to break.
In this research, a study was “1-isoquinolinyl phenyl ketone” as a corrosion inhibitor with concentrations (100, 125 150 and 200 ppm) for mild steel in acidic media as HCl acid at temperatures (25, 35 and 45 C) by using the polarization and weight loss methods. The results showed that the inhibitor is good kind especially in high concentrations for inhibitor, where inhibition efficiency increased with increasing of inhibitor concentrations and temperatures, the inhibitor is mixed type revealed, presence nitrogen and oxygen atoms in structure of inhibitor its influential role in adsorption process and formation film layer on metal. Thus study effect inhibitor concentration on thermodynamics kinetic parameters Ea, ΔH, ΔS, and ΔGads and adsorption is chemical kind.
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