الفهرس 
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Abstract
The emulsion copolymerization of styrene and acrylamide (ST& AMD) was carried out at different temperature using potassium persulphate (K2S2O8) as a free radical initiator under nitrogen atmosphere it has been found that, the initial and overall reaction rates increase with the increasing of initiator concentration as well as the monomer pair concentration.
The emulsion copolymerization of (ST-AMD) was also carried out in the presence of tetraoxaloyl urea (TOU and its cobalt and nickel complex. It was found that TOU-Co and TOU-Ni complexes have catalytic effect while TOU has an inhibition effect on the copolymerization reactions.
The initial and overall reaction rates increase with the increasing of the cobalt complex of TOU quantities while the specific viscosity values decrease. The copolymer composition is determined by the calculation of the monomer reactivity ratios (r1 & r2) which are determined in absence and presence of TOU-Co(II) complex by using two methods of calculations (fineman – Ross) and (kelen – Tudos ). By both methods the values of r1 are more than one (for styrene) but the values of r2 are less than one (for acrylamide) which indicate that the produced copolymer is block type. Also, the presence of TOU-complex in the reaction medium has no effect on the copolymer composition or on the values of r1 and r2 .
Thermodynamic activation parameters (Ea, ∆H*,∆S*) for the aqueous copolymerization reaction of ST and AMD are calculated from the relation between the log Ri vs 1/T and log K2/T vs 1/T and applying Arrhenius and Eyring equation.
The corrosion of Aluminum metal in presence of 0.5 M HCl was investigated using weight loss and poteniodynamic techniques in absence and presence of different quantities of the prepared copolymer at different temperatures. It was found that the prepared (ST-AMD) copolymer has an inhibition efficiency against corrosion of Al in acid medium (0.5 M HCl ) equal to 67.8% and the physical adsorption isotherm of the (ST-AMD) copolymer on Al surface is in good agreement with Langmiur isotherm and Frumkin isotherm.
Key words: Copolymerization, Styrene, Acrylamide, Kinetic, Organic ligand, Co-complex, Characterization and thermodynamic parameters, corrosion inhibitor , Aluminum in acid medium