الدراسة الحركية و الحرارية المقارنة للبولي أميد الناتج عن تفاعل 4,4 'ميتلن بيس (2-ميتيل سيكلوهكسيل أمين)‎ مع الحمض الديميري الدسم C36 بوجود وسيط من حمض الكبريت أو عدم وجوده

Abstract EN

Kinetic studies were carried out on the reaction between ′4,4-Methylenebis (2-methylcyclohexylamine) and dimeric fatty acid C36 in molten state by using a catalyst of sulpheric acid compared with the same kinetic of reaction without catalyst.

The reaction was performed at 150, and 160 ˚C and followed by determining the acid value of the product.The polyamidation reaction was found to be of overall a second order until equilibrium state.

Moreover, the catalyst increases speed of the reaction.

Polyamidation reaction was automatic whereas the value of free energy was negative and the reaction was endothermic, and this is shown in change of positive enthalpy values.

The kinetics of thermal degradation was studied by use of thermogravimetric analysis (TGA), and was found to be of overall a second order, and was followed by determining the thermodynamic constants of thethermal degradation reaction of the product received in the presence of catalyst.

We noticed that thermodynamic constants were lower than in the absence of catalyst.

Melting points and transitional glass in the presence of the catalyst were determined by use of differential calorimetry scanning (DSC), and was found to be higher from that in the absence of the catalyst.

The Degree of Polymerization, Number Average Molecular Weight and Weight Average Molecular Weight have been calculated during different times.

We noticed that the relationship between Degree of Polymerization and Number Average Molecular Weight, Weight Average Molecular Weight with time is linear until equilibrium state.