Kinetics of Reaction of 4.4′ Methylenebis (2-Methelcyclohexylamine) and Dimeric Fatty Acid C36 PDF

Keywords

Dimeric fatty acid C36, Diamines, Kinetic of polyamidation reaction, Degree of Polymerization, Number Average Molecular Weight, Weight Average Molecular Weight

Abstract

Kinetic studies were carried out on the reaction between 4،4′-Methylenebis (2-methylcyclohexylamine) and dimeric fatty acid C36 in melt phase .The reaction was performed at 144˚C, 150˚C, 165˚C, 170˚C, and 185˚C and followed by determining the acid value of the product. The polyamidation reaction was found to be of overall second order with an activation energy of 58،61 k J ∕ g mol up to 75% conversion and overall third order above75% conversion .The Degree of Polymerization ،Number Average Molecular Weight and Weight Average Molecular Weight have been calculated during different times, the relationships between Degree of Polymerization and Number Average Molecular Weight، Weight Average Molecular Weight and the times is linear until 75% conversion at all temperatures.