REACTION KINETICS OF 1,4-DIAMINOBUTANE WITH DIMERICFATTY ACIDS

H . Mohammad; A . Falah; M . Hammoy

doi:10.24996/

Authors

H . Mohammad Department of Chemistry- Faculty of Science-Damascus University –Syria.
A . Falah Department of Chemistry- Faculty of Science-Damascus University –Syria.
M . Hammoy Department of Chemistry- Faculty of Science-Damascus University –Syria.

DOI:

https://doi.org/10.24996/

Keywords:

Dimeric fatty acid , 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 1,4-Diaminobutaneand
dimeric fatty acids in melt phase . The reaction was performed at 123, 138, 146,
160, and 170 ºC 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 28.18kJ mol-1up to 85% conversion and overall third order above 85%
conversion .The Degree of Polymerization ,Number Average Molecular Weight,
Weight Average Molecular Weight has been calculated during different times , The
relationships between Degree of Polymerization ,Number Average Molecular
Weight, Weight Average Molecular Weight with the times is linear until85%
conversion ,The Refractive index of polyamide solution was measured at different
temperatures.