Fattypolyamide was prepared by reaction of (1,5-Diamino pentane) with
dimeric fatty acid C36 in molten state. The reaction was performed at 110 C˚
without catalyst, then with (Phosphoric acid, Sulphoric acid and Manganese
dioxides). The Kinetic st
udy was carried out on the reaction and followed by
determining the acid value of the product. The polyamidation reaction was
found to be on the overall a second order up to 59% conversion. Then the
reaction order changes. We found that the Catalyst increases the velocity of the
reaction with manganese dioxides the best Catalyst. 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 with times are linear
until 59%conversion at 110˚C with used catalysts. The highest (N.A.M.W) and
(W.A.M.W) was accomplished with the Catalyst MnO2.
Kinetic studies were carried out on the reaction between 1,10–
Decanedioland dimeric fatty acid C36 in melt phase. The reaction was
performed at 140, 150, 160, 170, and 185ºC and followed by determining the
acid value of the product.
Kinetic studies were carried out on the reaction between dimeric fatty acid
C36 with 1.3 Diamino propane and 1.4 Diamino butane and 1.6 Diamino hexane
and 1.8 Diamino octane in molten phase. The reaction was performed at 145ºC.
The polyamidation r
eaction was found to be on the overall a second order up to
83% conversion for reaction dimeric fatty acid C36 with 1.3 Diamino propane
and 86% conversion for reaction dimeric fatty acid C36 with 1.4 Diamino
butane and 87% conversion for reaction dimeric fatty acid C36 with 1.6
Diamino hexane and 1.8 Diamino octane then the reaction order changes to the
third order above last conversion. The degree of polymerization,number
average molecular weight and weight average molecular weight have been
calculated during different times. Their relationships with the times are linear
until last conversion. The melting point and thermodynamic constants for
melting are determined by use of differential scanning calorimetry DSC. The
melting point and thermodynamic constants increase by increasing the length
of reacted amine series.
Kinetic studies were carried out on the reaction between 2-Methyl 1,5
diaminopentane and dimeric fatty acids in melt phase. The reaction was
performed at 113, 130, 140, 155, and 164 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 45.48 k cal⁄g mol up to (52, 57,
79, 80, 86)% conversion at (113, 130, 140, 155, 164) ºC and overall third order
with an activation energy of 43.73 k cal⁄g mol above (52, 57, 79, 80, 86)%
conversion at (113, 130, 140, 155, 164) ºC.
