نفذت الدراسة الحركية على التفاعل بين الحمض الديميري الدسم C36 مع 1.3 ثنائي أمينو البروبان
و 1.4 ثنائي أمينو البوتان و 1.6 ثنائي أمينو الهكسان و 1.8 ثنائي أمينو الاوكتان، كلٌّ علـى حـدة، فـي
الحالة المنصهرة، أنجز التفاعل عند الدرجة (145ºC .( وجد أن تفاعل الأميدة كان من المرتبـة الثانيـة
حتى نسبة تحول %83 من أجل تفاعل الحمض مع 1.3 ثنائي أمينو البروبان، و نسبة تحول% 86 مـن
أجل تفاعل الحمض مع 1.4 ثنائي أمينو البوتان، و نسبة تحول %87 من أجل تفاعل الحمض مـع 1.6
ثنائي أمينو الهكسان و 1.8 ثنائي امينو الاوكتان، ثم تتغير مرتبة التفاعل إلى المرتبة الثالثة فوق النـسب
السابقة.
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 reaction 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.
References used
Averous, L. Hablot, E. Matadi, R. Ahzi, S. (2010). Renewable biocomposites of dimer fatty acid –based polyamides with cellulose fibres: thermal, physical and mechanical properties , Compos Sci andTechnol,70:504-509
Brandrup, J. Immergut, EH. Grulke, EA. Abe, A. Bloch, DR. (1999). Polymer hand book; Wiley-Interscience:.4thed.New-york
Braun, D. Cherdron, H, Ritter, H. (2001). Polymer synthesis: theory and practice, Springer –verlag berlin Heidelberg New York,p221
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
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.
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
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
Study the kinetics degradation of poly (dimeric acid C36 with 1.9 – diamino
nonane) was carried out by thermal analysis (TGA), and thermodynamic and
equilibrium constants have been defined, moreover, study the kinetics of
reaction between 1.9 – di