نُفّذت أولاً الدراسة الحركية على التفاعل بين 4,4 ' ميتلن بيس ( 2- ميتيل سيكلوهكسيل أمين) و الحمض الديميري الدسم 36 C في الحالة المنصهرة باستخدام وسيط من حمض الكبريت و قورنت بحركية التفاعل نفسه وذلك دون استخدام وسيط، أنجز التفاعل في درجتي حرارة ( 160.150ºC) و جرى تعيين
قرينة الحموضة للمنتج، و قد وجد أن تفاعل الأميدة كان من المرتبة الثانية حتى الوصول إلى حالة التوازن الكيميائي. كما أن الوسيط زاد من سرعة التفاعل. تفاعل الأميدة تلقائي إذ إن قيمة تغير الطاقة الحرة سالبة و هو ماص للحرارة، و هذا ما توضحه قيم تغير الانتالبية الموجبة.
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.
References used
(Shehap. A. M. (2008). Thermal and Spectroscopic studies of polyvinyl Alcohol/ Carboxy Methyl celluloses Blends. Egypt. J. solids, vol (31). No (1) (75-91
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 and Technol. 70:504-509
Brandrup, J. Immergut, EH. Grulke, EA. Abe, A. Bloch, DR. (1999). Polymer hand bock; Wiley-Interscience: 4thed. New-york
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
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
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
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