حضر بولي أميد دسم بالتفاعل بين الحمض الديميري الدسم C36 مع 1,5 - ثنائي أمينو البنتان في الحالة المنصهرة، أنجز التفاعل في الدرجة 110 C˚ دون حفاز، ثم بالحفز بكل من (حمض الفسفور، و حمض الكبريت، و ثناني أكسيد المنغنيز)، نُفّذت الدراسة الحركية على التفاعل، و عين العدد الحمضي للمنتج و قد وجد أن تفاعل الأميدة كان من المرتبة الثانية حتى نسبة تحول % 59, ثم تتغير مرتبة التفاعل. و وجد أن الحفاز يزيد من سرعة التفاعل، و أن ثنائي أكسيد المنغنيز هو أفضل الحفازات المستخدمة.
عينت درجة البلمرة و كل من معدل الوزن الجزيئي العددي و الوزني خلال أزمنة مختلفة، و لوحظ أن علاقة كل مما سبق بالزمن علاقة خطية حتى درجة تحول 59%, و ذلك عند الحفازات المستخدمة كلها، تحقق معدل وزن جزيئي عددي وزني مرتفع باستخدام حفاز ثنائي أكسيد المنغنيز.
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 study 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.
References used
Ebewele, R.O., 1996. Polymer science and technology, University of Benin .Nigeria. P161
Chen, X., Zhong, H., Jia, L., Ning, J., Tang ,R., Qiao ,J., Zhang, Z., 2002. Polyamides derived from piperazine and used for hot-melt adhesives; Synthesis and properties. Int ,J.Adhes,22:75-79
Brydson, J. A., 1999. Plastics Materials, University of North London, p 478- 480
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.
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
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
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