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Register a new userKinetics Of Reaction Of 1,10- Decanedioland Dimeric Fatty Acid C36
حركية تفاعل 1,10 -ديكان ديول مع الحمض الديميري الدسم C36
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Added by
Damascus University ورقة بحثية
Publication date
2012
fields
Chemistry
and research's language is
العربية
Authors
أحمد فلاح( باحث )
Created by
Shamra Editor
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نفذت الدراسة الحركية على التفاعل بين 1,10- ديكان ديول و الحمض الديميري الدسم C36 في الحالة المنصهرة، أُنجز التفاعل عند الدرجات .ºC 185, 170, 160, 150, 140 و جرى تعيين قرينة الحموضة للمنتج.
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.
References used
U. D. N. Bajpai, Nivedita, 1996. Plasticizing polyesters of Dimer acid and 1.4- butanediol, Chemical Engineering journal,chap22,p583-597
U. D. N. Bajpai, Kavita Singh, Nivedita, 2003. Plasticizing polyesters of dimer acid and butane diol, Journal of Applied Polymer Science, V 46, N 8, P 1485 – 1488
Anjali Bajpai, Joshy Simon, 1999. Evaluation of kinetic parameters of dimer acid based metal-containing polyesters using thermo gravimetric analysis, Thermochimica Acta, V334, N 1, P 73-87
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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.
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.
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 ′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.
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
amino nonane and dimer fatty acid C36 was carried
out in molten state, the reaction was performed at 160 ºC, the acid value, and
percentage of carboxylic functions of the product were determined. The
polyamidation reaction was found to be of overall second order until
conversion of 97% at 160 ºC, then the order of reaction changes.
حركية تفاعل الأميدة
Kinetic of polyamidation reaction
Number Average Molecular Weight
Weight Average Molecular Weight
الحمض الديميري الدسم C36
ثنائيات الأمين
ثوابت ترموديناميكية
الوزن الجزيئي الوسطي العددي
الوزن الجزيئي الوسطي الوزني
الوزن الجزيئي الوسطي اللزوجي
Dimeric fatty acid C36
Diamines
Thermodynamic constants
Viscosity molecular weight
المزيد..
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