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Register a new userSynthesis Polyester Amide from Oleic Acid
اصطناع بولي استر أميد انطلاقاً من حمض الأولئيك
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Tishreen University ورقة بحثية
Publication date
2020
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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تم في هذا البحث اصطناع بولي استر أميد انطلاقاً من حمض الأولئيك، يعتبر هذا البوليمير من البوليمرات المتحللة حيوياً واللدنة حرارياً ذات تطبيقات طبية وحيوية واسعة نظراً لكونها مركبات ذات بنية خطية تم التأكد من بنية البوليمير الناتج باستخدام الطرائق المطيافية المعروفة كمطيافية الطنين النووي المغناطيسي 1H-NMRومطيافية الأشعة تحت الحمراء FT-IR. وقد حصلنا على هذا البوليمير بمردود جيد (78)%.
In this article, a polyester amide was synthesized from oleic acid. This polymer is a biodegradable and thermoplastic polymer, with wide medical and biological applications due to its being compounds with a linear structure. The polymer structure has been confirmed. Output using spectroscopy methods known as 1H-NMR, and FT-IR spectroscopy. And we obtained this polymer with a good yield (78%).
References used
Metzger, J. O., Bornscheuer, U., Lipids as renewable resources: current state of chemical and biotechnological conversion and diversification, Applied Microbiology and Biotechnology. 2006, 71, 13-22
Miao, S. D., Wang, P., Su, Z. G., Zhang, S. P., Vegetable-oil-based polymers as future polymeric biomaterials, ActaBiomaterialia. 2014, 10, 1692-1704.
Alagi, P., Hong, S. C., Vegetable oil-based polyols for sustainable polyurethanes, Macromolecular Research. 2015, 23, 1079-1086.
de Espinosa, L. M., Ronda, J. C., Galia, M., Cadiz, V., A new route to acrylate oils: crosslinking and properties of acrylate triglycerides from high oleic sunflower oil, Journal of Polymer Science Part a-Polymer Chemistry. 2009, 47, 1159-1167.
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Oleic acid is a fatty acid known as omega-9, which is found naturally in many plant
sources and animal products and is found in the form of tri-glycerides (oleic acid esters). In
this research, the oleic acid was isolated and purified with a high d
egree of purity up to
99% of the fatty acids extracted from olive oil, corn oil and palm oil with a yield of at least
87% of its percentage in the oils used by the use of crystalline urea as well as crystalline
selective cooling . GC-FID was also used for direct quantitative analysis of oleic acid and
other fatty acids.
The recent synthesis of the new polymers has been profoundly affected by
the unique characteristics of Dimer Acid.
These polymers were made up following the condensation with
triethanolamine when was treated in melted phase.
We performed identifi
cation of the physical characteristics of the polymers
such as the molecular weight, in addition to the acid value and hydroxyl value.
Infrared spectroscopy have been used in identification of this polymer.
Also, the rheological behavior has been assessed thermally and shearing
stress by using capillary viscometer.
Our results revealed a reduction in the viscosity with increase of the
shearing stress as will as with rise in the temperature.
This research focuses on an environmental and economic aspect, as it depends on using the harmful water hyacinth weed as an effective material to product the biopolymer "polyhydroxybutyrate: PHB" by Bacillus subtilis. The samples were processed and d
igested to extract the polymer polyhydroxybutyrate (PHB) using chloroform method. Some tests were carried out to confirm the identity of this polymer, such as measuring the melting point of the product and studying the functional groups of the extracted PHB using the Fourier-transform infrared spectroscopy (FTIR). The results obtained by the extracted polymer from the water hyacinth weed showed conformity to the referential PHB polymer tests, which shows the importance of this research in determining a way to get rid of this harmful weed, which is an environmental problem and a large economic burden by investing it in the production of biopolymer PHB.
A partial purification was performed for the fungal hydroxycinnamic acid
esterase (HCAE) from Humicola sp. by precipitation using either ammonium
sulfate or acetone.
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.
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