Do you want to publish a course? Click here

Synthesis of new polyester (Dimer acid / Triethanolamine) Study of Some Physical and Chemical properties

تحضير بولي إستر (الحمض الديمري / تري إيتانول أمين) و دراسة بعض خواصه الفيزيائية و الكيميائية

2778   1   16   0 ( 0 )
 Publication date 2003
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

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 identification 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.


Artificial intelligence review:
Research summary
تناولت هذه الدراسة تحضير بوليستر جديد باستخدام حمض الديمر وثلاثي إيثانول أمين عن طريق تفاعل التكثيف في الحالة المنصهرة. تم تحديد الخصائص الفيزيائية والكيميائية للبوليمرات المحضرة، بما في ذلك الوزن الجزيئي، قيمة الحمض، وقيمة الهيدروكسيل. كما تم استخدام التحليل الطيفي بالأشعة تحت الحمراء لتحديد هوية البوليمر. تم تقييم السلوك الريولوجي للبوليمرات من خلال قياس اللزوجة باستخدام مقياس اللزوجة الشعري. أظهرت النتائج انخفاضًا في اللزوجة مع زيادة الإجهاد القصي وارتفاع درجة الحرارة.
Critical review
دراسة نقدية: تعتبر هذه الدراسة مهمة في مجال الكيمياء البوليمرية حيث تقدم معلومات قيمة حول تحضير بوليستر جديد وتحديد خصائصه الفيزيائية والكيميائية. ومع ذلك، كان من الممكن تحسين الدراسة من خلال تقديم تفاصيل أكثر حول التطبيقات المحتملة لهذا البوليمر الجديد في الصناعات المختلفة. كما أن الدراسة لم تتناول بشكل كافٍ تأثير المتغيرات البيئية على استقرار البوليمر، وهو جانب مهم يجب مراعاته في الأبحاث المستقبلية.
Questions related to the research
  1. ما هو الهدف الرئيسي من هذه الدراسة؟

    الهدف الرئيسي هو تحضير بوليستر جديد باستخدام حمض الديمر وثلاثي إيثانول أمين وتحديد خصائصه الفيزيائية والكيميائية.

  2. ما هي الطرق المستخدمة لتحديد خصائص البوليمر في هذه الدراسة؟

    تم استخدام التحليل الطيفي بالأشعة تحت الحمراء ومقياس اللزوجة الشعري لتحديد الخصائص الفيزيائية والكيميائية للبوليمر.

  3. ما هي النتائج الرئيسية التي توصلت إليها الدراسة؟

    أظهرت النتائج انخفاضًا في اللزوجة مع زيادة الإجهاد القصي وارتفاع درجة الحرارة.

  4. ما هي الاقتراحات لتحسين هذه الدراسة في المستقبل؟

    يمكن تحسين الدراسة من خلال تقديم تفاصيل أكثر حول التطبيقات المحتملة للبوليمر الجديد ودراسة تأثير المتغيرات البيئية على استقراره.


References used
(Harrison S. A., Peterson L. E., and Wheelo D. H. J. Am. Oil Chemi. Soc. 42, 2 (1965
(N.C. Billingham, Molar Mass Measurements in Polymer Science Kogan (1977
(F. G. MANN and B. C. SAUNDERS, Practical Organic Chemistry longman Fourth Edition (1975
rate research

Read More

The effect of clay soil treatment with two levels of tobacco west compost and organic fertilizer (15 and 30 ton/ h), in addition to mineral fertilizer treatment, with three replicates of each treatment on some physical properties (Aggregate size di stribution, main weight diameter, bulk density and porosity) and chemical properties (Organic carbon, humic and volvic acid and humification index for big and small soil aggregates was studied. The results showed that tobacco west compost and organic fertilizer were effective in increment of soil content of organic carbon, which reached (20 and 26%) for organic fertilizer, and (39 and 45%) for compost compared to the control, conducing to ameliorate soil physical properties, where The main weight diameter, stable aggregate rate and soil porosity were increased. Whereas, bulk density decreased significantly in both treatments compared to the control. Compost treatment affect soil physical properties more than organic fertilizer.Mineral fertilizer decreased soil content of organic carbon compared to the control. Humic and volvic acids contents were between 2.12 and 74.3 mg/kg aggregates in the control,and compost treatments alternatively in macro aggregates (> 2mm). Wile, volvic acid values were between 0.93 mg/kg in control for small aggregates (< 0.25), and 3.17 mg/kg aggregates in mineral fertilizer treatment for (0.25 – 2) aggregates. Humification index values were less than 2 in macro aggregates, while it was bigger than 2 in small aggregates.
This research was conducted in Agriculture College (Food Science Dep., Damascus U university). The purpose of this research was to evaluate Cherkes Cheese by determination some Chemical and microbial properties for 40 samples collected randomly fr om different places Damascus and country sides. The results showed very deferent changes in Chemical properties. The acidity ranged between (0.25 - 0.54%), moisture content (38 - 56%), and total dry matter (44 - 62.7%). Results also showed that all samples were rejected by (Syrian Normal Standard)for fat content in dry matter (20 -33%). Fifty percent of samples were rejected for their content of sodium chloride which was (1.2 - 4.3%). Results also showed that samples were free of Salmonella and there was no rejection for existence of Staph. aureus but 37.5 % and 10% of samples were rejected by (Syrian Normal Standard)as per content of coliform and E.coli, respectively.
This research includes an experimental study for the manufacture of a composite material based on polymer (unsaturated polyester), reinforced with random fiberglass at different weight fractions. By suite, it has been studied some mechanical prope rties of the models manufactured, to determine the effect of glass fiber content on the tensile strength, hardness and impact resistance. This study has shown that the best results were for samples reinforced by 40% fiberglass, where the tensile strength increased about 70%, hardness up to 30%, and impact resistance about 43%. It will be observed that the mechanical properties decrease clearly at 60% of weight fraction of fiberglass. This fact can be related to the quantity of unsaturated polyester become inadequate for recharge of the fibers, which leads to weakness in the forces bonding in composite materials.
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%).
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا