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Register a new userPreparation, development and characterization of Poly(lactic acid) - High density polyethylene polymer blends
تحضير و تطوير مزائج بوليميرية بولي حمض اللّبن ( PLA ) - بولي ايتيلين عالي الكثافة ( HDPE ) و توصيفها
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يهدف هذا البحث الى دراسة الخواص الريولوجية و الميكانيكية لمزائج بولي حمض اللبن (Poly lactic acid) و البولي ايتيلين عالي الكثافة (High density polyethylene) في الحالة المنصهرة تحت تأثير اجهادات القص و الحرارة، حيث تم تحضير مزائج (PLA/HDPE) بنسب مختلفة و ذلك باس تخدام خلاط داخلي.
The aim of this work is to study the rheological and mechanical properties of Poly(lactic acid) and High density polyethylene and blends (PLA/HDPE) in the molten state with recpect to shear stress, temperature and blends compositions using brabender mixer.
References used
Lundquist L, Manson J, Leterrier Y, Sunderland P (2001) Life Cycle Engineering of Plastics:Technology, Economy and Environment. Elsevier Science and Technology Books, ISBN: 0080438865
Randall.T, Das.S (1991) Plastic waste management, control, recycling and disposal. Noyes Data Corporation, New Jersey, ISBN:O-8155-1285-1
Shalaby.W.S, Karen.J.L.Burg (2005) Absorbable and biodegradable polymers. Advances in polymeric biomaterials series, CRC PRESS, Boca Raton London New York Washington, D.C. , ISBN:0-203-58651-4, Taylor&Francis e-library
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The present work covered the preparation and study of PP- LLDPE- Coconut shell powder composite materials, the determination of the optimal preparation conditions and the characterization of their physical and mechanical properties.
The aim of this work is the preparation of a biodegradable polymeric blend
(LDPE/AD+S) to be used for eco-friendly packaging purposes. The polymer matrix
consists mainly of low density polyethylene( LDPE), starch (S), and low quantities of
additiv
es (AD) as compatibilizers. The additives are: maleic acid, acetic acid, benzoyl
peroxide, and zinc stearate. The polymer blend LDPE/AD+S was prepared by extrusion, in
three compositions according to the percentage of starch (15,20,40%). Then, films were
prepared from the blend by thermal hydraulic compression to study their microstructure by
optical microscopic at magnification of 055 The results showed that the starch granules
were homogeneously distributed within the polymer matrix, and the compatibility
additives played an important role in enhancing the microstructure of the prepared blends.
The results also indicate that the starch promotes the onset of the bioegradation process.
هدفَ البحث إلى كشف احتمال حدوث هجرة متعاكسة بين المواد المضافة إلى البولي إيثيلـين عـالي
الكثافة المستخدم في صناعة عبوات تعبئة زيت الزيتون البكر و الزيت المعبـأ، و قـد صـممت التجربـة
بالاعتماد على حبيبات البولي إيثيلين من جهة للحصول على أعلى سطح تم
اس ممكن بزيـت الزيتـون،
و باستخدام نوعين منها أحدها أبيض اللون و الثاني أحمر، كما درس تأثير كل من زمـن التمـاس بـين
الحبيبات و الزيت و زمن تخزين الزيت من جهة أخرى. و لتحديد ما يجري فعلاً عند تخـزين الزيـت فـي
العبوات البلاستيكية بأبسط الطرائق، درس كل من رقم الحموضة، و رقم البيروكسيد، و لزوجـة الزيـت،
و كشف وجود مركبات الدايينات المهاجرة على موجة امتصاص UV)232nm) ، فضلاً عن دراسة العـد
الكلي للأحياء الدقيقة (لكشف احتمال وجود مثبطات نمو)، و الاختبارات الحسية. كما قيست إمكانية حدوث
هجرة للزيت إلى حبيبات البولي إيثيلين.
In the present work, the rheological and mechanical properties of
polypropylene /thermoplastic starch (PP/TPS) and acrylonitril-butadienestyrene/
thermoplastic starch (ABS/TPS) blends were investigated. Starch was
plasticized using glycerol, and b
lends were prepared using a laboratory scale
with single screw extruder. Rheological properties of the prepared blends were
determined using a capillary rheometer. Mechanical properties were studied in
term of tensile tests, stress at break, strain at break and Young's modulus were
determined.
The aim of this research is to study the absorptive effect of high density (HDPE) polyethylene pipes for the hydrocarbon compounds on the characteristic (Force, Elongation) curves. To verify this, we immerse some parts of the pipe in different hydroc
arbon mediums containing gasoline, diesel, and motor oils of (10 and 40) calibre. The result show that these compounds have a bad effect on the submission force, neck formation, and damage force. The experimental results also show that motor (engine) oils have a similar effect on gasoline despite low absorption percentages.
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