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Register a new userPrepartion of Polypropylene- Polyethylene Natural Fibers Composites
تحضير مواد مركبة بولي بروبيلين- بولي إيتيلين ( LLDPE – PP ) مقواة بواسطة ألياف طبيعية و توصيفها ميكانيكياً و ريولوجياً
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جرى في هذا العمل تحضير مواد مركبة من مزائج بوليميري البولي بروبيلين و البولي إيتيلين الخطي منخفض الكثافة ( PP - LLDPE ) و مسحوق شور جوز الهند (coconut shell powder) و دراستها و تحديد الشروي المثلى لتحضيرها و توصيفها من الناحية الفيزيائية و الميكانيكية و الريولوجية.
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.
References used
Andrew J. Peacock; Allison R. Calhoun. Polymer Chemistry: Properties and Applications. Hanser Verlag (2006)
J.Alrifai and F.Suwailem, Pplymers composition ana characteristics, Petrochemical Research Institute, King Abdul Aziz City for Science Technology, KSA,(2011)
H. Elias. An Introduction to Polymer Science. VCH Publishers, Weinheim (1997)
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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.
This chapter addresses the grounds behind performing this work which could be summarized in identifying the technological processes to manufacture laboratory samples from unfilled Teflon and composite materials: Teflon+ Carbon Black and characterizin
g these samples structurally , mechanically and electrically in order to master this powder based Teflon technology.
This contributes to the transfer of this technology to the Syrian industrial and economical environment for the production of filled and unfilled PTFE parts and carbon black- PTFE composite materials meeting the required quality levels and establishing scientific and technological guidelines for this technology.
This chapter addresses the grounds behind performing this work which could be summarized in identifying the technological processes to manufacture laboratory samples from unfilled Teflon and composite materials: Teflon+ Carbon Black and characterizin
g these samples structurally , mechanically and electrically in order to master this powder based Teflon technology.
This contributes to the transfer of this technology to the Syrian industrial and economical environment for the production of filled and unfilled PTFE parts and carbon black- PTFE composite materials meeting the required quality levels and establishing scientific and technological guidelines for this technology.
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.
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.
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