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Register a new userدراسة بعض الخواص الطيفية و الميكانيكية لمزيج عديدي التكاثف بولي إيبوكسي + بولي فينوكسي
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Damascus University ورقة بحثية
Publication date
2006
fields
Physics
and research's language is
العربية
Created by
Shamra Editor
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اهتمت هذه الدراسة بتطوير صناعة مواد بوليميرية جديدة، و نظراً للأهمية الكبيـرة لعديـد التكـاثف البولي إيبوكسي، قمنا بدراسة قساوته عندما يكون نقياً، و من ثم شكّلنا خلائط منه مع عديد تكاثف آخـر هو البولي فينوكسي بنسب محددة مختلفة، كما قمنا بتشكيل صفائح كومبوزيت من الخلائط السابقة مـع ألياف الزجاج تارة و الألياف الصخرية تارة أخرى و حددنا قساوتها. رافقت دراسة القساوة للعينات السابقة، دراسة لأطيافها ما تحت الحمراء و ذلـك لمقارنـة التركيـب بالقساوة، هذا و نوقشت تطبيقات هذه المادة في الحياة العملية أيضاً.
No English abstract
References used
Lyman, D. J. (1972). “Step Growth Polymerization“. d.h solmon editor vol 3.95
Sanunders, J. H. (1975). High Polymer k. c. Frisch, s. c. reegen Editors Vol 16, part 1. “polyurethanes chemistry and technology
Camberlin, Y., Pascault, J. P. (1994). J. Die. Makromol.chem 350, 32
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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 work, several samples of poly(propylene itaconat ortho
phthalate) based on itaconic acid and 1,2-propylene glycol were
prepared by polycondensation.
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.
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.
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.
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