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Register a new userStudy the Effect of Reinforcing on Chemical and Mechanical Properties of Polymer composite from Epoxy and Novolac
دراسة تأثير التدعيم على الخصائص الميكانيكية و الكيميائية للراتنج المشترك من الايبوكسي و النوفولاك
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تم في هذا البحث تحضير مواد متراكبة هجينة , المادة الأساس فيها هي مزيج من راتنج الايبوكسي و راتنج الفينول فورم الدهيد ( نوع نوفولاك ) تم تدعيمه بمساحيق الألومينا و السيليكا و ألياف الأسبستوس بنسبة وزنية 30%.
In this work composite hybrid materials were prepared from a base material composed of epoxy and phenol - form aldehyde resins and reinforced by 30% wt alumina and silica powders and asbestos fibers. For samples were prepared with. Different ratio of reinforcing material.
References used
AKRAM, Mummed 1984- Physical Chemistry of Polymers .University of Mosul, Iraq, 210p
NASSER, Ali 1999 - The bases of organic compounds Chemistry Department. University of Aleppo, Syria, 186p
C.M. Blow, 1981 - Rubber Technology and manufacturing. Institute of Rubber Industry IRI, Germany, 150p
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In this research work, an epoxy polymer- Carbon Black composite has been
prepared and characterized regarding the effects of adding carbon black to
epoxy polymer on some structural properties such as polymerization behavior,
cross-linking reaction
time and yield and some properties e. g. glass transition
temperature (Tg), Young modulus (E) and flexural strength (σ).
The cross-linking reaction and glass transition temperature were studied by
Differential Scanning Calorimetry (DSC), and the mechanical tests were done
by Universal Testing Machine.
The effect of different treatments on carob seed germination was studied.
The results showed that, seed scarification was the most effective method in
increasing germination rate as well as the use of concentrated sulfuric acid for 30 minutes
reac
hing 100%, followed by the treatment with alcohol for 60 minutes, and immersing
seeds in hot water for 60 minutes.
The results also indicated that the speed of germination when seeds were scarified
was the best (I.D.=14.5), followed by the treatment with concentrated sulfuric acid for 30
minutes (I.D.=21.5), alcohol for 60 minutes (I.D.= 38) and immersing seeds in hot water
for 60 minutes (ID.=60).
This study includes an experimental work to determine the effect of ultraviolet radiation (uv-rays) on the mechanical behavior of the conveyor rubber vulcanizing, which used in various transport operations, and in the cement plant Tartus. In this wor
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ractical experiences were carried out in the powdery saturation milieu to form a diffusion coating layer containing atomic chromium who will spread inside the painted
surface, and has studied some mechanical and chemical properties after doing diffusion chrome coating.
The tests results showed that the tensile strength and micro hardness and chemical corrosion resistance improved after the diffusion chrome coating, also increased the depth of coating layer By increasing the retention time in the oven and temperature, where this relationship is reflected with curve of the second degree. Conversely ductility decreased.
Search results confirm the possibility of using diffusion chrome coating as a promising treatment in raising the efficiency of machinery elements that prone to oxidation or chemical corrosion in different temperatures.
The research was carried out in the center of the Research and
Improvement of Sheep and Camels in salamiah. The study was
conducted on 9 female camels, within semi-open barns, semiintensive
care system, and the camels were fed on mixtures of
barl
ey, vetch and some concentrated fodder, Fodder mixtures were
determined to suit the nutritional needs of the physiological and
age-related condition of the study. The herd was also applied to the
preventive vaccination system according to the preventive immunity
program.
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