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Register a new userThe Relationship Between the Cross-Linking Irradiation Doses of Polyethylene and their Mechanical Properties
تأثير جرعات التشبيك الإشعاعي في الخواص الميكانيكية للبولي أتلين
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يتم استخدام البولي أتلين المشبك في كابلات التوتر المتوسط و العالي بصورة متزايدة كبديل عن المواد العازلة الزيتية و الورقية . و يعد تشعيع مواد البولي أتلين منخفض الكثافة من الطرائق الملائمة لعمليات تشبيك الجزيئات بدلا من الطرائق الكيميائية. يهدف هذا البحث إلى إيجاد العلاقة بين أهم الخواص الميكانيكية لعينات مخبرية من البولي أتلين و الجرعات الإشعاعية المستخدمة في عمليات التشبيك. و سيتم في هذا البحث استعراض أهم النتائج التي تم التوصل إليها.
The use of cross-linking polyethylene was increased, especially for the medium & high voltage electrical cables instead of paper and oil insulating materials. The radiated low density polyethylene is the best technique in the process of cross-linking instead of chemical method. The purpose of this study is to find the relation between mechanical properties of polyethylene samples and the dose rate of irradiation to cross – link the polyethylene materials and to get the best properties. This paper illustrates also the important results, that we have obtained in this study.
References used
James E.Mark, " Physical Properties of Polymer Handbook " , 1996
K.Dawes and L.C.Glover , " Effect of Electron Beam and - Irradiation on Polymeric Materials " 1996
L.A.Utracki , " Commercial Polymer Blends " , 1998
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This search aims to study the effect of additive materials ( Ethyl Methyl Keton
Peroxide MEKP , Cobalt Naphthenate ) at the important values of (stress-strain) curves
( stress and elongation at break ) for the preparing specimens from reinforced an
d nonreinforced
with fiber glass unsaturated polyester resin.
The result showed that the investigated parameters are clearly affected with using
additive materials and the optimum concentration for non-reinforced specimens which was
curing in room temperature was (1% MEKP + 1% Cobalt Naphthenate) and (0.8% MEKP
+ 1% Cobalt Naphthenate), and for reinforced specimens with fiber glass was:( 1% MEKP
+ 0.8% Cobalt Naphthenate) and ((0.2-0.4) % MEKP + 1% Cobalt Naphthenate).
The results showed also that it is possible to get the better values of tensile stress at
break when the specimens was curing in oven at 100 Cº and treated at this temperature for
15 min.
The results showed the possibility of getting at a wide rang of board with different properties, and all investigated percentage had special properties which to use in industrial application, also the result showed the possibility to produce these bo
ard without pretreatment of particles wood or without addition any virgin plastic to RLDPE
The results showed the possibility of getting of a wide spectrum of boards with different properties, and all studied percentages had special properties which allow them to use in industrial application, also the result showed the possibility to produce these boards without treatment of the wood particles or without addition any virgin plastic to RLDPE
As a result of the development of the use of reinforced Composites with fibers in
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e samples prepared
from unsaturated polyester resin reinforced with glass fiber used in wind turbine blades
manufacturing, and also studying the effect of for the application of heat treatment
operations on the hardening of the unsaturated polyester and tensile properties after heat
treatment process the application in order to improve the properties of these blades.
Test samples were prepared containing ratios (1% - 1.5% - 2%) of methyl Etel
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treatment results showed that the best values for tensile strength at break of the samples are
treated to a time of / 48 hours /.
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times (1,3,5 h), and thus obtained six samples differ in
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