تأثير التقوية بدقائق MgO على الصفات الحرارية والميكانيكية لراتنج الإيبوكسي

Abstract

AbstractThis research aims to, first : to increased thermal insulation to conbextra epoxy(EP-10) by additive magnesium oxide (MgO) with (5 μm) particle size as a filler withdifferent Weight percentages (10%,20%,30%) to resin and study the effect of thisadditive on thermal insulation of the resin . Fourier equation was used to calculate thechanging in thermal conductivity coefficient (k) for conbextra epoxy (EP-10) beforeand after addition of magnesium oxide ,where the results show improved thermalinsulation of the resin by reduced in thermal conductivity coefficient value after oxideaddition , and the value of thermal insulation will increased with increasing of additivepercentage of magnesium oxide ,where it change from(0.24 W/m.ºC) before addedoxide to (0.13 W/m.ºC) after addition (30%) from oxide at temperature (40 ºC) whichthe best value from oxide additive . The second : to study the mechanical behavior ofthe resin after reinforced it by the above weight percentage of magnesium oxide andstudied its effect on mechanical properties of the resin which included : impact strength, tensile strength , and compression strength . It has shown an improvement in thesemechanical properties after reinforcement by magnesium oxide where the value ofmechanical properties will increase with increasing percentage of reinforcement.Impact strength increased from(30Kj/m2) to (39Kj/m2) , and tensile strengthfrom(60Mpa)to (74Mpa), and compression strength from(132Mpa)to (146 Mpa), forreinforcing percentages 0% and 30% from magnesium oxide respectively .