پديد آورنده :
صادقي بروجردي، محسن
عنوان :
بهبود در چسبندگي فصل مشترك كامپوزيت هاي اپوكسي/ الياف UHMWPE به روش اصلاح شيميايي سطح
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي شيمي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مهندسي شيمي
صفحه شمار :
يازده،78ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
محمود معصومي
توصيفگر ها :
مونومرGMA , خواص مكانيكي
تاريخ نمايه سازي :
27/10/89
استاد داور :
روح الله باقري، مرتضي صادقي
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Improvement in Interfacial Adhesion of Epoxy UHMWPE fiber Composites by Chemical Treatment of Surface Master of Science Mohsen Sadeghi Broujerdi m sadeghi@ce iut ac ir Isfahan University of Technology Department of Chemical Engineering Supervisors Mahmood Masoomi mmasoomi@cc iut ac ir Ali Zadhoush zadhoush@cc iut ac ir Submitted 6 July 2010 Language Persian Abstract In this study improving the interfacial adhesion of epoxy polyethylene fiber UHMWPE composites by grafting glycidyl methacrylate GMA on the surface of the fiber has been investigated For grafting process design of experiments was used and two factors of monomer concentration and reaction time were selected as the process variables After grafting process the results of grafting percentage has been analyzed Then the ATR IR test has been done to approve the presence of GMA groups on polyethylene chains After that changes in interfacial adhesion was measured by pull out test to determine the effect caused by surface modification of fibers Also to evaluate the effect of surface modification process on mechanical properties of composites samples of unidirectional UHMWPE fiber epoxy composites were prepared and tested by tensile and bending methods Then tensile fracture surfaces of samples were studied by scanning electron microscopy The results showed that the grafting percent increases by increasing monomer concentration and reaction time However the effect of monomer concentration on grafting percentage is clearly greater than the reaction time In addition a quantitative relation between grafting percentage and two factors of monomer concentration and reaction time were obtained using the software In pull out test Interfacial Shear Strength IFSS of epoxy treated fibers was increased The IFSS of epoxy and fibers grafted with 11 25 and 40 GMA is respectively 126 195 and 220 of untreated fibers The results of mechanical tests showed that in samples made with 11 grafted fibers tensile strength and work up to break were increased 10 and 36 compared to untreated fibers but in samples with 25 and 40 grafted fibers tensile strength and work up to break decreased In the bending test flexural strength and flexural modulus of samples made from 11 and 25 grafted fibers didn t change considerably compared to the samples made from untreated fibers but in samples made from 40 grafted fibers reduction in fiber strength and flexural modulus is observed Meanwhile all macroscopic and microscopic fracture surfaces of tensile and bending test samples show that fracture behavior of composites goes to brittle fracture by increasing the grafting percent Keywords UHMWPE fiber epoxy matrix surface treatment GMA pull out test mechanical properties
استاد راهنما :
محمود معصومي
استاد داور :
روح الله باقري، مرتضي صادقي
