A study on the effect of the hardener on the mechanical properties of the epoxy resin
مقدم أطروحة جامعية
مشرف أطروحة جامعية
Abd al-Razzaq, Adnan A.
Salih, Najat Jumah
الجامعة
الجامعة التكنولوجية
الكلية
-
القسم الأكاديمي
قسم الهندسة الكيمياوية
دولة الجامعة
العراق
الدرجة العلمية
ماجستير
تاريخ الدرجة العلمية
2010
الملخص الإنجليزي
Triethylene tetra mine (TETA) and diamino diphenyl methane (DDM) were prepared with different hardener / resin ratios, (under stoichiometry, stoichiometry and above stoichiometry) and their mechanical properties; cure kinetics and rheology were investigated by using mechanical tests, thermal and rheological analysis.
Impact strength, tensile strength, hardness, flexural strength, compression strength and bending strength were measured through using mechanical tests instruments.
The tests were carried out at room temperature.
For DGEBA/TETA system the tests were done on four hardener / resin ratios (10, 13, 15 and 20) phr and for DGEBA/DDM system the hardener/resin ratios were four also ; (24, 27, 30 and 34) phr.
The results showed that the above stoichiometry ratio formulation (15 phr for DGEBA / TETA system and 30 phr for DGEBA/DDM system) gave the best mechanical properties.
While the DGEBA/DDM system showed better mechanical properties than the DGEBA / TETA system From dynamic and isothermal runs of the DGEBA / TETA system for three hardener / resin ratios (5, 13and 20) phr, the cure kinetics at four temperatures (30, 45, 60 and 80) °C was analyzed by a differential scanning calorimetric (DSC).
The isothermal cure process was simulated with the four-parameter autocatalytic with diffusion model (modified Kamal’s model).
The fitted results agreed well with the experimental values in the late and early cure stages.
The results showed that the stoichiometric ratio (13 phr) reaches complete cure (α = 1) at 80 °C.
Viscosity (η) of DGEBA / TETA system was measured through curing using a Brookfield viscometer at four different temperatures (30, 45, 60 and 80) °C.
The measurements were carried out for three hardener / resin ratios (5, 13 and 20) phr.
The gel time (tgel) was calculated for each hardener / resin ratio formulation; from the viscosity experimental data.
The results showed that the gel time decrease with increasing curing temperature for each hardener / resin ratio formulation.
Viscosity profiles were described by a model based on the Boltzmann function.
The fitted results agreed well with the experimental values.
التخصصات الرئيسية
الموضوعات
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Aziz, Maryam Imad. (2010). A study on the effect of the hardener on the mechanical properties of the epoxy resin. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-305043
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Aziz, Maryam Imad. A study on the effect of the hardener on the mechanical properties of the epoxy resin. (Master's theses Theses and Dissertations Master). University of Technology. (2010).
https://search.emarefa.net/detail/BIM-305043
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Aziz, Maryam Imad. (2010). A study on the effect of the hardener on the mechanical properties of the epoxy resin. (Master's theses Theses and Dissertations Master). University of Technology, Iraq
https://search.emarefa.net/detail/BIM-305043
لغة النص
الإنجليزية
نوع البيانات
رسائل جامعية
رقم السجل
BIM-305043
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر