Materials Engineering Department at the University of Technology awarded a master's degree to the student Rawnaq Muhammad Ali / Department of Materials Engineering / University of Technology for her thesis tagged
"Experimental investigation of Denture Base Material made from Polymeric Composite Materials"
Whereas, the discussion took place in the graduate studies hall in Building B in the department on Sunday, 11/6/2023 at 9:00 A.M, and the discussion committee consisted of Messrs:
- Prof. Dr. Kadhum M. Shabeeb (Chairman).
- Prof. Dr. Nassier A. Nassir (supervisor).
- Dr. Basma H. Al-Tamimi (supervisor).
- Dr. Jawad K. Oleiwi (member and supervisor).
- Prof. Dr. Qahtan A. Hamad (member and supervisor).
As well as scientifically evaluating the thesis by Prof. Dr. Basim A. Abbas/ University of Babylon/ Department of Mechanical Engineering, and Prof. Dr. Ahmed Adnan Abdul Jabbar/ University of Technology/ Department of Mechanical Engineering, and linguistically by Lec. Dr. Ali A. Muhsan / University of Technology/ Department of Materials Engineering. After the discussion committee recorded its observations on the thesis, which were distributed between explanation, correction, and the student's defense of her thesis. At the end of the discussion, the committee decided to evaluate the thesis, and decided to award the student a master's degree with a full grade.
The research aimed to develop the properties of denture base made of PMMA by using reinforced natural powders (hazelnut and almond shells). The experimental part included mechanical tests (tensile, max. shear stress, Impact, flexural, hardness and surface roughness). The physical tests were conducted including density, water Absorption and DSC, FTIR analysis for miscibility properties. The results showed that as the weight fraction of reinforcing hazelnut and almond shells increased, the tensile strength, elongation percentage, maximum shear and density all dropped. The flexural strength, Impact strength, hardness and fracture toughness were increased with increasing the weight fraction of reinforcing materials and also surface roughness, water absorption. In FTIR test there is no change in peak magnitude or peak shift for PMMA composite specimens when the addition of hazelnut or almond shell powder. In DSC the glass transition temperature (Tg) of PMMA composites strengthened by hazelnut or almond shell powders increased as the weight fraction increased.