Banca de QUALIFICAÇÃO: FERNANDO SERGIO DE MACEDO CALDAS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : FERNANDO SERGIO DE MACEDO CALDAS
DATA : 11/02/2018
HORA: 14:00
LOCAL: Laboratório de Materiais Cerâmicos e Metais Especiais
TÍTULO:

STUDY OF THE MECHANICAL RESISTANCE OF A POLYMERIC MATRIX COMPOSITE WITH ALUMINUM ADDITION

PALAVRAS-CHAVES:

Biomaterials, Bone Cements, PMMA, Alumina, Composite

PÁGINAS: 60
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
RESUMO:

There are several biomaterials being used in the area of medicine, especially orthopedic surgery, which are the bone cements, which are applied in the repair and restoration of bone failures resulting from fractures caused by high energy trauma,as a consequence of the increasing increase of accidents involving motor vehicles in large metropolises, as well as human aging, which in the face of osteoporosis, a disease that leads to a reduction of the mineral part of bones, causing pathological fractures. Bone cement based on polymethylmethacrylate (PMMA) is already widely applied in the field of orthopedic surgery. In this way, the work, on canvas, aims to improve the mechanical properties, mainly flexural strength, with the addition of alumina in minimum proportions in the polymer matrix (PMMA) in order to achieve this. In the belt a composite is born, that after successive experiments, could result in a material that will guard specific properties, and that could cause in the increase of the mechanical resistance. The composite formed by PMMA and Alumina, besides its effective applicability in the orthopedic area, will have a cost reduction, since the alumina is abundant in nature. For the experiment, we used the powders alone, pmma and alumina, and to obtain this composite, we used the mixture of polymer (powder) with addition of alumina, in proportions of 0.5%, 1% and 2% of the weight ratio in each sample, and the liquid reducer (monomer). The mixture was performed, and after the exothermic chemical reaction, at room temperature (37 ° C), lasting about 90 seconds, resulted in hardened samples in the form of bars. The microstructures of starting powders and post mixtures were observed and evaluated by scanning electron microscopy. The crystalline structure, composition and purity were studied by X-ray diffraction. The mechanical tests for the flexural strength test were results.

MEMBROS DA BANCA:
Externo à Instituição - ALESSANDRA AGNA ARAÚJO DOS SANTOS - UFRN
Externo à Instituição - ARIADNE DE SOUZA SILVA - UFRN
Presidente - 345842 - UILAME UMBELINO GOMES