Banca de DEFESA: SIMONE ELZA DOS SANTOS TEODORO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : SIMONE ELZA DOS SANTOS TEODORO
DATE: 21/05/2021
TIME: 09:00
LOCAL: Plataforma Virtual
TITLE:

EVALUATION OF THE ADDITION OF TYPE I COLLAGEN IN THERMOFIXED ADHESIVE BASED ON POLYURETHANE

KEY WORDS:

Polyurethane; collagen; adhesive

PAGES: 65
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Físico-Química
SUMMARY:

In this work was synthezed an adhesive based on polyurethane from the prepolymer 2,4-toluene diisocyanate (TDI) and  2,4-dimethyl-thio-toluenediamine (DMTDA) as chain extender. The partial replacement of the extensor by collagen I was performed. Samples were produced and their physical, mechanical, morphological and thermalproperties  were evaluated. The results of the mechanical tests have showed that there are an increase in the percentage of the rigid phase leading to an increase in tensile strength and resistance to organic solvents. The morphological analyzes indicated that the collagen increased the percentage of the rigid phase and promoted the formation of smaller microcells, more evenly distributed in the adhesive. Thermogravimetry analyzes indicated the presence of two stages of degradation, referring to the rigid and flexible phases, respectively. Differential exploratory calorimetry tests indicated that the collagen formulation showed a degree of christality confirmed by the DRX.

BANKING MEMBERS:
Presidente - PATRICIA SANTIAGO DE OLIVEIRA PATRICIO
Interno - EMERSON FERNANDES PEDROSO
Interno - PAULO FERNANDO RIBEIRO ORTEGA