Banca de DEFESA: ADEILSON DE OLIVEIRA SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : ADEILSON DE OLIVEIRA SOUZA
DATA : 16/07/2019
HORA: 14:00
LOCAL: Sala 8 da Escola de Ciências e Tecnologia - ECT/UFRN
TÍTULO:

Evaluation of mechanical and barrier properties of films based on eva / clay

PALAVRAS-CHAVES:

EVA, clay, mechanical properties, barrier properties

PÁGINAS: 98
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Mecânica
RESUMO:

Polymer films based on ethylene vinyl acetate (EVA) were produced in this

work, as well as nanocomposites of EVA and Cloisite 20A clay. These films and

nanocomposites were produced with two different solvent types, chloroform and

tetrahydrofuran by the solvent evaporation technique. Compositions 3% and 5%

clay by weight with respect to the polymer weight were used for the production of

nanocomposites, both using chloroform as solvent, such as tetrahydrofuran. To

evaluate the influence of the type of solvent and the addition of clay in the polymer

matrix on the properties of the films the techniques of diffraction of x - ray, Fourier

transform infrared, contact angle and water vapor transmission rate were used.

The x-ray diffraction showed a dispersion of the clay in the films. The Fourier

transform infrared showed that the addition of clay as well as the use of the

different solvents did not modify the characteristic bands of the film. From the

results obtained by the water vapor transmission test an increase of the barrier

properties of the films with the addition of clay and a greater homogeneity in the

results obtained using tetrahydrofuran as solvent can be verified. The contact angle

characterization showed that the addition of clay in the polymer matrix caused a

change in the hydrophobicity of the films.

MEMBROS DA BANCA:
Presidente - 2254759 - AMANDA MELISSA DAMIAO LEITE
Externa ao Programa - 1718775 - KALINE MELO DE SOUTO VIANA
Externo à Instituição - RENE ANISIO DA PAZ - UFCG