Banca de QUALIFICAÇÃO: CARLOS HENRIQUE ROMOALDO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : CARLOS HENRIQUE ROMOALDO
DATA : 19/06/2020
HORA: 13:30
LOCAL: meet.google.com/tgv-zidq-zon
TÍTULO:

Recycling Tetrafluoroethylene–Perfluoroalkyl Vinylether Copolymer (PFA) Using Extrusion Process

PALAVRAS-CHAVES:

tetrafluoroethylene–perfluoroalkyl vinylether copolymers, PFA, mechanical recycling, mechanical properties, chemical resistance

PÁGINAS: 18
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Orgânica
ESPECIALIDADE: Polímeros e Colóides
RESUMO:

Poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) is fluoropolymer that has an extensive application area, ranging from medical and aerospace industry, to household utensils. As a result, large volumes of waste (or residues) are generated during its processing, and its reincorporation is necessary not only because of the environmental appeal, but also because of its economic value. The objective of this study is to evaluate the viability of reincorporation of PFA’s residues, generated by the extrusion process, in to neat PFA (PFAv). The results showed that the reincorporation of up to 10% of reprocessed PFA (10PFAr) proved to be adequate to produce extruded tubes. In this sample, the thermal and chemical properties appeared to be stable, in addition it has not been found significant differences in the mechanical properties evaluated in comparison with the neat PFA sample. Besides that, higher concentration of PFAr (˃50%) promoted a reduction in tensile strength and elongation at break, in addition an increase in elastic modulus and hardness. The samples showed a yellowing effect, which was more evident with the increase of the PFAr content.

MEMBROS DA BANCA:
Presidente - 2386942 - EVELINE BISCHOFF
Interno - 1870324 - DOUGLAS ALEXANDRE SIMON
Interno - 056.367.377-00 - FERNANDA TRINDADE GONZALEZ DIAS - UFRGS