Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-09T19:31:01Z
No. of bitstreams: 1
FernandaAlvesRibeiro_TESE.pdf: 4972549 bytes, checksum: 0745d78d97b0e53b086d596f53414354 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-10T23:32:57Z (GMT) No. of bitstreams: 1
FernandaAlvesRibeiro_TESE.pdf: 4972549 bytes, checksum: 0745d78d97b0e53b086d596f53414354 (MD5) / Made available in DSpace on 2017-03-10T23:32:57Z (GMT). No. of bitstreams: 1
FernandaAlvesRibeiro_TESE.pdf: 4972549 bytes, checksum: 0745d78d97b0e53b086d596f53414354 (MD5)
Previous issue date: 2016-10-11 / O consumo esmagador de Polietileno tereftalado (PET) grau garrafa constitui cap?tulo ? parte
entre as resinas produzidas no Brasil. Embora o pa?s consiga reciclar mais da metade da
produ??o de PET, ainda ? muito elevado o volume deste material em forma de garrafas.
Salienta-se que, apesar do benef?cio da resina PET poder ser utilizada em in?meras aplica??es
e sob diversos processos, ? necess?rio desenvolver alternativas de seu reuso na via de
reciclagem. Nesta vertente, o objetivo da pesquisa foi avaliar a aplica??o do tecido de pet,
oriundo do processo de reciclagem das garrafas, como refor?o de comp?sitos polim?ricos.
Para tanto, na metodologia utilizada, ap?s a preliminar caracteriza??o do tecido de pet via
ensaios t?xteis (Determina??o de gramatura; Resist?ncia ? propaga??o ao rasgo; Resist?ncia ?
tra??o e alongamento), confeccionou-se laminados comp?sitos polim?ricos com matriz ep?xi
e diferentes fra??es de tecido para a verifica??o e an?lise de suas principais propriedades
f?sico-qu?micas, mec?nicas e t?rmicas. Os seguintes ensaios foram realizados nos corpos de
prova de resina e laminado comp?sito: Densidade; Absor??o de ?gua; Teor de umidade;
Tra??o uniaxial; Flex?o em tr?s pontos; Compress?o; Dureza; TG; DMA e An?lise de fratura.
A an?lise dos resultados evidenciou que o incremento de camadas de tecido propicia ao
comp?sito o aumento nas resist?ncias ? tra??o e ? compress?o; al?m do que, eleva a rigidez
viscoel?stica do material, ao passo que diminui a resist?ncia ? flex?o. Observou-se tamb?m
que as camadas de tecido de PET diminuem o teor de umidade do comp?sito, bem como a sua
capacidade de absor??o de ?gua. Contudo, as propriedades Dureza e Densidade n?o
apresentaram varia??o significativa com a inclus?o do tecido de PET. A configura??o P90,
com o m?ximo teor de tecido de PET no laminado, exprimiu-se como a de melhor
desempenho frente aos ensaios realizados. Deste modo, a utiliza??o do tecido PET evidencia
aspectos atraentes para as iniciativas empresariais do setor. A composi??o P90, como refor?o
de comp?sito polim?rico, foi a que apresentou melhor resultado. Esse material tr?s reflexos
socio-econ?micos diretamente relacionados com a melhoria da qualidade de vida da
popula??o, gera??o de renda, economia de recursos naturais e atenua??o de problemas
ambientais. / There is no doubt whatsoever that the widest consumption of polyethylene terephthalate
(PET) bottle grade is a unique chapter among the resins produced in Brazil. Although the
country is able to recycle more than a half of all PET production, the number of such material
for bottle fabrication is still very high. It is important to remark that, though all benefits of
PET resin uses in uncountable applications and under many processes; alternatives to its reuse
throughout recycling dynamics must be developed. Thus, this work aims at evaluating the
application of PET fabric coming from the process of bottle recycling polymeric composite
reinforcements. In order to do so, after a preliminary characterization of the PET fabric by
textile tests (Grammage determination; Tear propagation resistance; Tensile strength and
elongation resistance), laminated polymeric composite with epoxy matrix as well as different
fractions of fabric for checking and analysis of their main physicochemical, mechanical and
thermal properties were engendered. The following tests were performed with the resin and
with laminated composite: Density, Water absorption; Moisture content; Uniaxial tensile;
Three point flexural test; Compression; Hardness; TG; DMA and Fracture analysis. By
analyzing the results, it was noticed that the increase of fabric layers provide a resistance and
compression gain to the composite, and it also increases the material viscoelastic stiffness, at
the same time as its flexural strength is diminish. It was also noticed that its water absorption
capacity was diminished. Nevertheless, its hardness and density properties did not present
meaningful variation with the PET addition. The P90 setting with the highest content of PET
fabric in the laminate presented itself as having the best results in the tests. Therefore the use
of PET fabric presents attracting aspects to entrepreneurship. P90 configuration used as
polymeric composite reinforcements were the one to present the best results. Such material
brings socio-economical reflexions directly linked to the improvement of livelihood, natural
resources economy and offset environment problems.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/22216 |
| Date | 11 October 2016 |
| Creators | Ribeiro, Fernanda Alves |
| Contributors | 12391085400, http://lattes.cnpq.br/7103009428184656, Souza, Luiz Guilherme Meira de, 25094955420, http://lattes.cnpq.br/0801747108308706, Melo, Mois?s Vieira de, 10774556404, http://lattes.cnpq.br/1337846419129004, Silva J?nior, Dorgival Albertino da, 05131125456, http://lattes.cnpq.br/5686657441961897, Santos, Natanaeyfle Randemberg Gomes dos, 03047568499, http://lattes.cnpq.br/0174046631340409, Mendes, Jos? Ubiragi de Lima |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0024 seconds