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Previous issue date: 2012-08-24 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The study aimed at the treatment of attapulgite for the development and
characterization of composite recycled low density polyethylene - PEBD_rec
embedded with natural attapulgite - ATP_NAT, sifted - ATP_PN and attapulgite
treated with sulfuric acid - ATP_TR in different compositions (1, 3 and 5%) and
compared with the PEBD_rec. The atapulgitas, natural, screened and treated, were
characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), particle size
analysis, scanning electron microscopy (SEM), energy dispersive spectroscopy
(EDS) and determining the area specific surface (BET). The composites were
characterized by thermogravimetry (TG), differential scanning calorimetry (DSC), Xray
diffraction (XRD), torque rheometry, scanning electron microscopy (SEM) and
traction. The composite PEBD_rec / ATP (natural, sieved and treated) were
produced by mixing in the molten state in a single screw extruder matrix wire with
subsequent reprocessing matrix tape. It was found that the screening of attapulgite
not reduce the quantity of quartz and the acid treatment completely extracted
dolomite aggregate impurities of the channels attapulgite, and increase their surface
area. The addition of attapulgite in PEBD_rec acts as a catalyst, reducing the thermal
stability of the polymer. The increased concentration of attapulgite, increases
resistance and reduces the elongation at break and modulus of elasticity of the
composite PEBD_rec / attapulgite / O trabalho teve como objetivo o tratamento da atapulgita para o desenvolvimento e a
caracteriza??o de comp?sito de polietileno de baixa densidade reciclado
PEBD_rec incorporado com atapulgita natural ATP_NAT, peneirada ATP_PN e
com atapulgita tratada com ?cido sulf?rico ATP_TR, em diferentes composi??es
(1, 3 e 5%) e comparado com o PEBD_rec. As atapulgitas, natural, peneirada e
tratada, foram caracterizadas por difra??o de raios X (DRX), fluoresc?ncia de raios X
(FRX), an?lise granulom?trica, microscopia eletr?nica de varredura (MEV),
espectroscopia de energia dispersiva (EDS) e determina??o da ?rea superficial
espec?fica (BET). Os comp?sitos foram caracterizados por an?lise termogravim?trica
(TG), calorimetria diferencial explorat?ria (DSC), difra??o de raios X (DRX),
reometria de torque, microscopia eletr?nica de varredura (MEV) e tra??o. Os
comp?sitos de PEBD_rec /ATP (natural, peneirada e tratada) foram produzidos por
meio de mistura no estado fundido em uma extrusora monorosca com matriz de fio
com posterior reprocessamento com matriz de fita. Verificou-se que o peneiramento
da atapulgita n?o reduziu o teor de quartzo e que o tratamento ?cido extraiu
completamente a dolomita, impureza agregada nos canais da atapulgita, al?m de
aumentar sua ?rea superficial. A adi??o da atapulgita no PEBD_rec atua como
catalisador, reduzindo a estabilidade t?rmica do pol?mero. O aumento da
concentra??o de atapulgita aumenta a resist?ncia e reduz o alongamento na ruptura
e o m?dulo de elasticidade do comp?sito PEBD_rec / atapulgita
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12757 |
| Date | 24 August 2012 |
| Creators | Domingos, Luanda Gomes |
| Contributors | CPF:50580396720, http://lattes.cnpq.br/5460040602567184, Ito, Edson Noriyuki, CPF:40405036191, http://lattes.cnpq.br/7249500407405478, Santos, Am?lia Severino Ferreira e, CPF:59284064104, http://lattes.cnpq.br/5119417295487126, Rosa, Morsyleide de Freitas, CPF:82089205768, http://lattes.cnpq.br/7670383899259509, Acchar, Wilson |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia de Materiais, UFRN, BR, Processamento de Materiais a partir do P?; Pol?meros e Comp?sitos; Processamento de Materiais a part |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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