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http://hdl.handle.net/11422/13533| Type: | Dissertação |
| Title: | Chemical compatibility of nitrile, EPDM and fluor elastomers for oil and gas applications |
| Other Titles: | Compatibilidade química de elastômeros nitrílicos, EPDM e fluorados para aplicações em óleo e gás |
| Author(s)/Inventor(s): | Velloso, Caroline Slikta |
| Advisor: | Costa Neto, Celio Albano da |
| Abstract: | O presente estudo avaliou a compatibilidade química entre seis elastômeros usados em aplicações de óleo e gás e cinco fluidos. Os testes de imersão tiveram a duração de 8 semanas e a massa, volume e dureza dos elastômeros foram monitorados durante esse período. Xileno se mostrou o fluido mais agressivo de forma geral, levando a variações de massa de até 100% em um caso.O EPDM foi!o material mais afetado, as borrachas nitrílicas tiveram comportamento intermediário e!as fluoradas, a melhor performance. Ademais, o FFKM não sofreu ataque significativo de nenhum fluido. Para avaliar os efeitos do envelhecimento, testes de relaxação de tensão em compressão foram realizados em borrachas envelhecidas em xileno por 8 semanas. Não houve diferença no perfil das curvas dos elastômeros virgens e envelhecidos, mas o envelhecimento levou ao aumento de rigidez dos materiais. FTIR também foi realizado a fim de identificar as mudanças nas cadeias dos materiais imersos em xileno, porém apenas as borrachas fluoradas apresentaram alguma pequena diferença no espectro. |
| Abstract: | The present study evaluated the chemical compatibility between six elastomers used in Oi & Gas applications and five fluids. The immersion tests had a duration of 8 weeks and the mass, volume and hardness of the elastomers were monitored along this time. Xylene was the most aggressive fluid overall, leading to mass variation of 100% in one case. EPDM was the most affected material, while the nitrile rubbers presented intermediate behavior and the fluorinated rubbers, the best performance. Moreover, FFKM was not significantly affected by any fluid. For better evaluation of the effects of the ageing, Compression Stress Relaxation tests were performed using the elastomers immersed in Xylene for 8 weeks. No difference on the slope of the curves of the unaged and aged samples was observed, but the ageing lead to increase in stiffness of the materials. FTIR was also performed aiming at identifying the chain modification of the materials immersed in Xylene, and only the fluorinated rubbers presented some small variations on the spectra. |
| Keywords: | Compatibilidade química Compression stress relaxation FTIR |
| Subject CNPq: | CNPQ::ENGENHARIAS::ENGENHARIA DE MATERIAIS E METALURGICA |
| Program: | Programa de Pós-Graduação em Engenharia Metalúrgica e de Materiais |
| Production unit: | Instituto Alberto Luiz Coimbra de Pós-Graduação e Pesquisa de Engenharia |
| Publisher: | Universidade Federal do Rio de Janeiro |
| Issue Date: | May-2019 |
| Publisher country: | Brasil |
| Language: | eng |
| Right access: | Acesso Aberto |
| Appears in Collections: | Engenharia Metalúrgica e de Materiais |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CarolineSliktaVelloso-min.pdf | 1.93 MB | Adobe PDF | View/Open |
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