Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.matchemphys.2019.122467 http://hdl.handle.net/11449/201352 |
Resumo: | Thermoplastic elastomers (TPE) have been used instead of traditional elastomers, since they combine the low cost of raw material with easy processing and recyclability. When used in sealing components, the polyester-based TPE, or COPEs, are most common. Although COPEs have mechanical properties similar to those of elastomers, they have limited resistance to corrosion in chlorinated water. Argon Plasma Immersion Ion Implantation (IIIP) treatments were applied to alter the morphology and chemical composition of the COPE surface, with the goal of increasing its chemical inertia in chlorinated water while preserving the desired bulk properties. The effect of ion bombardment energy on the elemental composition, chemical structure, morphology, topography and mechanical properties of COPEs was evaluated, along with whether changes in such properties affected the degradation resistance of the material in chlorinated water. Treatments were performed for 60 min in radiofrequency argon plasmas (13.56 MHz, 5.0 Pa), with the power of the excitation signal varying from 10 to 150 W. Since variations in signal power changed the self-bias potential of the driven electrode, and samples were positioned at this electrode, the ion bombardment intensity was varied in the different treatments. Immediately after treatments, surfaces became more hydrophilic than the as-received ones, but after being aged in air, some samples became hydrophobic. Dehydrogenation was the main alteration attained in chemical composition, inducing changes in the overall chemical structure. Species removal from less resistant regions promoted creation of nanometric structures randomly distributed on the surface but without promoting changes in the volumetric mechanical properties of COPE. The most pronounced surface changes were observed for the sample treated in plasmas at 150 W, which also presented the highest resistance to chlorinated solution. This improvement suggests an increase in COPE performance in practice. |
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Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardmentChlorine degradationCOPEPlasma immersion ion implantationThermoplastic elastomerWettabilityThermoplastic elastomers (TPE) have been used instead of traditional elastomers, since they combine the low cost of raw material with easy processing and recyclability. When used in sealing components, the polyester-based TPE, or COPEs, are most common. Although COPEs have mechanical properties similar to those of elastomers, they have limited resistance to corrosion in chlorinated water. Argon Plasma Immersion Ion Implantation (IIIP) treatments were applied to alter the morphology and chemical composition of the COPE surface, with the goal of increasing its chemical inertia in chlorinated water while preserving the desired bulk properties. The effect of ion bombardment energy on the elemental composition, chemical structure, morphology, topography and mechanical properties of COPEs was evaluated, along with whether changes in such properties affected the degradation resistance of the material in chlorinated water. Treatments were performed for 60 min in radiofrequency argon plasmas (13.56 MHz, 5.0 Pa), with the power of the excitation signal varying from 10 to 150 W. Since variations in signal power changed the self-bias potential of the driven electrode, and samples were positioned at this electrode, the ion bombardment intensity was varied in the different treatments. Immediately after treatments, surfaces became more hydrophilic than the as-received ones, but after being aged in air, some samples became hydrophobic. Dehydrogenation was the main alteration attained in chemical composition, inducing changes in the overall chemical structure. Species removal from less resistant regions promoted creation of nanometric structures randomly distributed on the surface but without promoting changes in the volumetric mechanical properties of COPE. The most pronounced surface changes were observed for the sample treated in plasmas at 150 W, which also presented the highest resistance to chlorinated solution. This improvement suggests an increase in COPE performance in practice.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Technological Plasmas Laboratory Paulista State University UNESP Science and Technology Institute of Sorocaba, Av. Três de Março, 511Federal University of São Carlos Sorocaba Campus UFSCAR, Sorocaba, SP, Brazil Rod. João Leme Dos Santos, Km 110Materials Sciences Division Lawrence Berkeley National Laboratory, 1 Cyclotron RoadMaterials Metrology Division National Institute of Metrology Quality and Technology, Duque de CaxiasTechnological Plasmas Laboratory Paulista State University UNESP Science and Technology Institute of Sorocaba, Av. Três de Março, 511FAPESP: 2012/14708-2Universidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Lawrence Berkeley National LaboratoryQuality and TechnologyResende, R. C. [UNESP]Ribeiro, R. P. [UNESP]Waldman, W. R.Cruz, N. C. [UNESP]Araujo, J. R.Rangel, E. C. [UNESP]2020-12-12T02:30:20Z2020-12-12T02:30:20Z2020-02-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.matchemphys.2019.122467Materials Chemistry and Physics, v. 242.0254-0584http://hdl.handle.net/11449/20135210.1016/j.matchemphys.2019.1224672-s2.0-85075533031Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Chemistry and Physicsinfo:eu-repo/semantics/openAccess2021-10-22T17:27:30Zoai:repositorio.unesp.br:11449/201352Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T23:41:22.116143Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
title |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
spellingShingle |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment Resende, R. C. [UNESP] Chlorine degradation COPE Plasma immersion ion implantation Thermoplastic elastomer Wettability |
title_short |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
title_full |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
title_fullStr |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
title_full_unstemmed |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
title_sort |
Improvement of thermoplastic elastomer degradation resistance by low-energy plasma immersion ion bombardment |
author |
Resende, R. C. [UNESP] |
author_facet |
Resende, R. C. [UNESP] Ribeiro, R. P. [UNESP] Waldman, W. R. Cruz, N. C. [UNESP] Araujo, J. R. Rangel, E. C. [UNESP] |
author_role |
author |
author2 |
Ribeiro, R. P. [UNESP] Waldman, W. R. Cruz, N. C. [UNESP] Araujo, J. R. Rangel, E. C. [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) Lawrence Berkeley National Laboratory Quality and Technology |
dc.contributor.author.fl_str_mv |
Resende, R. C. [UNESP] Ribeiro, R. P. [UNESP] Waldman, W. R. Cruz, N. C. [UNESP] Araujo, J. R. Rangel, E. C. [UNESP] |
dc.subject.por.fl_str_mv |
Chlorine degradation COPE Plasma immersion ion implantation Thermoplastic elastomer Wettability |
topic |
Chlorine degradation COPE Plasma immersion ion implantation Thermoplastic elastomer Wettability |
description |
Thermoplastic elastomers (TPE) have been used instead of traditional elastomers, since they combine the low cost of raw material with easy processing and recyclability. When used in sealing components, the polyester-based TPE, or COPEs, are most common. Although COPEs have mechanical properties similar to those of elastomers, they have limited resistance to corrosion in chlorinated water. Argon Plasma Immersion Ion Implantation (IIIP) treatments were applied to alter the morphology and chemical composition of the COPE surface, with the goal of increasing its chemical inertia in chlorinated water while preserving the desired bulk properties. The effect of ion bombardment energy on the elemental composition, chemical structure, morphology, topography and mechanical properties of COPEs was evaluated, along with whether changes in such properties affected the degradation resistance of the material in chlorinated water. Treatments were performed for 60 min in radiofrequency argon plasmas (13.56 MHz, 5.0 Pa), with the power of the excitation signal varying from 10 to 150 W. Since variations in signal power changed the self-bias potential of the driven electrode, and samples were positioned at this electrode, the ion bombardment intensity was varied in the different treatments. Immediately after treatments, surfaces became more hydrophilic than the as-received ones, but after being aged in air, some samples became hydrophobic. Dehydrogenation was the main alteration attained in chemical composition, inducing changes in the overall chemical structure. Species removal from less resistant regions promoted creation of nanometric structures randomly distributed on the surface but without promoting changes in the volumetric mechanical properties of COPE. The most pronounced surface changes were observed for the sample treated in plasmas at 150 W, which also presented the highest resistance to chlorinated solution. This improvement suggests an increase in COPE performance in practice. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T02:30:20Z 2020-12-12T02:30:20Z 2020-02-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.matchemphys.2019.122467 Materials Chemistry and Physics, v. 242. 0254-0584 http://hdl.handle.net/11449/201352 10.1016/j.matchemphys.2019.122467 2-s2.0-85075533031 |
url |
http://dx.doi.org/10.1016/j.matchemphys.2019.122467 http://hdl.handle.net/11449/201352 |
identifier_str_mv |
Materials Chemistry and Physics, v. 242. 0254-0584 10.1016/j.matchemphys.2019.122467 2-s2.0-85075533031 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Chemistry and Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129543815299072 |