Modification of LDPE molecular structure by gamma irradiation for bioapplications

Detalhes bibliográficos
Autor(a) principal: Ferreira, L. M.
Data de Publicação: 2005
Outros Autores: Falcão, A. N., Gil, M. H.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/3802
https://doi.org/10.1016/j.nimb.2005.04.030
Resumo: The surface properties of low-density polyethylene (LDPE) can be modified by the grafting of 2-hydroxyethyl methacrylate (HEMA). This was done aiming at the production of new materials suitable for bioapplications. Samples with different monomer concentrations were prepared from LDPE particles by gamma irradiation, following different irradiation protocols, including irradiation in presence and absence of air. The samples were characterized by thermal analysis techniques (DSC and TGA) and by Fourier transform infrared spectroscopy (FTIR). The results obtained show a decrease in the crystallinity of the supporting matrix for copolymers with high yields of grafting. However, the new materials prepared maintain good structural order resulting from the protective effect of polyHEMA grafted onto LDPE backbone. These effects can improve the diffusion of other species deeper inside the matrix and increase the material hydrophilicity. The studies performed made possible the selection of experimental protocols adequate for the production of new copolymeric materials with high grafting yield. These were used in the production of new LDPE films with enhanced hydrophilic properties.
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spelling Modification of LDPE molecular structure by gamma irradiation for bioapplicationsGraft copolymersGamma radiationPolymer characterizationPolymers for bioapplicationsThe surface properties of low-density polyethylene (LDPE) can be modified by the grafting of 2-hydroxyethyl methacrylate (HEMA). This was done aiming at the production of new materials suitable for bioapplications. Samples with different monomer concentrations were prepared from LDPE particles by gamma irradiation, following different irradiation protocols, including irradiation in presence and absence of air. The samples were characterized by thermal analysis techniques (DSC and TGA) and by Fourier transform infrared spectroscopy (FTIR). The results obtained show a decrease in the crystallinity of the supporting matrix for copolymers with high yields of grafting. However, the new materials prepared maintain good structural order resulting from the protective effect of polyHEMA grafted onto LDPE backbone. These effects can improve the diffusion of other species deeper inside the matrix and increase the material hydrophilicity. The studies performed made possible the selection of experimental protocols adequate for the production of new copolymeric materials with high grafting yield. These were used in the production of new LDPE films with enhanced hydrophilic properties.http://www.sciencedirect.com/science/article/B6TJN-4G7DXV4-Y/1/f2a840cb28d43357b8175d66f67073212005info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleaplication/PDFhttp://hdl.handle.net/10316/3802http://hdl.handle.net/10316/3802https://doi.org/10.1016/j.nimb.2005.04.030engNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 236:1-4 (2005) 513-520Ferreira, L. M.Falcão, A. N.Gil, M. H.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2020-11-06T16:49:22Zoai:estudogeral.uc.pt:10316/3802Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:59:15.014364Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Modification of LDPE molecular structure by gamma irradiation for bioapplications
title Modification of LDPE molecular structure by gamma irradiation for bioapplications
spellingShingle Modification of LDPE molecular structure by gamma irradiation for bioapplications
Ferreira, L. M.
Graft copolymers
Gamma radiation
Polymer characterization
Polymers for bioapplications
title_short Modification of LDPE molecular structure by gamma irradiation for bioapplications
title_full Modification of LDPE molecular structure by gamma irradiation for bioapplications
title_fullStr Modification of LDPE molecular structure by gamma irradiation for bioapplications
title_full_unstemmed Modification of LDPE molecular structure by gamma irradiation for bioapplications
title_sort Modification of LDPE molecular structure by gamma irradiation for bioapplications
author Ferreira, L. M.
author_facet Ferreira, L. M.
Falcão, A. N.
Gil, M. H.
author_role author
author2 Falcão, A. N.
Gil, M. H.
author2_role author
author
dc.contributor.author.fl_str_mv Ferreira, L. M.
Falcão, A. N.
Gil, M. H.
dc.subject.por.fl_str_mv Graft copolymers
Gamma radiation
Polymer characterization
Polymers for bioapplications
topic Graft copolymers
Gamma radiation
Polymer characterization
Polymers for bioapplications
description The surface properties of low-density polyethylene (LDPE) can be modified by the grafting of 2-hydroxyethyl methacrylate (HEMA). This was done aiming at the production of new materials suitable for bioapplications. Samples with different monomer concentrations were prepared from LDPE particles by gamma irradiation, following different irradiation protocols, including irradiation in presence and absence of air. The samples were characterized by thermal analysis techniques (DSC and TGA) and by Fourier transform infrared spectroscopy (FTIR). The results obtained show a decrease in the crystallinity of the supporting matrix for copolymers with high yields of grafting. However, the new materials prepared maintain good structural order resulting from the protective effect of polyHEMA grafted onto LDPE backbone. These effects can improve the diffusion of other species deeper inside the matrix and increase the material hydrophilicity. The studies performed made possible the selection of experimental protocols adequate for the production of new copolymeric materials with high grafting yield. These were used in the production of new LDPE films with enhanced hydrophilic properties.
publishDate 2005
dc.date.none.fl_str_mv 2005
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dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/3802
http://hdl.handle.net/10316/3802
https://doi.org/10.1016/j.nimb.2005.04.030
url http://hdl.handle.net/10316/3802
https://doi.org/10.1016/j.nimb.2005.04.030
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 236:1-4 (2005) 513-520
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dc.format.none.fl_str_mv aplication/PDF
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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