Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of Aerospace Technology and Management (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462019000100317 |
Resumo: | ABSTRACT When some materials need to be characterized, the hydroxyl number (IOH) determination is especially useful, mainly for those applied in the aerospace field. Usually, this characterization is performed by wet chemistry, using methodologies involving several steps, such as derivatization. This is a time-consuming and costly step. On the other hand, when the analysis is performed by Fourier transform infrared (FT-IR) spectroscopy, the most used region is the medium infrared (MIR) and transmission techniques are usually employed. However, FT-IR methodology developed error is usually not discussed. FT-IR methodology was developed in near infrared (NIR) and MIR regions, including non-conventional techniques, such as universal attenuated total reflection (UATR) and transflectance (near infrared reflection accessory [NIRA]), and transmission, to determine IOH in surfactants, used in aerospace catalysts/cosmetic products, and polyesters, applied in paints. According to the samples’ characteristics, surfactants were analyzed by transmission/solution and, as received, by NIRA. Polyesters were analyzed by UATR and NIRA, as received. The IOH values for all samples were also measured by wet chemistry and/or potentiometry (supplier’s data) and used as reference. Good linear correlations were observed between 0.939 and 0.976, being considered with good precision, and between 88% (NIRA) and 98% (MIR) of the results were explained by developed methodologies. |
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Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial ApplicationsFT-IRHydroxyl numberPolyestersSurfactantsUATRABSTRACT When some materials need to be characterized, the hydroxyl number (IOH) determination is especially useful, mainly for those applied in the aerospace field. Usually, this characterization is performed by wet chemistry, using methodologies involving several steps, such as derivatization. This is a time-consuming and costly step. On the other hand, when the analysis is performed by Fourier transform infrared (FT-IR) spectroscopy, the most used region is the medium infrared (MIR) and transmission techniques are usually employed. However, FT-IR methodology developed error is usually not discussed. FT-IR methodology was developed in near infrared (NIR) and MIR regions, including non-conventional techniques, such as universal attenuated total reflection (UATR) and transflectance (near infrared reflection accessory [NIRA]), and transmission, to determine IOH in surfactants, used in aerospace catalysts/cosmetic products, and polyesters, applied in paints. According to the samples’ characteristics, surfactants were analyzed by transmission/solution and, as received, by NIRA. Polyesters were analyzed by UATR and NIRA, as received. The IOH values for all samples were also measured by wet chemistry and/or potentiometry (supplier’s data) and used as reference. Good linear correlations were observed between 0.939 and 0.976, being considered with good precision, and between 88% (NIRA) and 98% (MIR) of the results were explained by developed methodologies.Departamento de Ciência e Tecnologia Aeroespacial2019-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462019000100317Journal of Aerospace Technology and Management v.11 2019reponame:Journal of Aerospace Technology and Management (Online)instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA)instacron:DCTA10.5028/jatm.v11.1027info:eu-repo/semantics/openAccessJesus,Laís LopesMurakami,Lídia Mattos SilvaMello,Talita de Souza DiasDiniz,Milton FariaSilva,Leandro MattosMattos,Elizabeth da CostaDutra,Rita de Cássia Lazzarinieng2019-04-01T00:00:00Zoai:scielo:S2175-91462019000100317Revistahttp://www.jatm.com.br/ONGhttps://old.scielo.br/oai/scielo-oai.php||secretary@jatm.com.br2175-91461984-9648opendoar:2019-04-01T00:00Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA)false |
dc.title.none.fl_str_mv |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
title |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
spellingShingle |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications Jesus,Laís Lopes FT-IR Hydroxyl number Polyesters Surfactants UATR |
title_short |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
title_full |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
title_fullStr |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
title_full_unstemmed |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
title_sort |
Evaluation of Techniques for Determination of Hydroxyl Value in Materials for Different Industrial Applications |
author |
Jesus,Laís Lopes |
author_facet |
Jesus,Laís Lopes Murakami,Lídia Mattos Silva Mello,Talita de Souza Dias Diniz,Milton Faria Silva,Leandro Mattos Mattos,Elizabeth da Costa Dutra,Rita de Cássia Lazzarini |
author_role |
author |
author2 |
Murakami,Lídia Mattos Silva Mello,Talita de Souza Dias Diniz,Milton Faria Silva,Leandro Mattos Mattos,Elizabeth da Costa Dutra,Rita de Cássia Lazzarini |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Jesus,Laís Lopes Murakami,Lídia Mattos Silva Mello,Talita de Souza Dias Diniz,Milton Faria Silva,Leandro Mattos Mattos,Elizabeth da Costa Dutra,Rita de Cássia Lazzarini |
dc.subject.por.fl_str_mv |
FT-IR Hydroxyl number Polyesters Surfactants UATR |
topic |
FT-IR Hydroxyl number Polyesters Surfactants UATR |
description |
ABSTRACT When some materials need to be characterized, the hydroxyl number (IOH) determination is especially useful, mainly for those applied in the aerospace field. Usually, this characterization is performed by wet chemistry, using methodologies involving several steps, such as derivatization. This is a time-consuming and costly step. On the other hand, when the analysis is performed by Fourier transform infrared (FT-IR) spectroscopy, the most used region is the medium infrared (MIR) and transmission techniques are usually employed. However, FT-IR methodology developed error is usually not discussed. FT-IR methodology was developed in near infrared (NIR) and MIR regions, including non-conventional techniques, such as universal attenuated total reflection (UATR) and transflectance (near infrared reflection accessory [NIRA]), and transmission, to determine IOH in surfactants, used in aerospace catalysts/cosmetic products, and polyesters, applied in paints. According to the samples’ characteristics, surfactants were analyzed by transmission/solution and, as received, by NIRA. Polyesters were analyzed by UATR and NIRA, as received. The IOH values for all samples were also measured by wet chemistry and/or potentiometry (supplier’s data) and used as reference. Good linear correlations were observed between 0.939 and 0.976, being considered with good precision, and between 88% (NIRA) and 98% (MIR) of the results were explained by developed methodologies. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462019000100317 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2175-91462019000100317 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5028/jatm.v11.1027 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Departamento de Ciência e Tecnologia Aeroespacial |
publisher.none.fl_str_mv |
Departamento de Ciência e Tecnologia Aeroespacial |
dc.source.none.fl_str_mv |
Journal of Aerospace Technology and Management v.11 2019 reponame:Journal of Aerospace Technology and Management (Online) instname:Departamento de Ciência e Tecnologia Aeroespacial (DCTA) instacron:DCTA |
instname_str |
Departamento de Ciência e Tecnologia Aeroespacial (DCTA) |
instacron_str |
DCTA |
institution |
DCTA |
reponame_str |
Journal of Aerospace Technology and Management (Online) |
collection |
Journal of Aerospace Technology and Management (Online) |
repository.name.fl_str_mv |
Journal of Aerospace Technology and Management (Online) - Departamento de Ciência e Tecnologia Aeroespacial (DCTA) |
repository.mail.fl_str_mv |
||secretary@jatm.com.br |
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1754732532032602112 |