Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1021/acs.jced.0c01092 http://hdl.handle.net/11449/222019 |
Resumo: | Thermophysical properties and phase behavior of seven {polymer (1) + water (2)} systems were determined using PPG400, Ultraric PE62, Pluronic L64, Pluronic L35, PEG400, PEG600, and PEG1000. Density (ρ) and refractive index (n) were measured for the whole range of w1 at T = 293.2 K. Correlation with Redlich-Kister equation and prediction with Lorentz-Lorenz theoretical model were done. pH was measured for different mass fractions at ambient temperature (T ≈ 298.2 K). Cloud point temperature (Tcloud) was measured for different polymer mass fractions (w1) from 0.02 up to 0.30. The thermal expansion coefficient (αT) was calculated for w1 = 0.15 and temperature (T) from 278.2 up to 348.2 K. Experiments were conducted at atmospheric pressure (P ≈ 95 kPa). The obtained thermophysical properties indicate that PEGs + water have the highest ρ while PPG400 + water has the smallest ρ. Also, all ρ vs w1 curves present a maximum value. n profiles are similar for all systems, showing the same refractive index increment for w1 below 0.4. Density (Δρ) and refractive index (Δn) deviations are higher for the PPG400 + water system, mainly due to the highest propylene content and hydrophobic character of PPG units. Moreover, pH varies with polymer mass fraction reaching a minimum value, probably because polymers release H+ in solution. Phase transition results indicate that Tcloud and αT present related behaviors, i.e., when solution became turbid, αT shows an abrupt change in slope. |
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Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water SystemsThermophysical properties and phase behavior of seven {polymer (1) + water (2)} systems were determined using PPG400, Ultraric PE62, Pluronic L64, Pluronic L35, PEG400, PEG600, and PEG1000. Density (ρ) and refractive index (n) were measured for the whole range of w1 at T = 293.2 K. Correlation with Redlich-Kister equation and prediction with Lorentz-Lorenz theoretical model were done. pH was measured for different mass fractions at ambient temperature (T ≈ 298.2 K). Cloud point temperature (Tcloud) was measured for different polymer mass fractions (w1) from 0.02 up to 0.30. The thermal expansion coefficient (αT) was calculated for w1 = 0.15 and temperature (T) from 278.2 up to 348.2 K. Experiments were conducted at atmospheric pressure (P ≈ 95 kPa). The obtained thermophysical properties indicate that PEGs + water have the highest ρ while PPG400 + water has the smallest ρ. Also, all ρ vs w1 curves present a maximum value. n profiles are similar for all systems, showing the same refractive index increment for w1 below 0.4. Density (Δρ) and refractive index (Δn) deviations are higher for the PPG400 + water system, mainly due to the highest propylene content and hydrophobic character of PPG units. Moreover, pH varies with polymer mass fraction reaching a minimum value, probably because polymers release H+ in solution. Phase transition results indicate that Tcloud and αT present related behaviors, i.e., when solution became turbid, αT shows an abrupt change in slope.School of Chemical Engineering University of Campinas, Av. Albert Einstein 500, São PauloDepartment of Engineering Physics and Mathematics Institute of Chemistry of Araraquara São Paulo State University, Prof. Francisco Degni Street 55, São PauloDepartment of Engineering Physics and Mathematics Institute of Chemistry of Araraquara São Paulo State University, Prof. Francisco Degni Street 55, São PauloUniversidade Estadual de Campinas (UNICAMP)Universidade Estadual Paulista (UNESP)De Oliveira, Leonardo H.Pinto, Rafaela R.Monteiro Filho, Elias De S. [UNESP]Aznar, Martín2022-04-28T19:41:58Z2022-04-28T19:41:58Z2021-08-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2959-2975http://dx.doi.org/10.1021/acs.jced.0c01092Journal of Chemical and Engineering Data, v. 66, n. 8, p. 2959-2975, 2021.1520-51340021-9568http://hdl.handle.net/11449/22201910.1021/acs.jced.0c010922-s2.0-85110966992Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Chemical and Engineering Datainfo:eu-repo/semantics/openAccess2022-04-28T19:41:58Zoai:repositorio.unesp.br:11449/222019Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:06:41.131378Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
title |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
spellingShingle |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems De Oliveira, Leonardo H. |
title_short |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
title_full |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
title_fullStr |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
title_full_unstemmed |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
title_sort |
Density, Refractive Index, pH, and Cloud Point Temperature Measurements and Thermal Expansion Coefficient Calculation for PPG400, PE62, L64, L35, PEG400, PEG600, or PEG1000+ Water Systems |
author |
De Oliveira, Leonardo H. |
author_facet |
De Oliveira, Leonardo H. Pinto, Rafaela R. Monteiro Filho, Elias De S. [UNESP] Aznar, Martín |
author_role |
author |
author2 |
Pinto, Rafaela R. Monteiro Filho, Elias De S. [UNESP] Aznar, Martín |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Campinas (UNICAMP) Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
De Oliveira, Leonardo H. Pinto, Rafaela R. Monteiro Filho, Elias De S. [UNESP] Aznar, Martín |
description |
Thermophysical properties and phase behavior of seven {polymer (1) + water (2)} systems were determined using PPG400, Ultraric PE62, Pluronic L64, Pluronic L35, PEG400, PEG600, and PEG1000. Density (ρ) and refractive index (n) were measured for the whole range of w1 at T = 293.2 K. Correlation with Redlich-Kister equation and prediction with Lorentz-Lorenz theoretical model were done. pH was measured for different mass fractions at ambient temperature (T ≈ 298.2 K). Cloud point temperature (Tcloud) was measured for different polymer mass fractions (w1) from 0.02 up to 0.30. The thermal expansion coefficient (αT) was calculated for w1 = 0.15 and temperature (T) from 278.2 up to 348.2 K. Experiments were conducted at atmospheric pressure (P ≈ 95 kPa). The obtained thermophysical properties indicate that PEGs + water have the highest ρ while PPG400 + water has the smallest ρ. Also, all ρ vs w1 curves present a maximum value. n profiles are similar for all systems, showing the same refractive index increment for w1 below 0.4. Density (Δρ) and refractive index (Δn) deviations are higher for the PPG400 + water system, mainly due to the highest propylene content and hydrophobic character of PPG units. Moreover, pH varies with polymer mass fraction reaching a minimum value, probably because polymers release H+ in solution. Phase transition results indicate that Tcloud and αT present related behaviors, i.e., when solution became turbid, αT shows an abrupt change in slope. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-08-12 2022-04-28T19:41:58Z 2022-04-28T19:41:58Z |
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/10.1021/acs.jced.0c01092 Journal of Chemical and Engineering Data, v. 66, n. 8, p. 2959-2975, 2021. 1520-5134 0021-9568 http://hdl.handle.net/11449/222019 10.1021/acs.jced.0c01092 2-s2.0-85110966992 |
url |
http://dx.doi.org/10.1021/acs.jced.0c01092 http://hdl.handle.net/11449/222019 |
identifier_str_mv |
Journal of Chemical and Engineering Data, v. 66, n. 8, p. 2959-2975, 2021. 1520-5134 0021-9568 10.1021/acs.jced.0c01092 2-s2.0-85110966992 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Chemical and Engineering Data |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
2959-2975 |
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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1808129021666394112 |