Differentiation between copal and amber by their structure and thermal behaviour

<p>The relationships between the polymerization related to structure and the composition of different types of natural resins were determined. Analyses were carried out by Fourier transform infrared spectroscopy (FTIR), differential thermal analysis–thermogravimetry (DTA-TG) and hot stage micr...

Descripción completa

Detalles Bibliográficos
Autores: Garcia Vallès, Maite, Di Mariano, A., Alfonso Abella, María Pura, Nogués, Joaquim M., Martínez Manent, Salvador
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2023
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/206381
Acceso en línea:https://hdl.handle.net/2445/206381
Access Level:acceso abierto
Palabra clave:Ambre
Microscòpia
Amber
Microscopy
id ES_a6bea486944bc05bdab0bf4fc7ac10b3
oai_identifier_str oai:diposit.ub.edu:2445/206381
network_acronym_str ES
network_name_str España
repository_id_str
spelling Differentiation between copal and amber by their structure and thermal behaviourGarcia Vallès, MaiteDi Mariano, A.Alfonso Abella, María PuraNogués, Joaquim M.Martínez Manent, SalvadorAmbreMicroscòpiaAmberMicroscopy<p>The relationships between the polymerization related to structure and the composition of different types of natural resins were determined. Analyses were carried out by Fourier transform infrared spectroscopy (FTIR), differential thermal analysis–thermogravimetry (DTA-TG) and hot stage microscopy (HSM). Copal specimens were collected from the Mai-Ndombe Lake, Democratic Republic of Congo, and amber pieces that came from Bitterfeld, Germany, and from Kaliningrad, Russia. FTIRspectra of copal show a vibrational band at 1643 cm−1 (C=O stretching) attributed to communic acids, while amber shows a band at 1735 cm−1 associated with ester-group vibrations and a shoulder at about 3340 cm−1, suggesting partial oxidization.DTA shows the main exothermic peak, related to the combustion, at 546–552 °C in amber and at 518 °C in copal. The derivative thermogravimetry (DTG) peaks vary in the different resin types; in amber, they occur at 333–335, 401–404 and 548–555 °C and are related to mass losses of 31, 26 and 39 mass%, respectively; copal peaks are at 394 and 507 °C, with mass losses of 71 and 27 mass%, respectively. In copal, hot stage microscopy (HSM) shows the start of sintering at 131 °C, followed by an expansion produced by the material decomposition and the generation of gases that cannot be released because of the material plastic behaviour. Finally, the increase in pressure produces an explosion that results in a lower viscosity of the liquid, which at this point can no longer support the internal pressure of gases. In amber samples, a smaller decrease in viscosity is observed and the start of sintering occurs at 150 °C with no significant change in their morphology.</p>Springer2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/206381Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1007/s10973-023-12333-8Journal of Thermal Analysis and Calorimetry, 2023, vol. 148, p. 13027-13037https://doi.org/10.1007/s10973-023-12333-8cc-by (c) The Authors, 2023http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2063812026-05-27T06:46:51Z
dc.title.none.fl_str_mv Differentiation between copal and amber by their structure and thermal behaviour
title Differentiation between copal and amber by their structure and thermal behaviour
spellingShingle Differentiation between copal and amber by their structure and thermal behaviour
Garcia Vallès, Maite
Ambre
Microscòpia
Amber
Microscopy
title_short Differentiation between copal and amber by their structure and thermal behaviour
title_full Differentiation between copal and amber by their structure and thermal behaviour
title_fullStr Differentiation between copal and amber by their structure and thermal behaviour
title_full_unstemmed Differentiation between copal and amber by their structure and thermal behaviour
title_sort Differentiation between copal and amber by their structure and thermal behaviour
dc.creator.none.fl_str_mv Garcia Vallès, Maite
Di Mariano, A.
Alfonso Abella, María Pura
Nogués, Joaquim M.
Martínez Manent, Salvador
author Garcia Vallès, Maite
author_facet Garcia Vallès, Maite
Di Mariano, A.
Alfonso Abella, María Pura
Nogués, Joaquim M.
Martínez Manent, Salvador
author_role author
author2 Di Mariano, A.
Alfonso Abella, María Pura
Nogués, Joaquim M.
Martínez Manent, Salvador
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ambre
Microscòpia
Amber
Microscopy
topic Ambre
Microscòpia
Amber
Microscopy
description <p>The relationships between the polymerization related to structure and the composition of different types of natural resins were determined. Analyses were carried out by Fourier transform infrared spectroscopy (FTIR), differential thermal analysis–thermogravimetry (DTA-TG) and hot stage microscopy (HSM). Copal specimens were collected from the Mai-Ndombe Lake, Democratic Republic of Congo, and amber pieces that came from Bitterfeld, Germany, and from Kaliningrad, Russia. FTIRspectra of copal show a vibrational band at 1643 cm−1 (C=O stretching) attributed to communic acids, while amber shows a band at 1735 cm−1 associated with ester-group vibrations and a shoulder at about 3340 cm−1, suggesting partial oxidization.DTA shows the main exothermic peak, related to the combustion, at 546–552 °C in amber and at 518 °C in copal. The derivative thermogravimetry (DTG) peaks vary in the different resin types; in amber, they occur at 333–335, 401–404 and 548–555 °C and are related to mass losses of 31, 26 and 39 mass%, respectively; copal peaks are at 394 and 507 °C, with mass losses of 71 and 27 mass%, respectively. In copal, hot stage microscopy (HSM) shows the start of sintering at 131 °C, followed by an expansion produced by the material decomposition and the generation of gases that cannot be released because of the material plastic behaviour. Finally, the increase in pressure produces an explosion that results in a lower viscosity of the liquid, which at this point can no longer support the internal pressure of gases. In amber samples, a smaller decrease in viscosity is observed and the start of sintering occurs at 150 °C with no significant change in their morphology.</p>
publishDate 2023
dc.date.none.fl_str_mv 2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/206381
url https://hdl.handle.net/2445/206381
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1007/s10973-023-12333-8
Journal of Thermal Analysis and Calorimetry, 2023, vol. 148, p. 13027-13037
https://doi.org/10.1007/s10973-023-12333-8
dc.rights.none.fl_str_mv cc-by (c) The Authors, 2023
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) The Authors, 2023
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869415722623434752
score 15,301603

Similares en LA Referencia