Abstract

This research aims at bringing new contributions for lowering the polyether-based polyurethane (PUR) flexible foam high deterioration rate by studying selected storage conditions. With a life expectancy of 20–50 years, many PUR objects show severe deterioration signs that, so far, cannot be prevented. To establish a preservation strategy, a natural ageing experiment in the dark (12 months, 45–55% relative humidity) has been carried out for the study of four storage conditions: open air at room temperature (T) and sealed enclosures at room T (with/without oxygen) and low T (11–13 °C). For this research, unaged (model PUR) and naturally pre-aged (commercial PUR) references were included. The samples were analysed every 3 months by colourimetry, optical microscopy (visible and UV light), infrared and Raman microspectroscopies. Further statistical data treatment was carried out in order to identify significant spectral variations (ANOVA) and to uncover correlations between molecular spectral lines and physical aspects. Raman proved to be a powerful tool in the detection of early stage PUR molecular deterioration. For both model and commercial samples, open-air storage proved to be the most harmful condition, while anoxic storage showed the best results. In general, this experiment has enabled new contributions for lowering PUR high deterioration rate.

Original languageEnglish
Pages (from-to)1494-1504
Number of pages11
JournalJournal of Raman Spectroscopy
Volume47
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016

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Polyurethanes
Deterioration
Foams
Microscopic examination
Polyethers
Analysis of variance (ANOVA)
Enclosures
Ultraviolet radiation
Optical microscopy
polyurethane foam
Atmospheric humidity
Aging of materials
Experiments
Oxygen
Infrared radiation
Air

Keywords

  • conservation
  • long-term storage conditions
  • polyether-based polyurethane foam
  • Raman microscopy

Cite this

@article{1220df3a769c4adbb25ff6267d006b7d,
title = "A new insight into polyurethane foam deterioration: the use of Raman microscopy for the evaluation of long-term storage conditions",
abstract = "This research aims at bringing new contributions for lowering the polyether-based polyurethane (PUR) flexible foam high deterioration rate by studying selected storage conditions. With a life expectancy of 20–50 years, many PUR objects show severe deterioration signs that, so far, cannot be prevented. To establish a preservation strategy, a natural ageing experiment in the dark (12 months, 45–55{\%} relative humidity) has been carried out for the study of four storage conditions: open air at room temperature (T) and sealed enclosures at room T (with/without oxygen) and low T (11–13 °C). For this research, unaged (model PUR) and naturally pre-aged (commercial PUR) references were included. The samples were analysed every 3 months by colourimetry, optical microscopy (visible and UV light), infrared and Raman microspectroscopies. Further statistical data treatment was carried out in order to identify significant spectral variations (ANOVA) and to uncover correlations between molecular spectral lines and physical aspects. Raman proved to be a powerful tool in the detection of early stage PUR molecular deterioration. For both model and commercial samples, open-air storage proved to be the most harmful condition, while anoxic storage showed the best results. In general, this experiment has enabled new contributions for lowering PUR high deterioration rate.",
keywords = "conservation, long-term storage conditions, polyether-based polyurethane foam, Raman microscopy",
author = "{Fran{\cc}a de S{\'a}}, Susana and Ferreira, {Joana Lia} and Matos, {Ana Sofia} and Rita Macedo and Ramos, {Ana Maria}",
note = "Sem PDF conforme despacho. info:eu-repo/grantAgreement/FCT/5876/147218/PT# info:eu-repo/grantAgreement/FCT/SFRH/SFRH{\%}2FBD{\%}2F78862{\%}2F2011/PT# Funda{\cc}{\~a}o para a Ci{\^e}ncia e Tecnologia, Minist{\'e}rio da Educa{\cc}{\~a}o e da Ci{\^e}ncia, Portugal. Grant Numbers: UID/QUI/50006/2013, SFRH/BD/78862/2011",
year = "2016",
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T1 - A new insight into polyurethane foam deterioration

T2 - the use of Raman microscopy for the evaluation of long-term storage conditions

AU - França de Sá, Susana

AU - Ferreira, Joana Lia

AU - Matos, Ana Sofia

AU - Macedo, Rita

AU - Ramos, Ana Maria

N1 - Sem PDF conforme despacho. info:eu-repo/grantAgreement/FCT/5876/147218/PT# info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F78862%2F2011/PT# Fundação para a Ciência e Tecnologia, Ministério da Educação e da Ciência, Portugal. Grant Numbers: UID/QUI/50006/2013, SFRH/BD/78862/2011

PY - 2016/12/1

Y1 - 2016/12/1

N2 - This research aims at bringing new contributions for lowering the polyether-based polyurethane (PUR) flexible foam high deterioration rate by studying selected storage conditions. With a life expectancy of 20–50 years, many PUR objects show severe deterioration signs that, so far, cannot be prevented. To establish a preservation strategy, a natural ageing experiment in the dark (12 months, 45–55% relative humidity) has been carried out for the study of four storage conditions: open air at room temperature (T) and sealed enclosures at room T (with/without oxygen) and low T (11–13 °C). For this research, unaged (model PUR) and naturally pre-aged (commercial PUR) references were included. The samples were analysed every 3 months by colourimetry, optical microscopy (visible and UV light), infrared and Raman microspectroscopies. Further statistical data treatment was carried out in order to identify significant spectral variations (ANOVA) and to uncover correlations between molecular spectral lines and physical aspects. Raman proved to be a powerful tool in the detection of early stage PUR molecular deterioration. For both model and commercial samples, open-air storage proved to be the most harmful condition, while anoxic storage showed the best results. In general, this experiment has enabled new contributions for lowering PUR high deterioration rate.

AB - This research aims at bringing new contributions for lowering the polyether-based polyurethane (PUR) flexible foam high deterioration rate by studying selected storage conditions. With a life expectancy of 20–50 years, many PUR objects show severe deterioration signs that, so far, cannot be prevented. To establish a preservation strategy, a natural ageing experiment in the dark (12 months, 45–55% relative humidity) has been carried out for the study of four storage conditions: open air at room temperature (T) and sealed enclosures at room T (with/without oxygen) and low T (11–13 °C). For this research, unaged (model PUR) and naturally pre-aged (commercial PUR) references were included. The samples were analysed every 3 months by colourimetry, optical microscopy (visible and UV light), infrared and Raman microspectroscopies. Further statistical data treatment was carried out in order to identify significant spectral variations (ANOVA) and to uncover correlations between molecular spectral lines and physical aspects. Raman proved to be a powerful tool in the detection of early stage PUR molecular deterioration. For both model and commercial samples, open-air storage proved to be the most harmful condition, while anoxic storage showed the best results. In general, this experiment has enabled new contributions for lowering PUR high deterioration rate.

KW - conservation

KW - long-term storage conditions

KW - polyether-based polyurethane foam

KW - Raman microscopy

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U2 - 10.1002/jrs.4984

DO - 10.1002/jrs.4984

M3 - Article

VL - 47

SP - 1494

EP - 1504

JO - Journal of Raman Spectroscopy

JF - Journal of Raman Spectroscopy

SN - 0377-0486

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