Article (Scientific journals)
Polyurethane coatings in 20th century outdoor painted sculptures. Part I: Comparative study of various systems by means of ATR-FTIR spectroscopy
Defeyt, Catherine; Langenbacher, Julia; Rivenc, Rachel
2017In Heritage Science, 5
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Keywords :
outdoor sculpture; polyurethane; FTIR
Abstract :
[en] Like acrylics and alkyds, polyurethanes (PUs) represent an important class of industrial paints adopted by 20th and 21st artists; primarily by those creating outdoor painted sculptures (OPS). Because PU coatings offer a compromise between aesthetic and performance expectations, unachievable with other types of paints, they are commonly recognized as the most appropriate option for painted artworks intended for an outdoor setting. However, the PU class includes various systems and subgroups possessing very different properties. Through the FTIR-ATR study of 137 PU coating references from the Getty Conservation Institute (GCI) reference collection, this paper outlines the differences and the similarities existing, in terms of the composition, of two package solvent-borne, two package water-borne, one package water-borne and fluoropolymer polyurethanes. The comparison of the obtained FTIR-ATR results allowed determining markers helpful to discriminate specific PU subgroups by means of ATR-FTIR spectroscopy. The goals of this paper are to provide to the conservation professionals a better understanding of the versatility and diversity of PU coatings and to facilitate the identification of the various types initially used by the artists.
Research center :
CEA - Centre Européen en Archéométrie - ULiège
AAP - Art, Archéologie et Patrimoine - ULiège
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Arts & humanities: Multidisciplinary, general & others
Author, co-author :
Defeyt, Catherine ;  Université de Liège > Département de physique > Spectroscopie atomique et nucléaire, archéométrie
Langenbacher, Julia;  Getty Conservation Institute
Rivenc, Rachel;  Getty Conservation Institute
Language :
English
Title :
Polyurethane coatings in 20th century outdoor painted sculptures. Part I: Comparative study of various systems by means of ATR-FTIR spectroscopy
Publication date :
2017
Journal title :
Heritage Science
eISSN :
2050-7445
Publisher :
Springer, New York, United States - New York
Volume :
5
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 25 January 2017

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