Polyurethane coatings in twentieth century outdoor painted sculptures. Part II: comparative study of four systems by means of Py-GC/MS

Defeyt, Catherine; Schilling, Michael; Langenbacher, Julia; Escarsega, John A.; Rivenc, Rachel

doi:10.1186/s40494-017-0129-2

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…As above https://doi.org/10.1007/s42452-021-04830-y with polyisocyanate [27]. In the case of crotonaldehyde, there is a case of detection in off-gases of polyurethane [28].…”

Section: Peggy 6 ⓡmentioning

confidence: 94%

“…Benzaldehyde is known to be used as an additive for polyurethane paints [25], and o-cresol are components used as blocking agents for polyurethane paints [26]. Phthalic acid and benzoic acid were also detected in the analysis of polyurethane paints [26,27], and bisphenol A is known to improve the durability of polyurethane coatings through cross-bonding ) and used. Soak in deionized water and rinse before using Gels were preloaded with a cleaning solution (ethyl alcohol 20% w/w in deionized water) by immersion for 24 h…”

Section: Analysis Of Organic Components Of Paintmentioning

confidence: 99%

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Paints analysis and conservation treatment of painted sculpture: Jean Dubuffet, Guard Dog II

Han¹,

Lee²,

Kim³

et al. 2021

SN Appl. Sci.

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Guard Dog II (1969–1970) by Jean Dubuffet is an artwork that shows the characteristics of the artist's l'hourloupe period (1962–1974). This study revealed the materials and manufacturing techniques used by the artist at the time through material analysis of Guard Dog II, and suggested an appropriate conservation treatment method for the work through a cleaning test. Dust, stains, discoloration, cracks, etc. were observed on the surface of the artwork and stains were particularly severe and discoloration required conservation treatment. Prior to treatment, multiple analytical approaches such as Fourier transform infrared spectroscopy, Raman spectroscopy and gas chromatography/mass spectrometer were applied to identify the materials of the paint layers and confirm the state of the conservation of the artworks. As a result, it was confirmed that polyurethane paint was used in the artwork, and the pigment used for each color was also identified. For the stable conservation treatment of the artwork, the chromaticity, glossiness and workability of the cleaning materials were evaluated, and it was found that isopropyl alcohol and nonionic surfactant were suitable for cleaning. The conservation treatment was performed based on results from the cleaning test, and the artwork was restored cleanly. Since most of the existing research on cleaning methods has been focused on painting, this study contributes to the conservation of sculptures by suggesting cleaning methods suitable for three-dimensional colored objects. Article highlights The materials and production techniques used in Jean Dubuffet, Guard Dog II were confirmed. As cleaning materials for deteriorated artworks, isopropyl alcohol and non-ionic surfactants are effective. Hydrogels are not suitable for this work due to the type and characteristics of the gels.

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“…As above https://doi.org/10.1007/s42452-021-04830-y with polyisocyanate [27]. In the case of crotonaldehyde, there is a case of detection in off-gases of polyurethane [28].…”

Section: Peggy 6 ⓡmentioning

confidence: 94%

Section: Analysis Of Organic Components Of Paintmentioning

confidence: 99%

Paints analysis and conservation treatment of painted sculpture: Jean Dubuffet, Guard Dog II

Han¹,

Lee²,

Kim³

et al. 2021

SN Appl. Sci.

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“…Py-GC/MS of polymeric materials is a very powerful technique as it allows the identification of polymer components from a complex pyrolyzate mixture using a library search approach [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Besides, there are commercial pyrolysis libraries that can be a really useful help.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis-GC/MS, A Powerful Analytical Tool for Additives and Polymers Characterization

Torre¹

2022

Recent Perspectives in Pyrolysis Research

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Analytical Pyrolysis technique hyphenated to GC/MS is used to obtain structural information of macromolecules. The composition and relative abundance of the pyrolysis products are characteristic for a given polymer and their determination allows the identification of materials that cannot be determined otherwise. In the present work different examples are presented in which different pyrolysis techniques are used, such as pulsed, fractional and sequential pyrolysis, working with polymer solutions, cold injection in split or narrow band mode or thermochemolysis. Specially useful is serial pyrolysis which is performed in two or more steps. Initially, volatile compounds are thermally extracted from the sample at a relatively low temperature (thermal desorption), and then the same sample is pyrolyzed at a higher temperature.

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“…At archaeological excavation sites, on-site consolidation is an important and widely applied conservation technique. Inorganic materials such as plaster [1][2][3][4][5] as well as organic synthetic polymers such as polyurethanes [6][7][8][9], polyacrylates [10,11] and epoxy resins [12,13] are all used to consolidate cultural relics on-site. However, application of these materials are subjected to an obvious drawback that they are very difficult, sometimes even impossible, to be removed afterwards.…”

Section: Introductionmentioning

confidence: 99%

Studies of internal stress induced by solidification of menthol melt as temporary consolidant in archaeological excavations using resistance strain gauge method

Chen

et al. 2020

Herit Sci

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Volatile organic solids, such as cyclododecane or menthol, have been employed as temporary reinforcement material during archaeological excavations. They are usually applied as melts and reinforcement is achieved once the melts solidify. Such solidification process can induce internal stress on the artifacts, which can be a big concern, especially to those very precious and fragile ones. However, information about such stress is still extremely limited at present. This paper proposes an experimental method based on resistance strain gauge technique to monitor the deformation induced by solidification of menthol melt. Bending tests are performed on very thin glass slides. The solidification process of menthol melt is well characterized by the development of mechanical strains. Then, menthol melts are applied to three kinds of simulated samples, i.e. glass, sandstone and rice paper, to investigate the mechanical response of preserved bodies upon solidification. It is found that menthol melt will generate certain amount expansion or contraction of the objects upon solidification. The stresses induced, evaluated according to obtained strains, are generally quite small, indicating that application of menthol as reinforcement material is safe in mechanics for cultural relics.

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Polyurethane coatings in twentieth century outdoor painted sculptures. Part II: comparative study of four systems by means of Py-GC/MS

Cited by 4 publications

References 13 publications

Paints analysis and conservation treatment of painted sculpture: Jean Dubuffet, Guard Dog II

Paints analysis and conservation treatment of painted sculpture: Jean Dubuffet, Guard Dog II

Pyrolysis-GC/MS, A Powerful Analytical Tool for Additives and Polymers Characterization

Studies of internal stress induced by solidification of menthol melt as temporary consolidant in archaeological excavations using resistance strain gauge method

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