Study of ageing of ketone resins used as picture varnishes by pyrolysis–silylation–gas chromatography–mass spectrometry

Doménech‐Carbó, María Teresa; Bitossi, Giovanna; Osete-Cortina, Laura; Marco, Dolores Julia Yusá

doi:10.1016/j.jaap.2008.11.013

Cited by 12 publications

(8 citation statements)

References 17 publications

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“…The self-condensate Keton N seems more stable during pyrolysis (590 and 650 °C vs 764 °C), whereas a pyrolysis temperatures of 590 °C already leads to a good fragmentation of the AW2 mixed condensate. However, a higher pyrolysis temperature provokes an excessive fragmentation so that other authors propose less temperature …”

Section: Resultsmentioning

confidence: 99%

“…The most important fragments in each polymeric resin group are described as follows. Traces of the polymers have not been detected, because the pyrolysis reached high yielding, and due to the low volatility of the remaining polymer, the amount of polymeric trace introduced into the chromatographic system would be under the limit of detection …”

Section: Resultsmentioning

confidence: 99%

“…The characterization of the polymers is then made by means of the identified fragments, relating them to the structure of the polymer. Good results with Py-GC/MS were achieved for most of the high molecular weight polymers (e.g., polyacrylates and poly(vinyl acetate)s 10,13,14 ) and also some low molecular weight synthetic resins (e.g., phenol resins, 18 ketone resins, 19 hydrocarbon resins). The polymer fragments with polar groups can show resolution problems on a nonpolar column; thus, many authors propose a simultaneous derivatization reaction.…”

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confidence: 99%

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Characterization of Commercial Synthetic Resins by Pyrolysis-Gas Chromatography/Mass Spectrometry: Application to Modern Art and Conservation

et al. 2009

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To characterize a set of synthetic resins, a methodology by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) has been developed. The studied reference materials were commercial versions of a wide range of synthetic resins. For each polymer, the pyrolytic and chromatographic conditions were optimized to adequately resolve the fragment mixture in a short time. The proposed analytical method does not require previous treatment of the sample, and due to its high sensitivity, only a small sample quantity in the microgram range can be used. The pyrolysis temperature was found to have little effect on the obtained pyrograms. The summarized data set for the individual polymer materials, especially the characteristic fragments with a structure close to the monomeric unit, was useful to identify commercial synthetic resins. These materials were used in the art and conservation field, as binding media, paint additives, painting varnishes, coatings, or consolidants. Two case studies are introduced where direct Py-GC/MS and thermally assisted hydrolysis and methylation GC/MS were applied on art objects: first, a modern gluing material of a medieval reverse glass painting, and the second example, the binding medium of a painting by Georg Baselitz ("Senta", 1992/1993) from the Sammlung Moderne Kunst at the Pinakothek der Moderne, Munich.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Characterization of Commercial Synthetic Resins by Pyrolysis-Gas Chromatography/Mass Spectrometry: Application to Modern Art and Conservation

et al. 2009

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“…[7] these destructive factors should be clarified. In this frame, the impact of ultraviolet irradiation, humidity, and temperature on the painting's chromatic structure have been found to be of primary importance [8,9]. Given the increasing and varied application of paints, it is necessary to evaluate their stability against destructive factors such as sun light [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effects of UV on Ageing Properties of some Nail Polishes, Acrylic Emulsions and Gloss Paints

Oyedeji¹,

Busayo²

2017

ijSciences

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Photo-degradation stability of most commonly used nail polishes, acrylic paint emulsions and gloss paints have been investigated. The paints investigated in this study were nail polishes red (17), wine (23, 36 and 92), pink (26, 39 and 80). Lilaic (52), purple (16), golden (43) made by Yimei Commodities co; Ltd and acrylic emulsions 7084 (Pacific Blue), 3040 (Cream) and 9999 (Brilliant White) and gloss paints 7084, 3040 and 9102G (Brilliant White) made by Fine Coat. The Dry to Touch time, weight loss of the paint film, discolouration and structural changes of the paints subjected to UV irradiation in an accelerated ageing chamber were determined at 0, 100, 150, 200 and 300 hours of UV irradiation making use of gravimetry, colorimetry and FT-IR Spectroscopy. Results show Dry to touch time for nail polishes to be less than 2 minutes, 30 minutes for acrylic emulsions and about 60 minutes for gloss paints. Weight loss observed was in the order Pacific blues > Brilliant white > Cream. There was no significant weight loss for the Nail polishes. Colorimetric measurements indicated the reduction in the absorption of visible light and discolouration and loss of gloss was evident in the blue paint more than others. Increase in absorbance was observed for all nail polishes with the exception of Red (17) and the application of Varnish (V 45 ) to the nail polishes inhibited discolouration. FT-IR spectroscopy showed that Pacific Blue 7084, followed by Brilliant White 9999 and Cream 3040 showed most structural changes. There was the reduction of transmission peak at 2900 cm -1 , (symmetric stretching of C-H bond), 1823 cm -1, 1731 cm -1 (C=O,) and disappearance of 1625 cm -1 (C=C) and 2925 cm -1 (C-H stretching) which was noteworthy. Similar results were obtained for the nail polish. In conclusion, the samples of the paints analyzed were not stable to UV radiation. Weight loss occurred to samples which were treated to accelerated ageing procedures hence, paints aged faster on exposure to UV radiation. Application of varnish onto the surface of nail polish inhibited discolouration and slowed down ageing. Pacific blue paints aged faster than other colours.

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“…Py-GC/MS is particularly suitable for the analysis of synthetic polymers [12][13][14][15] or polymeric fractions of natural resins [16][17][18][19], whereas MALDI-TOF-MS has recently been shown to be efficient in fast and complete identification of historic paint binders. In fact, since a decade the use of new mass spectrometric techniques based on soft ionization, such as MALDI [20][21][22][23][24][25][26][27] or Electrospray Ionization (ESI) [25][26][27][28][29][30][31][32][33][34][35][36] for investigation of organic materials as present in polychrome artefacts or archaeological finds has significantly increased.…”

Section: Introductionmentioning

confidence: 99%

Multi-technique chemical characterisation of a 12–13th-century painted Crucifix

Werf

Calvano

Laviano

et al. 2013

Microchemical Journal

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Study of ageing of ketone resins used as picture varnishes by pyrolysis–silylation–gas chromatography–mass spectrometry

Cited by 12 publications

References 17 publications

Characterization of Commercial Synthetic Resins by Pyrolysis-Gas Chromatography/Mass Spectrometry: Application to Modern Art and Conservation

Characterization of Commercial Synthetic Resins by Pyrolysis-Gas Chromatography/Mass Spectrometry: Application to Modern Art and Conservation

Effects of UV on Ageing Properties of some Nail Polishes, Acrylic Emulsions and Gloss Paints

Multi-technique chemical characterisation of a 12–13th-century painted Crucifix

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