Deterioration of Dried Oil Films

Elm, A. C.

doi:10.1021/ie50470a021

Cited by 11 publications

(6 citation statements)

References 8 publications

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“…The gas-phase spectrum of dried linseed oil after irradiation evidences the formation of CO 2 , as mentioned in the literature (6,26).…”

Section: Resultssupporting

confidence: 54%

“…The results obtained allow selection of appropriate materials for cleaning paintings and give information to the art historian about artists' techniques (5). To our knowledge, only two valuable studies dealing with the photo-aging of dried oil films have been published, more than 40 yr ago (6,7). No studies of the reactions involved in photooxidation of these oils have been published.…”

mentioning

confidence: 99%

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Long‐term behavior of oil‐based varnishes and paints. Photo‐ and thermooxidation of cured linseed oil

Mallégol

Gardette

Lemaire

2000

J Americ Oil Chem Soc

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Thermooxidation at 100°C and photooxidation at wavelengths above 300 nm of dried oil films were evaluated. The chemical modifications of the networks were determined by infrared analysis coupled with gaseous treatments (NO, SF 4 , and NH 3 ). The dried films are rather stable in thermooxidation, whereas in photooxidation, important degradation of the network occurs with many chain scissions. This photoinstability results from the presence of crosslinks that are sensitive to radical attack because of the lability of the hydrogen atom on the tertiary carbons. The photooxidation reactions are fully described in this paper. Yellowing of the cured samples, observed with ultraviolet-visible and fluorescence spectrometries, rapidly is decreased by irradiation because the oil contaminants that are mainly responsible for the yellowness are photooxidized. On the contrary, yellowing slowly but continuously increases during thermooxidation at 100°C. SCHEME 2 SCHEME 3 SCHEME 4 FIG. 4. Absorbance of oxidation product bands (cm −1 ) as a function of irradiation time. SCHEME 5 SCHEME 6 SCHEME 7 FIG. 5. Evolution of ultraviolet-visible spectra (A) and fluorescence spectra (B) as a function of irradiation time.

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“…The gas-phase spectrum of dried linseed oil after irradiation evidences the formation of CO 2 , as mentioned in the literature (6,26).…”

Section: Resultssupporting

confidence: 54%

mentioning

confidence: 99%

Long‐term behavior of oil‐based varnishes and paints. Photo‐ and thermooxidation of cured linseed oil

Mallégol

Gardette

Lemaire

2000

J Americ Oil Chem Soc

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“…Kaufmann and Berger (2) observed that oil films sealed in ampules in the presence of oxygen required daylight for true film formation, while aging of similar films in darkness gave only soft gels. Elm (3) postulated that scissions in oil film structures which have been exposed to sunlight probably result in the formation of fragmentary products such as aldehydes, ketones, acid, and hydroxyl compounds. Such scission of a chain projecting from the main structual center probably produces small fragments without particular damage to the film.…”

Section: Introductionmentioning

confidence: 99%

“…3. A parallel band at 4.65 microns, indicating the presence of carbon monoxide, began to appear after 52 hours of exposure.…”

mentioning

confidence: 96%

Mechanism of Linseed Oil Film Degradation Under Ultraviolet Irradiation

Crecelius¹,

Alexander²,

Kagarise³

1956

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“…The yellowing of linseed oil, and other oils containing linolenic acid, as a result of autoxidation has a significant effect on the use of linseed oil in coatings. Yellowing is thought to result from the introduction of carbonyl groups and the rearrangement of carbon-oxygen and carbon-carbon bonds into conjugated chains (1)(2)(3)(4)(5), which may possibly incorporate pyrroles, through reaction with molecular nitrogen (6). Autoxidation is a free-radical process that proceeds at a slow rate because of the relative immobility of the fatty acid chains in media of high viscosity.…”

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confidence: 99%

The effect of dissolved transition metal complexes on the rate of yellowing of linseed oil

Chen

Hoggard

1999

J Americ Oil Chem Soc

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A number of metal complexes were examined as potential antiyellowing additives for linseed oil-based coatings. Yellowing was measured as the rate of increase of the absorbance at 400 nm of solutions of 20% linseed oil in toluene. Most metal complexes increased the yellowing rate, but 1,1-bis(diphenylphosphino)ferrocene retarded the rate by 50% over a wide concentration range, and some complexes caused nonlinear changes that might make them useful as additives.Paper no. J8960 in JAOCS 76, 279-282 (February 1999).

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Deterioration of Dried Oil Films

Cited by 11 publications

References 8 publications

Long‐term behavior of oil‐based varnishes and paints. Photo‐ and thermooxidation of cured linseed oil

Long‐term behavior of oil‐based varnishes and paints. Photo‐ and thermooxidation of cured linseed oil

Mechanism of Linseed Oil Film Degradation Under Ultraviolet Irradiation

The effect of dissolved transition metal complexes on the rate of yellowing of linseed oil

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