Study on aging behavior of polyethylene glycol under three wavelengths of ultraviolet light irradiation

Yanfei Wei · Herong Zhou · Tom Wu · Hongxiang Chen · Beisong Fang · Yang Zhao

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Cultural Heritage Materials Analysis Conservation Techniques and Studies Polymer Science and PVC

Abstract

H-NMR (nuclear magnetic resonance spectroscopy), the photochemical reactions for the generation of degradation products were proposed, and it was found that the degradation occurred at the C-H and C-O-C bonds on the main chain, forming a large number of ester and ethoxy structures. The aging degree of PEG2000 was evaluated from the perspective of surface morphology and chemical structure by gloss and FTIR spectroscopy, and it was found that the combination of gloss loss rate and carbonyl index was more suitable to evaluate the aging degree of the sample. The relevant theoretical research will provide reliable guidance for the preservation of polyethylene glycol in waterlogged wooden cultural relics.

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References

2018Halloysite Nanotubes Loaded with Calcium Hydroxide: Alkaline Fillers for the Deacidification of Waterlogged Archeological Woods 2018A comparative study of reinforcement materials for waterlogged wood relics in laboratory

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