Abstract
Rhus vernicifera and Rhus succedanea lacquers, which are used as a surface coating for wood, porcelain and metalware in Japan, were investigated using two-stage pyrolysis gas chromatography/mass spectrometry (Py-GC/MS). Urushiol and laccol components were detected in each lacquer film by pyrolysis at 400 °C. These are the monomers, and are characteristic of Rhus vernicifera and Rhus succedanea lacquer films. In addition, alkenes, alkanes, alkenylphenols and alkylphenols were detected by pyrolysis at 500 °C after pyrolysis at 400 °C. Based on these results, the pyrolysis mechanisms of the respective lacquer films were considered. The pyrolysis products were from the urushiol and laccol polymers. These pyrolysis products clearly reflect the structure of each lacquer film.
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