Solvolysis of acrylate-urethane coatings cured by electron-beam and UV radiation
Résumé
Solvolysis was investigated for two different types of thermosetting polyacrylate-urethane resin coatings. One type of resin was cross-linked by ultra violet (UV) radiation and the other by electron beam (EB). The cured coatings were deposited on aluminum sheets. Solvolysis was carried out with diethylene glycol (DEG) catalyzed by KOH.
The resins were characterized by FT-IR ATR spectroscopy prior to solvolysis. The kinetics of the solvolysis process were investigated, and the depolymerization products were studied by FT-IR ATR spectroscopy and size exclusion chromatography. The results show that total solvolysis is possible for both cured resins, albeit it is faster for resins cured by UV radiation.