Organic base catalyzed oligomerization of propylene carbonate and bisphenol A: Unexpected polyether diol formation

A useful oligomer of polyether diol was obtained from the oligomerization of propylene carbonate and bisphenol A initiated by organic base under mild condition. The new oligomers were characterized by MALDI-TOF MS, IR, 1H NMR, 13C NMR spectra, TG-DTA analysis, and viscosity determination.