Fig. 1From: An efficient method for cell sheet bioengineering from rBMSCs on thermo-responsive PCL-PEG-PCL copolymer(A) Synthesis route for the fabrication of the PCL-PEG-PCL triblock copolymer via the ring-opening copolymerization of ε-caprolactone (ε-CL) initiated by polyethylene glycol (PEG) using stannous octoate (Sn (Oct)2) as a catalyst; (B) FTIR spectra of the copolymer; (C) 1H NMR spectra of the copolymer in CDCl3; (D) GPC profile of copolymerBack to article page