Glycerol, 4-dimethylaminopyridine and triethylamine were obtained from Fisher Scientific (Loughborough, Leicestershire, UK). Sebacic acid was obtained from Alfa Aesar (Ward Hill, MA, USA). Dichloromethane, polyethylene glycol (Mw 8000), stannous octanoate, p-toluenesulfonic acid monohydrate, lactic acid (85%), polycaprolactone (Mw 80,000), 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP), polyethylene glycol diacrylate (Mw 8000) (PEGDA8000), 2-hydroxy-4′-(2-hydroxyethoxy)-2-methylpropiophenone (Irgacure 2959) and anhydrous magnesium sulphate (MgSO4) were obtained from Sigma Aldrich (Burlington, MA, USA).
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