(To see photos of apparatus used, please see Methods section)

• Vinyl chloride (Sigma Inc.)
• PLA-MePEG (Angiotech Inc.)
• PCL-MePEG (Angiotech Inc.)
• Di(2-ethylhexyl) phthalate
• Mettler PJ300 Balance
• Spatula
• Safflower oil
• ECTO
• Sterilized vials
• Microscope slides
• Teflon paper
• Forceps
• 60º oven
• 10 mL pipette
• Tin foil
• Distilled water
• Polysorbate 80
• hydrogen peroxide
• Novozym 435 (lipase B from Candida antarctica)
• toluene
• Thermo-mechanical analyzer (TI Q400)
• HPLC System
• 8452A Diode Array
Spectrophotometer