All bioresorbable polymers can be custom produced with defined Chemical Structures, Molar Masses (Molecular Weight or Inherent viscosity) & Selective Terminal End groups. some are as below Poly (D, L-Lactide-co-Glycolide-co-PEG) (PLGA-PEG-PLGA) Poly(Caprolactone) (PCL) Poly(L-Lactide-co-Caprolactone) (PLCL). Poly(Glycolide) (PGA), PLGA-NH2 M-PEG-OH M-PEG-PLGA M-PEG-NH2