Crosslinking of Poly(L-lactide) by γ-Irradiation

The radiation crosslinking of poly(L-lactide) (PLLA) was investigated using triallyl isocyanurate (TAIC) as a crosslinking agent. The gel fraction of crosslinked PLLA increased with TAIC concentration and γ-ray dose. Crosslinking of PLLA started at low TAIC contents and low γ-ray dosage. Differential scanning calorimetry and dynamic mechanical thermal analysis revealed that PLLA was completely crosslinked at high weight ratios and high γ-ray doses.