2.5. Purification of the degraded PET samples
A weighted amount of degraded PET sample (1.0–1.2 g) was ini-
tially dissolved in 140 ml of chloroform (HPLC grade) at 55 C for
3 h under continuous stirring (200 rpm). When the polymer was
solubilized was re-precipitated into 500 ml of methanol at room temperature and filtrated under vacuum. Finally, the residue sam-ple was dried under vacuum for 5 days.