Figure 12

(A) Optical microscopy observation of PET-Ext oil from PET1993 before and after filtration showing particle presence in suspension. (B) FTIR spectra of extracted SF oil from PET1993 before and after filtration compared to PET spectra.
(A) Optical microscopy observation of PET-Ext oil from PET1993 before and after filtration showing particle presence in suspension. (B) FTIR spectra of extracted SF oil from PET1993 before and after filtration compared to PET spectra.