2.3.1. Fourier Transforms Infrared Spectroscopy (FT-IR)

Vector-33 FTIR spectrometer (Bruker, Germany) was used to carry out FT-IR measurement to analyze the reaction between PBS, PBAT, and maleic anhydride. The scanning range varied from 4000 to 500 cm−<sup>1</sup> with a resolution of 16 cm−<sup>1</sup> .
