FTIR spectra of the PHA film were analyzed following the microbial degradation resulting decrease in intensity of some
bonds and formation of new bonds. Increase in the band intensity might be due to the production of monomers via break down of the polymer. The decrease in the intensity of the bands around 1127–1140 cm−1 assigned to the stretching vibration of C–O–C group, indicated degradation of the polymer chain.