Value of the Data •The data is valuable for informing researchers the topographical changes after blending the conventional PET or R-PET with either PLA or Chitosan biopolymers. •Data is valuable for comparing the type of fracture after tensile test between different ratio of R-PET/PLA, PET/PLA, PET/Chitosan and R-PET/chitosan. •The data will benefit to the studies related to the environment to understand how the morphological properties can be managed and increase the biodegradability in R-PET and R-PET systems with biopolymers. •The roughness data acquired from AFM measurements of PET/PLA, PET/PLA, PET/Chitosan and R-PET/chitosan are of additional value and will help to other studies to compare the topography and evaluate the changes on surface roughness according to the degradation time.