Figure 2

UV–vis and DSC characterization of PP films with 2% additives. (a) UV–vis spectra during UV radiation of 280–400 nm and HEV radiation of 400-500 nm. (b) UV–vis spectra during NIR radiation of 780–2500 nm. (c) DSC curve of PP films with 2% additives during cooling process. (d) DSC curve of PP films with 2% additives during 2nd heating process.