Fig. 3
From: Conversion among photo-oxidative products of polypropylene in solid, liquid and gaseous states

Carbonyl index of CPP and UPP with aging time. a calculated from ATR spectra; b calculated from transmission spectra
From: Conversion among photo-oxidative products of polypropylene in solid, liquid and gaseous states
Carbonyl index of CPP and UPP with aging time. a calculated from ATR spectra; b calculated from transmission spectra