FTIR spectroscopy was the first analysis performed, and PVC with U was the first combination of materials observed. Potential complexes with 1:7, 1:3, 1:2, and 1:1.38 PVC:U molar ratios were made and observed. Figure illustrates that the 1:7 PVC:U complex made via solution processing contains elements of both PVC and U, and that vibrational shifts from those of neat PVC occur in its spectra. This means some of the U bonds are interacting with PVC.