Referring to Figure , an interesting trend was found, which refuted the expectation that "the more plasticizer used, the more Tg will be lowered." DSC revealed that the sample, with a 1:7 PVC:U molar ratio, which evidenced a clear melting peak for the uncomplexed excess U, had an average Tg of 63° C, which is higher than that of both the 1:3 and 1:2 complexes. It can be concluded that the most effective molar ratio in PVC:U complexes is between 1:2 to 1:3, since their Tgs are both in the low 50° Cs (See Figure and Appendices E, F, and G in the Supplementary Material). It should be noted that there are no observed neat U or U-IC melting peaks expected at ~135° C in the PVC:U DSC scans except for the 1:7 sample which apparently has excess U that is not complexed with PVC and has crystallized . Complexes with less U show endothermic peaks at ~110° C indicating decomplexation or melting of the PVC-U complexes. After experimenting with U as a plasticizer for PVC, its TMU derivative and the related compound AC were considered next. Potential complexes were created with 1:2 and 1:1.38 PVC-AC mole ratios. FTIR and DSC analyses were performed on both samples and showed promising results. Significant shifts were seen in the 1:2 PVC-AC sample's FTIR spectrum, especially in the region between 3400 and 3200 cm -1 and around 1300-1400 cm -1 (See Figure ). The difference between the 1:2 PVC-AC peaks and peaks in those regions from neat AC vary from 11-46 cm -1 and even reached 94 cm -1 . By comparison, the 1:1.38 PVC:AC complex spectrum had smaller shifts, but they were still indicating that PVC was complexing with AC. That sample had noticeable shifts in the 3300-3340 cm -1 and 1385-1680cm -1 regions. The shifts between the 1:1.38 PVC:AC peaks and AC peaks in those two regions varied from 4, 12, and up to 27 cm -1 as seen in Figure . Their DSC results were consistent with the magnitudes of their observed vibrational peak shifts, because the Tg of PVC (85-88° C) was dramatically lowered to 45° C in the 1:2 PVC:AC complex, while the Tg of the 1:1.38 PVC:AC complex was about 50° C (See Figures and). This 5 °C Tg difference (50 to 45° C) is not large, but it appears to be consistent with that found for the 1:2 and 1:3 PVC:U complexes. The 1:2 molar ratio of PVC:U or AC seems to be the most effective in lowering their Tgs. There is also an indication for decomplexation or melting of neat AC in the DSC scans of the 1:2 PVC:AC sample (See Figure ).