Only two notable shifts were recorded. One PVC shift occurred from 2965 to 2970 cm -1 and one TMU shift from 1630 to1640 cm -1 (Figure ). Both of these shifts are not major at ~5-10 cm -1 . It is known that TMU evaporates, so when vacuum filtration was performed, most of the TMU might have left the precipitate. Nevertheless, TMU did also affect the Tg of PVC, as illustrated in Figure , where PVC's Tg was lowered by roughly 30° C degrees to a range between 50-61° C. The results of our preliminary mechanical property measuremens performed on PVC, PVC U, and PVC-AC films are presented in Table . With respect to the neat PVC films, it is clear that the PVC-U and PVC-AC complexed films are softer. It should be noted that no segregation of U or AC from PVC was observed in the complexed films tested for mechanical properties. Physical mixtures of PVC and TMU were produced and resulted in novel observations. One gram of PVC powder was weighed and TMU (a liquid U derivative) was slowly added and manually mixed. This process created a clear colorless gel, which seemed to have vastly different mechanical properties than our other more rigid solution processed PVC:U, AC, and TMU samples. FTIR was not performed, instead DSC was utilized, and an "apparent Tg" for the 1:1.38 PVC:TMU physical mixture was measured to be about 75° C, ~10-15° C degrees below the Tg of pure PVC (Figure ). Other ratios of PVC to TMU physical mixtures were analyzed with DSC, but none of them evidenced a Tg lower than pure PVC (See Appendices H, I, and J in the Supplementary Material). DSC might not be the best method for analyzing these gels, because the samples are PVC gels swollen with TMU. At room temperature (23° C), the PVC-TMU gel was probed with a glass rod and exhibited reversible elastic deformation upon extension. Consequently, the swollen PVC chains are able to change their conformations and are moving, though not irreversibly, as is usually assumed to be the case for neat amorphous polymers above their glass transition temperatures. Clearly the thermal signature seen in Figure at ~ 75° C cannot be attributed to the typical softening observed in neat amorphous polymers at and above their Tgs. The mechanical properties of the PVC-TMU gel samples are vastly different from pure rigid PVC. They are nonflowing after their creation, and remained soft and reversibly elastically deformable.