**4. Conclusions**

Several insights were gained upon the incorporation of C60 and EO3–C60 into Tecoflex films. The detection of the phase transition from simple cubic to face-centered cubic structure at approximately í14 °C, subsequent confirmation with XRD, and the decreased reactivity against simulants at increased C60 loading concentrations provide evidence of C60 aggregation in Tecoflex films. Conversely, no such evidence was observed to indicate that EO3–C60 was aggregating in Tecoflex films. Therefore, the covalent attachment of ethylene glycol tail to C60 results in an additive that exhibits improved solubility and dispersion in the hydrophobic polyurethane matrix of Tecoflex.

Surface decontamination challenges demonstrated the self-cleaning capability of Tecoflex films containing C60 and EO3–C60 additives. Decomposition products resulting from oxidation were observed in addition to a direct correlation between additive loading concentration and decomposition of surface-residing contaminants. Through correlation of trends observed from Demeton-*S* and CEPS decontamination challenges and byproduct analysis, modes of action were proposed for the decomposition pathways of both contaminants on the surface of polyurethane films.
