A series of melt-blends were prepared from nylon 6 and a polyhedral oligomeric silsesquioxane (aminopropylisobutyl POSS) in order to develop an understanding of the role of processing in polymer property enhancement. Injection molded samples of the blends show decreases in mechanical properties, while melt-spun composite fibers of the same composition show improvements in modulus and strength, with the maximum increases occurring in the compositions containing 2.5 wt % POSS (and subsequent decreases in properties above that concentration). Dynamic mechanical analysis implies that there are POSS-polymer interactions on the molecular scale, and perhaps there is some level of molecularly dispersed POSS. The maximum property enhancement occurs 2.5%, coinciding with the maximum concentration before POSS phase separation occurs. Raman spectroscopy has been employed to characterize the specific interactions which are taking place between the POSS and polymer. Hypotheses to explain the specific mechanism of reinforcement from fiber spinning are discussed.