“…Upon mixing and reaction with functionalized SWNTs, containing pendant, terminal amino groups, a dramatic improvement in the mechanical properties of the resulting epoxy polymer material in terms of strength and modulus was noted. [191] Second, a series of 2.5, 5, 7.5, and 10 wt% SWNT/polypropylene composite fibers, [192] formed by a benzoyl peroxide initiated in situ functionalization of SWNTs, possesses improved mechanical properties in tensile strength of 82.9, 89.8, 72.3, and 173.1%, and in the elastic modulus of 69.2, 99.7, 137.2, and 133.7%, respectively, over that of neat polypropylene fibers. Third, fluorinated SWNTs covalently bound to a polypropylene matrix can noticeably improve mechanical properties (e.g., >100% increase in tensile modulus) with respect to pristine tubes.…”