The unusually high Young’s modulus and tensile strength
coupled with the low density of single-walled nanotubes
(SWNT) have prompted investigations of these materials as
reinforcement in polymer composites.1 Of course, the effective
utilization of SWNT as reinforcement materials is not only
related to their intrinsic properties but also to characteristics
such as dispersion, alignment, and interfacial properties.2 In our
laboratory, we have been particularly interested in carbon
nanotubes as reinforcing fillers for thermoplastics. One unique
aspect of nanotubes is that they can retain a high aspect ratio
even when processed as melt-spun fibers, unlike typical micron
diameter fillers. The resultant morphologies in this situation,
especially in the case where the filler can nucleate crystallinity,
might be totally unique