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Supramolecular complexes of C 60 and C 70 encapsulated within the cavity created by the helical superstructure of syndiotactic poly(methyl methacrylate) (s-PMMA) were aligned by elevated-temperature electrospinning. Using 13 C solid-state NMR, encapsulation of C 60 within the nanotubular cavity was confirmed by downfield chemical shifts and significantly shorter spin–spin...
Fibers from polypropylene and polypropylene/vapor grown nano carbon fiber composite have been spun using conventional melt spinning equipment. At 5wt% nano carbon fiber loading, modulus and compressive strength of polypropylene increased by 50 and 100%, respectively, and the nano carbon fibers exhibited good dispersion in the polypropylene matrix as observed by scanning electron microscopy.
Magnetic field induced Freedericksz transition in the twist geometry of an initially well-aligned nematic solution of a rod-like polymer, polyhexylisocyanate (PHIC), is studied. For the angle α between the magnetic field and the unperturbed director n 0 , one finds a homogeneous distortion if this angle is less than 45°. For angles greater than 45°, the reorientation is inhomogeneous, and...
The use of oriented macroscopic roughness to enhance the effective adhesion between two immiscible polymers was demonstrated. Bilayer specimens of polycarbonate and poly(styrene-co-acrylonitrile) (SAN) were produced with rough interfaces by scribing grooves of varying depths and spacings into the polycarbonate (PC) before joining the layers. The SAN, having a significantly lower glass transition...
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