P-Doping and fiber spinning of poly(heptadiyne)s

Poly(4,4-bis[(3,5-diethoxybenzoyloxy)methyl]-1,6-heptadiyne) is synthesized via cyclopolymerization using modified Grubbs- and Schrock-type initiators. Doping with either I₂ or NO⁺ BF₄^- yields a conductive polymer with conductivity up to 1.4 × 10^-2 S cm^-1. The undoped amorphous conjugated polymer is spun into monofilament and multifilament fibers by a wet-spinning process. Fibers are collected on bobbins with a draw down ratio of 12 resulting in fiber diameters under 60 μm, characterized by scanning electron microscopy. X-ray diffraction data confirms that the amorphous structure of the polymer is preserved; no additional orientation of the polymer chains occurs during fiber spinning. Poly(4,4-bis[(3,5-diethoxybenzoyloxy)methyl]-1,6-heptadiyne) (poly-1) is synthesized via cyclopolymerization and p-doped to yield semiconductive fibers. Furthermore, poly-1 is spun into monofilament or multifilament fibers through a wet-spinning process. The resultant polymer fibers maintain an amorphous structure in X-ray diffraction patterns.