Electrical anisotropy of horizontally oriented diblock copolymers

Conductive polymer blends prepared by in situ polymerization of pyrrole: A review

“…Ishizuetal. (117,118) synthesized poly(styrene-b-2-vinylpyridine) diblock copolymers with alternating lamellae stacked parallel to the polymer-air surface. Exposure of the block copolymer to alkyl halide vapors produced semiconductive materials in which the conductivity varied by approximately six orders of magnitude parallel and perpendicular to the plane of the lamellar stack.…”

Block copolymer as a template for electrically conductive nanocomposites

“…[1][2][3][4][5] However, its applications have been restricted by several problems such as poor mechanical properties and poor processability. [6][7][8][9][10][11][12][13] To overcome these drawbacks of Ppy, composites prepared by simply blending Ppy with various homopolymers were introduced. 7 In this situation, macroscopically connected Ppy domains become electrical current paths.…”

“…[6][7][8][9][10][11][12][13] To overcome these drawbacks of Ppy, composites prepared by simply blending Ppy with various homopolymers were introduced. 7 In this situation, macroscopically connected Ppy domains become electrical current paths. Because the theoretically predicted percolation limit is 16 vol% for a physical blend consisting of Ppy and polymers, the amount of Ppy added to conventional polymers should be over 16 vol% to exhibit sufficient conductivity because any macroscopically connected path does not exist below this concentration.…”

“…12,13 Recently, block copolymers have drawn considerable attention as new templates for in situ polymerization of conductive nanocomposites. 6,7,13,16 Block copolymers exhibit well-ordered microdomains of 10-100 nm due to incompatibility and connectivity between two block segments. 17 Once electrically conductive polymers are selectively incorporated into the microdomains of one block, these microdomains can be used as an electrical path.…”

Block and star block copolymers by mechanism transformation. VI. Synthesis and characterization of A4B4 miktoarm star copolymers consisting of polystyrene and polytetrahydrofuran prepared by cationic ring‐opening polymerization and atom transfer radical polymerization

“…In the radical cis-trans isomerization of these diblock macromonomers, four-arm to eight-arm amphiphilic A n B n star-shaped copolymers were produced. Using a similar method, Ishizu and coworkers [25][26][27] reported the syntheses of (PSt) n (PtBuMA) n and (PSt) n (P2VP) n miktoarm star copolymers. The former were prepared by the sequential anionic polymerization of styrene (St), 1,4-divinyl benzene, and tert-butyl methacrylate; the synthesis of the latter involved the anionic polymerization of St, isoprene, and 2-vinyl pyridine.…”