Well-defined poly(styrene-b-2-vinylpyridine) diblock copolymers (about 50 wt% polystyrene blocks) were prepared by sequential anionic addition. The cast films showed a tendency where the alternating lamellar structures of two microphases were orientated with their interfaces parallel to the surface that contacts the air or Teflon substrate. Poly(2-vinylpyridine) microdomains were not only quaternized but also effectively crosslinked with 1,4-diiodobutane vapour. Subsequently, colloidal silver was introduced into quaternized poly(2-vinylpyridine) phases by the reduction of silver iodide. The element distributions on the vertical section of the modified films were measured by means of energy-dispersive X-ray spectrometer and transmission electron microscopy. These materials showed a highly anisotropic conductivity with ca. six orders of magnitude.
Посилання на статтю:
Anisotropic conductivity on diblock copolyrners with lamellar microdomains / Koji Ishizu*, Yoshikuni Yamada and Reiko Saito // Polymer. – 1993. – Vol 34. – P. 2256-2262.