SYNTHESIS AND PROPERTIES OF A POLY(DIPHENYLACETYLENE) CONTAINING CARBAZOLYL GROUPS

1-(p-N-Carbazolylphenyl)-2-phenylacetylene (p-CzDPA) was polymerized b y TaCl5-co-catalyst systems (cocatalysts: n-Bu(4)Sn, Et(3)SiH, and 9BB N) to produce acetone-insoluble polymers in about 60-70% yields. Poly( p-CzDPA) was a yellowish-orange solid, most part of which was soluble in toluene, chloroform, etc., and its weight-average molecular weights were around 4 X 10(5). This polymer formed a tough film by solution c asting, and was thermally very stable (the onset temperature of weight loss in TGA in air 470 degrees C). The oxygen permeability coefficien t of the polymer at 25 degrees C was lower than two barrers. The prese nt polymer showed photoconductivity and redox activity. (C) 1995 John Wiley and Sons, Inc.