Poly-2,3- and 2,7-Bicyclo[2.2.1]hept-2-enes: Preparation and Structures of Polynorbornenes

Abstract

Abstract The polymerization of norbornene in the presence of either radical catalysts having a short half-life at the polymerization temperature or ethylaluminum dichloride yields a saturated polymer having a rearranged structure with 2,7 linkages. Polymerization in the presence of either Pd(C6H5CN)2Cl2 or Ziegler-Natta catalysts containing TiCI4 and A1R3 or R2 A1C1 yields a saturated polymer with 2,3 linkages.