J. Kennedy, J. Hinlicky
Mar 1, 1965
Citations
0
Influential Citations
23
Citations
Journal
Polymer
Abstract
Abstract The cationic polymerization of norbornadiene [bicyclo-(2,2,1)-heptadiene-2,5] has been investigated. Polymerizations using aluminium chloride catalyst in ethyl chloride and methylene chloride solvent were carried out at −123, −78, 0 and +40°C. Only the product synthesized at −123°C was completely soluble, the rest contained considerable amounts of crosslinked material. The structure of the soluble product was determined by infra-red and n.m.r. spectroscopy. The repeat unit of the polymer is a 2,6-disubstituted nortricyclene unit The polymerization apparently proceeds by an intramolecular transannular reaction between carbon atoms 3 and 5