Metal-Catalyzed Alkynylation of Brominated Polyphenylenes. Thermoset Precursorsof High Density Monolithic Glassy Carbon

摘要

The functionalization of brominated polyphenylenes with several alkynes isdescribed. The bromide groups on the polymer were replaced with terminal alkynes using a Pd/Cu catalyst system. Substitution of nearly all the original bromide locations was achieved. The functionalized polymers, freely soluble in THF, exhibited high char yields of up to 89% on thermolysis to 900 deg C under a nitrogen atmosphere. Several of the functionalized polymers, derived from