polyisobutylene
noun
poly·isobutylene
¦pälē+
: a polymer of isobutylene varying from a viscous oil to a sticky or rubbery solid
especially : an elastomer (C4H8)x that is formed at a low temperature (as −100° C) in the presence of a metal halide catalyst (as boron trifluoride) and that cannot be vulcanized unless a small amount of a proportion of isoprene or other diolefin has been incorporated with the isobutylene before polymerization compare diisobutylene, synthetic rubber
Word History
Etymology
International Scientific Vocabulary poly- + isobutylene