- polyisobutylene
- \\|pälē+\ noun
Etymology: International Scientific Vocabulary poly- + isobutylene: 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
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/pol'ee uy'seuh byooht"l een'/, n. Chem.a polymer of isobutylene, used chiefly in the manufacture of synthetic rubber.Also, polyisobutene /pol'ee uy'seuh byooh"teen/.[1930-35; POLY- + ISOBUTYLENE]
Useful english dictionary. 2012.