polyisobutylene

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

* * *

/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.

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  • Butyl rubber — mdash;also known as polyisobutylene and PIB (C4H8)n is a synthetic rubber, a homopolymer of 2 methyl 1 propene. Polyisobutylene is produced by polymerization of about 98% of isobutylene with about 2% of isoprene. Structurally, polyisobutylene… …   Wikipedia

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