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单词	polyisobutylene
释义	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
随便看	abecedaria abecedarian abecedarians abecedarii abecedarium abecedarius abecedariuses abecedary abed abedder abeddest abeder abedest abeigh Abel Abel test Abelam abelams Abelard abele abeles abelia abelian abelias abelite

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