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Structure of polyisobutene.

Polyisobutene is a class of organic polymers prepared by polymerization of isobutene. The polymers often have the formula Me3C[CH2CMe2]nX (Me = CH3, X = H, F). They are typically colorless gummy solids.

Polymerization is typically initiated with a strong Bronsted or Lewis acid. The molecular weight (MW) of the resulting polymer determines the applications. Low MW polyisobutene, a mixture of oligomers with Mns of about 500, is used as plasticizers. Medium and high MW polyisobutenes, with Mn ≥ 20,000, are components of commercial adhesives.[1]

See also[edit]


  1. ^ Kenneth S. Whiteley; T. Geoffrey Heggs; Hartmut Koch; Ralph L. Mawer; Wolfgang Immel (2005). "Polyolefins". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a21_487.