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Polyisobutene

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Polyisobutene

Sample of polyisobutene with a molecular weight of ~1,000,000
Names
Other names Polyisobutylene; Poly(isobutene); Poly(isobutylene); PIB
Identifiers
CAS Number
ChEBI
ECHA InfoCard 100.108.750 Edit this at Wikidata
UNII
CompTox Dashboard (EPA)
Properties
Chemical formula (C4H8)n
Molar mass Variable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Polyisobutene (polyisobutylene) is a class of organic polymers prepared by polymerization of isobutene. The polymers often have the formula Me3CnH (Me = CH3). They are typically colorless gummy solids.

Cationic polymerization, initiated with a strong Brønsted or Lewis acid, is the typical method for its production. 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.

See also

References

  1. OPPANOL B 100 by BASF
  2. 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.
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