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Polyisobutene

From Wikipedia, the free encyclopedia

Polyisobutene

Sample of polyisobutene with a molecular weight of ~1,000,000[1]
Names
Other names
Polyisobutylene; Poly(isobutene); Poly(isobutylene); PIB
Identifiers
ChEBI
ECHA InfoCard 100.108.750 Edit this at Wikidata
UNII
Properties
(C4H8)n
Molar mass Variable
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

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

Polymerization is typically initiated with a strong Brønsted 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.[2]

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.
This page was last edited on 25 October 2023, at 09:56
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