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polyisobutylene

[pol-ee-ahy-suh-byoot-l-een] /ˌpɒl iˌaɪ səˈbyut lˌin/
noun, Chemistry
1.
a polymer of isobutylene, used chiefly in the manufacture of synthetic rubber.
Also, polyisobutene
[pol-ee-ahy-suh-byoo-teen] /ˌpɒl iˌaɪ səˈbyu tin/ (Show IPA)
.
Origin of polyisobutylene
1930-1935
1930-35; poly- + isobutylene
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for polyisobutylene
  • polyisobutylene is a synthetic rubber that is impermeable to air.
  • polyisobutylene is a colorless to light yellow viscoelastic material.
  • As a fuel additive, polyisobutylene has detergent properties.
  • polyisobutylene is used in some formulations as a thickening agent.

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