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trans-1,4 polyisoprene
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trans-1,4 polyisoprene

chemical compound
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Polyisoprene is a polymer of isoprene, a hydrocarbon with the formula C5H8. It is the primary component of natural rubber, as well as balata and gutta-percha. Polyisoprene can exist in different structural forms, or isomers, which determine its properties.12

The two most significant isomers are cis-1,4 polyisoprene and trans-1,4 polyisoprene. Natural rubber is almost exclusively the cis-1,4 isomer, known for its elasticity and toughness. Synthetic isoprene rubber (IR) is also primarily cis-1,4 polyisoprene and serves as a substitute for natural rubber, with common uses in tires and footwear.13

Trans-1,4 polyisoprene is the main isomer in gutta-percha and balata. These materials are crystalline, making them tough, hard, and leathery, historically used for cable sheathing and golf balls. Synthetic trans-1,4 polyisoprene is also produced for similar applications.13

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5 Britannica Sources
  1. polyisoprene
  2. major industrial polymers - Polyisoprene (natural rubber, NR; isoprene rubber, IR)
  3. polyisoprene
  4. isoprenoid - Structural classification of isoprenoids
  5. isoprene

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