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CHEM 125b - Lecture 16 - Isoprenoids, Rubber, and Tuning Polymer Properties
Lecture 16 - Isoprenoids, Rubber, and Tuning Polymer Properties
Overview
Isoprenoid or terpene natural products, that seem to be made from isoprene (2-methylbutadiene), are formed by oligomerization of electrophilic isopentenyl pyrophosphate (IPP). Latex, the polymer of IPP, became commercially important when Charles Goodyear, a New Haven native, discovered how to vulcanize rubber. Statistical mechanics explains such curious properties of rubber as contraction upon heating when tightly stretched. Specific chemical treatment confers useful properties on a wide variety of polymers, including hair, synthetic rubber, and plastics. The structure of copolymers demonstrates non-Hammond behavior and ionic character in the transition state for free-radical polymerization.
Resources
Professor McBride's website resource for CHEM 125b (Spring 2011)
https://webspace.yale.edu/chem125/
This website may include third-party materials pertaining to relevant topics, provided for the user's convenience. Yale does not control or take responsibility for the content of any off-site pages or linked sites.