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Interactive video lesson plan for: 16. Isoprenoids, Rubber, and Tuning Polymer Properties

Activity overview:

Freshman Organic Chemistry II (CHEM 125B)

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.

00:00 - Chapter 1. IPP as the Carbon Electrophile in Isoprenoid Biosynthesis
13:56 - Chapter 2. Latex, Rubber, and Vulcanization
20:14 - Chapter 3. Understanding Vulcanization - Polymer Properties and Statistical Mechanics
35:34 - Chapter 4. Other Polymers and Their Properties
38:22 - Chapter 5. Synthetic Polymers and Free-Radical Copolymerization

Complete course materials are available at the Open Yale Courses website: http://oyc.yale.edu

This course was recorded in Spring 2011.

Tagged under: IPP,isoprenoid,terpene,steroid,rubber,caoutchouc,Charles Goodyear,vulcanization,John Gough,statistical mechanics,cross-linking,reputation,permanent wave,copolymerization

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