CHEM 125A: FRESHMAN ORGANIC CHEMISTRY II - Lecture 16 - Professor J. Michael McBride
Isoprenoids, Rubber, and Tuning Polymer Properties
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
Please recommend us on Facebook, Twitter and more:
Other social media tools
Tell us what you think of Chemistry 2011 -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Chemistry2011 is an informational resource for students, educators and the self-taught in the field of chemistry. We offer resources such as course materials, chemistry department listings, activities, events, projects and more along with current news releases.
The history of the domain extends back to 2008 when it was selected to be used as the host domain for the International Year of Chemistry 2011 as designated by UNESCO and as an initiative of IUPAC that celebrated the achievements of chemistry. You can learn more about IYC2011 by clicking here. With IYC 2011 now over, the domain is currently under redevelopment by The Equipment Leasing Company Ltd.
Are you interested in listing an event or sharing an activity or idea? Perhaps you are coordinating an event and are in need of additional resources?
Within our site you will find a variety of activities and projects your peers have previously submitted or which have been freely shared through creative commons licenses.
Here are some highlights: Featured Idea 1, Featured Idea 2.
Ready to get involved? The first step is to sign up by following the link: Join Here. Also don’t forget to fill out your profile including any professional designations.