1 / 28

Polymers

Polymers. Professor: Michael Eastman Ph.D. Assistant: David Chavez-Flores. Polymer. Polymers are made up of many many molecules all strung together to form really long chains. Poly- means "many" and -mer means "part" or "segment". Polymers: Introduction.

may-mason
Download Presentation

Polymers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Polymers Professor: Michael Eastman Ph.D. Assistant: David Chavez-Flores

  2. Polymer • Polymers are made up of many many molecules all strung together to form really long chains. • Poly- means "many" and -mer means "part" or "segment".

  3. Polymers: Introduction • Polymer: High molecular weight molecule made up of a small repeat unit (monomer). • Homopolymer • A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A-A • Monomer: Low molecular weight compound that can be connected together to give a polymer • Oligomer: Short polymer chain • Copolymer: polymer made up of 2 or more monomers • Random copolymer: A-B-B-A-A-B-A-B-A-B-B-B-A-A-B • Alternating copolymer: A-B-A-B-A-B-A-B-A-B-A-B-A-B • Block copolymer: A-A-A-A-A-A-A-A-B-B-B-B-B-B-B-B

  4. Types of Polymers • Polymer Classifications • Thermoset: cross-linked polymer that cannot be melted (tires, rubber bands) • Thermoplastic: Meltable plastic • Elastomers: Polymers that stretch and then return to their original form: often thermoset polymers • Thermoplastic elastomers: Elastic polymers that can be melted (soles of tennis shoes) • Polymer Families • Polyolefins: made from olefin (alkene) monomers • Polyesters, Amides, Urethanes, etc.: monomers linked by ester, amide, urethane or other functional groups • Natural Polymers: Polysaccharides, DNA, proteins

  5. Common Polyolefins

  6. Polyesters, Amides, and Urethanes

  7. Natural Polymers

  8. Making polyvinyl acetate • Monomer - Vinyl Acetate • Solvent - Water • Initiator –Potassium Persulfate http://modules.utep.edu/Modules/polymer/Vinyl%20Acetate%20to%20PVAc/VA%20to%20PVAc.htm

  9. Overall Reaction

  10. Initiator Bond brakes homolytically

  11. Initiator

  12. End of the reaction

  13. Procedure • Place the exact amount of every reagent in a round bottom flask. http://modules.utep.edu/Modules/polymer/Vinyl%20Acetate%20to%20PVAc/VA%20to%20PVAc.htm • Vinyl Acetate 10 ml • Potassium Persulfate 0.1 g • Water 10 ml

  14. Set Up

  15. Final Product

  16. Nylon • Nylon is a generic designation for a family of synthetic polymers known generically as polyamides and first produced on February 28, 1935 by Wallace Carothers at DuPont . Nylon is one of the most commonly used polymers • Was used to replace Asian silk and hemp with nylon in parachutes in the World war II. • Was also used to make tires, tents, ropes, ponchos, and other military supplies

  17. Nylon

  18. Reaction Video Carleton Professor bob Burk from University, Ottawa, Canada http://www.youtube.com/watch?v=y479OXBzCBQ

  19. Demonstrations • Making a rubber ball • http://modules.utep.edu/Modules/polymer/Rubber%20Balls/Rubber%20Balls.htm • Diaper polymer • Teflon • Plastic bag • Carbon fiber video http://www.dailymotion.com/video/x4muy0_zoom-into-a-carbon-fiber_tech

  20. Science goals • Produce more application-specific polymers • Produce biodegradable polymers • Dispose correctly of the polymers • Recycle the existing polymers

  21. Bad disposal consequences

  22. Questions • Is cotton a synthetic or natural polymer?

  23. What kind of polymer is the white glue? • Homopolymer • Alternating copolymer • Block copolymer • Random copolymer • Besides of the monomer what else do you need to start a polymerization reaction? (a) A radical (b) An atom (c) Water

  24. Thank You • David Chavez • dchavez3@miners.utep.edu • 915-747-5849

More Related