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POLYPROPYLENE! - PowerPoint PPT Presentation

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POLYPROPYLENE!. One Popular Polymer!. What’s so great about POLYPROPYLENE?. High Melting Point (dishwasher safe!) Intermediate crystallinity: tough without being brittle High resistance to fatigue (living hinge) Chemically Inert CHEAP to MAKE!!!. Polypropylene comes from Propylene!.

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One Popular Polymer!

what s so great about polypropylene
What’s so great about POLYPROPYLENE?
  • High Melting Point (dishwasher safe!)
  • Intermediate crystallinity: tough without being brittle
  • High resistance to fatigue (living hinge)
  • Chemically Inert
  • CHEAP to MAKE!!!

1. Zeigler-Natta polymerization:

TiCl3 + Al(C2H5)2Cl, or TiCl4 + Al(C2H5)3


2) Kaminsky Catalysts: Metallocene

A metallocene is a

positively charged metal ion sandwiched between two negatively charged cyclopentadienyl anions.

the era of polypropylene polyethylene
The era of Polypropylene & Polyethylene

Courtesy of Mr. Hogan and Mr. Banks

how much polypropylene is out there
How much polypropylene is out there?

PP generation in 1996 (tons)

Source: EPA, Characterization of Municipal Solid Waste in the United States: 1997 Update

* Includes plastics in disposable diapers, clothing, footwear, etc.

** Other plastics packaging includes coatings, closures, caps, trays, shapes, etc.

longevity 100s of years
Longevity: ? 100s of years

“Plastics numbered 3-7 have very limited markets, and the cost to separate and ship these small volume plastics is in excess of $12,000 per month.” - Madison pride recycling program Madison, WI

The only way to get rid of it is to burn it.

Roughly 25,000 tons were recycled in 1996

(that’s 1%)



  • “Polypropylene”, Wikipedia. http://en.wikipedia.org/wiki/Polypropylene, 11/1/05
  • “Plastics Recycling Information Sheet”, Waste Online. http://www.wasteonline.org.uk/resources/InformationSheets/Plastics.htm, 11/7/05
  • “Plastics Recycling” and “Polypropylene PP”, British Plastics Federation. http://www.bpf.co.uk/bpfindustry/process_plastics_recycling.cfm and http://www.bpf.co.uk/bpfindustry/plastics_materials_polypropylene_PP.cfm, 11/7/05
  • “Polypropylene”, Macrogalleria. http://www.pslc.ws/mactest/pp.htm 11/1/05
  • “Polypropylene PP”, Bird Box Company, http://www.birdboxcompany.com/en/pp_data.htm, 11/7/05
  • “Recycling Symbols (US)”, Earth Odessy LLC. http://www.earthodyssey.com/symbols.html 11/7/05
  • “Stonyfield Farm and Environmental Packaging”, Stonyfield Farm. http://www.stonyfield.com/EarthActions/EnvironmentalPackaging.cfm., 11/7/05
  • “UV Damage to Polymers”, UN Environment Program. http://www.gcrio.org/UNEP1998/UNEP98p62.htmlhttp://www.p2pays.org/ref/02/0162230.pdf 11/7/05
  • “Chemical of the Week: Polymers” Science is Fun. http://scifun.chem.wisc.edu/chemweek/POLYMERS/Polymers.html, 11/1/05
  • “Plastic: PP (#5) Commodity Profile of market Assessment”, 1998. North Carolina Department of Environment and Natural Resources/ Division of Pollution Prevention and Environmental Assistance.