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Dacron. Sanaz Leilabadi and Linda Edwards. Get to know Dacron. Trade name for Polyethylene Terephthalate aka PET, PETE, PETP Polyethylene Terephthalate is a resin of the polyester family that is used to make beverage, food and other liquid containers, synthetic fibers

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Sanaz Leilabadi and Linda Edwards

get to know dacron
Get to know Dacron
  • Trade name for Polyethylene Terephthalate


  • Polyethylene Terephthalate is a resin of the polyester family that is used to make beverage, food and other liquid containers, synthetic fibers
  • Clear, tough plastic with good gas and moisture barrier properties
chemically speaking
Chemically Speaking

Condensation Polymer

Polyethylene terephthalate is synthesized

by transesterification of two monomers:

Ethylene glycol and Dimethyl terephthalate


Transesterification is used in the synthesis of polyester, in which diesters undergo transesterification with diols to form macromolecules. In our case, dimethyl terephthalate and ethylene glycol react to form polyethylene terephthalate and methanol, which is evaporated to drive the reaction forward.
  • Transesterification reactions are often catalyzed by the addition of an acid or base.
  • Acids can catalyse the reaction by donating a proton to the alkoxy group, thus making it more reactive, while bases can catalyse the reaction by removing a proton from the alcohol, thus making it more reactive.
history of dacron
History of Dacron
  • PET: originally patented by British chemists
    • John Rex Whinfield and James Tennant Dickson in 1941 after early research by Wallace Carothers
  • Dupont used its nylon technology to improve the polyester fiber that was patented by the British
  • Dacron was created in 1950 by Dupont
what is dacron
What IS Dacron?
  • A polyester fiber used in clothing.
  • A yarn used in:
    • curtains
    • dress fabrics
    • high pressure fire hoses
    • men’s shirts
    • threads.
dacron products
Dacron Products
  • Boat sails
  • Antenna rope
  • Climbing ropes
  • Foam covers
  • Carpets and textiles
  • Furniture
  • Luggage
dacron in medicine
Dacron in Medicine
  • Cardiothoracic and Vascular grafts and implants
    • Aneurysm repair

(Thoracic and Abdominal Aorta)

    • Patch Angioplasty
    • Vascular grafts
  • Strong, flexible and treated

with collagen to keep blood

from soaking through

  • Chemically inert and thus well

tolerated inside the body

dacron then and now
Dacron- Then and Now
  • Dacron has come a long way since 1950
  • More commonly used today thanks to new technology
  • Price range varies depending on the product it as been made into
  • Intrinsic viscosity (thickness) of ~0.60 (fibers)
    • PET can range up to ~0.85 for tire cord
recycling dacron
Recycling Dacron
  • Methanolysis is an example

of reverse transesterification

and has been used to recycle

polyesters into individual monomers

  • Fully recyclable- when needed
  • Its polymer chains can be recovered for reuse.
health effects
One study showed that after imbedding polymer films of Dacron in rodents there was evidence of some malignant tumor formation, study was later deemed inadequate

Further research shows no short term or long term toxicity with use of Dacron

However, strong evidence of nausea, vomiting, central nervous system paralysis and kidney damage with prolonged exposure to ethylene glycol

Health Effects
dacron properties
Dacron Properties
  • High tensile strength, high resistance to stretching, both wet and dry, and good resistance to degradation by chemical bleaches and to abrasion which is why it is preferred for surgical use
  • High melting temperature of 496 degrees Fahrenheit (256 degrees Celsius), due to cross-linkage in synthesis of the fiber.
for more information
For more information
  • http://www.elmhurst.edu/~chm/vchembook/402condensepolymers.html
  • http://www.bicuspidfoundation.com/Aortic_Aneurysm_and_Dissection.html
  • http://www.bartleby.com/65/da/Dacron.html
  • http://www.nlm.nih.gov/medlineplus/ency/article/002345.htm
  • http://md1.csa.com/partners/viewrecord.php?requester=gs&collection=TRD&recid=CA6703713WC
  • http://education.yahoo.com/reference/encyclopedia/entry/Dacron
  • http://www.me.berkeley.edu/ME117/S05/finalproject/pdf/Vascular_Graft.pdf
  • http://www.alibaba.com/productsearch/Adhesive_Paper/10.html
  • http://www.surgical-tutor.org.uk/default-home.htm?tutorials/graft.htm~right
  • http://www.texdev.com/sld007.html
  • http://en.wikipedia.org/wiki/Dacron