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What would the products of photolysis degredation of PET plastic be?

  1. Oct 22, 2013 #1
    Interested in this because plastic drinking bottles have a taint to them when left out in the sun. I gather its from UV degredation of the PET plastic.

    I'd like to find a catalyst that would allow the PET byproducts to be non water soluble/sequester or even evaporate.
     
  2. jcsd
  3. Oct 22, 2013 #2

    Astronuc

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    Staff: Mentor

    One has to balance that degradation against the desire for non-leaching of the plastic into the contents and long shelf life.

    The exterior surface could be less critical than the interior surface, but it's difficult to treat the interior in a bottle given the geometry.

    Here's some research on PET and UV.
    Physico-chemical modifications of the DBD and UV irradiation treatments on the PET and PET+TiO2 films
    http://134.147.160.41/ispcdocs/ispc16/CostPapers/497.pdf

    See also
    http://en.wikipedia.org/wiki/Ultraviolet#Degradation_of_polymers.2C_pigments_and_dyes
     
    Last edited: Oct 22, 2013
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