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Polymer Analogous Reactions

Polymer Analogous Reactions

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Items (11)

  • In photo oxidation, how does branching occur?

    Photolysis creates oxy or hydroxy radicals.

  • In photo oxidation, how crosslinked product results?

    By recombination of radicals from different chains.

  • How is PVAc created?

    Vinylacetate with radical intiator.

  • In photo oxidation, how are peroxy radicals created?

    Oxygen reacts with radicals in the chain.

  • Example of analytical polymer degradation:

    Thermal decomposition.

  • In photo oxidation, what can peroxy radicals do?

    They can initiate radicals in other chains.

  • Example of chemical aging:

    Photo oxidation.

  • Why there is no network as a product if PVA is created with aldehydes?

    Because PVAc is in a coiled state so it cannot react with other chains.

  • Why can PVA not be directly created?

    Keton-Enol Tautomerism (Vinyl Alcohol reacts to Vinyl Keton).

  • Name possibilities thermal decomposition for acrylic polymer:

    1. Head to Head linked units can be broken at 160°C 2. Chain end bond broken at 270°C 3. Random scissions at weak bonds

  • How starts a photo oxidation?

    UV light breaks a bond and creates 2 radicals.