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Impact strength polymers

  1. Oct 5, 2012 #1
    This is not a specific question. it's just common sense. all temp values in celsius.

    The impact values of polymers are definitely astonishing when i think at the molecular level

    it is said that increasing the molecular weight of the chains increase the impact strength.
    consider same polydispersity index (Mw / Mn).

    now consider a cross section where u are applying the impact.

    won't there be less number of chain ends to absorb the impact? so, impact strength should decrease right?

    also, how does Polycarbonate have such a high impact strength at 0. it's glass transition is 140 !!!!
     
  2. jcsd
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