Polymer Engineering Interview Questions and Answers

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Question - Consider A Homogeneous Zirconium Catalyst In Which Two Cyclopentadienyl Ligands Are Connected By A —ch2–ch2— Bridge. Which Symmetry Elements Does The (bridged-cp2)zr Moiety Possess? What Is The Expected Tacticity Of The Polypropylene Produced Using This Type Of Catalyst? Why?

Answer -

The (bridged-cp2)Zr moiety possesses both C2Zr catalyst discussed in Session 5, it would be expected to produce atactic polypropylene, since the methyl group on the propylene would have no up/down preference.

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