Free Radical Polymerization Practice Problems

During the commercial polymerization of polyethylene, 2% peroxide is sometimes added to the mixture. This addition of some peroxide gives a stronger product with higher flexibility. Explain how this small quantity of peroxide can have such a large effect on the properties of polyethylene.

Write a mechanism for the polymerization of first three units of tetrafluoroethylene using an alkoxide as the chain initiator.