Thermo-chemical interpretation of polymer degradation

A correlation has been established between the heat of depolymerization (ΔH) of vinyl polymers for going from solid polymer state to gaseous monomer state and the activation energy (E) of degradation. On this basis it has been shown that the rate controlling step in the degradation lies in the initiation step. Attempt has been made to correlate the E and ΔH with glass transition temperature (Tg) and melting temperature (Tm) of the polymers