Structure and reactivity of free radicals trapped in mechanically degraded poly(vinylene carbonate)

Poly(vinylene carbonate) has been mechanically degraded. The structure and the reactivity of polymer radicals have been studied over the temperature range between ?70°C and 150°C. At ?70°C the following radicals are present:

The hyperfine splitting constants are: (I), a_H = 1.96 mT and a_H = 3.34 mT; (II), a_H¹ = 3.2 mT; (III), a_H = 1.25mT and a_H = 1.75mT. At +70°C, new radicals occur and the total spectrum becomes asymmetrical.