Aromatic tertiary amines

especially N

N-dimethyltoluidine

are effective sensitizer for photopoymerization of AN. The rate of polymerization is proportional to 1.62 power of [AN] and 0.62 power of [DMT]. The apparent activation energies of polymerization have been estimated to be 7.8kcal·mol-1 in bulk polymerization and 4.2kcal·mol-1 in DMF solution polymerization

respectively. The effect of solvent on the rate of polymerization was also studied The greater the polarity of the solvent

the faster the rate of polymerization is. Theinduction period increases and the rate of polymerization decreases with increasing amount of oxygen.