reaktsioon, mille aktiivsed vahesaadused (sageli radikaalid) põhjustavad reaktsiooni järsu laienemise reaktsioonikeskkonnas ja kasvava kiiruse
a reaction in which one or more reactive reaction intermediates (frequently radicals) are continuously regenerated, usually through a repetitive cycle of elementary steps (the 'propagation step'). In chain polymerization reactions, reactive intermediates of the same types, generated in successive steps or cycles of steps
