The most important indicator of an initiator's activity is its half-life, t 1/2, which is the time it takes for half of the initial initiator to decompose at a given temperature. For most initiators, the first-order decomposition kinetics are correct, and the half-life is given by: t 1/2 = ln 2 / k d Benzoyl peroxide The most important organic peroxide initiators to date are Benzoyl Peroxide (BPO). It consists of two benzoyl groups bridged by a peroxide bond. BPO is prone to symmetric fission (homogenous) to form two benzoyloxy groups: 2-4 benzoyl peroxide as initiator Some reaction formula The two fragments with unpaired electrons are called free radical initiators. After the free radicals are generated, the free radicals are initiated to react with the monomer units, resulting in a growing polymer chain. The reactivity

Toluene is used in large quantities as a solvent and as an additive for