Explanation

The percentage of the initiation dose participating in the initiation reaction to the decomposition amount of initiator. Another part of the initiator is lost due to induced decomposition and/or cage effect. The factors affecting the initiation efficiency mainly include the type of initiator, the type of monomer, solvent, temperature, and the viscosity of the system. The reaction of radical transfer to initiator is called induced decomposition. The induced decomposition reaction not only reduces the efficiency of initiator, but also reduces the degree of polymerization. In solution polymerization, initiator molecules with low concentration and the primary free radicals decomposed from them are always surrounded by a high viscosity polymer solution containing a large number of solvent molecules. Some of the primary free radicals cannot contact with monomer molecules and are more likely to transfer to initiator or solvent, so as to reduce. This phenomenon is called cage effect.

Classification