Non-PRO English to French Tech/Engineering Chemistry; Chem Sci/Eng synthèse de particules de polymères

For the batch process, the mixture of monomers is introduced in one shot just before or after introduction of one or part of the initiator system
For the semi-continuous process, the monomer mixture is added in multiple shots or continuously in parallel to the initiator addition (the initiator is also added in multiple shots or continuously) during a defined period of addition
qqc de mieux que "ajouts multiples" ?