| 摘要 |
The invention relates to a process for the continuous synthesis of a diene elastomer by means of n reactors r1 to rn, equipped with an internal stirring system, assumed to be perfectly stirred, and arranged in series, n varying from 2 to 15, preferably from 2 to 9, the reactor r1 being fed by an inlet solution comprising a solvent, one or more monomers, an anionic polymerization initiator and a polar agent, one or more of the reactors r2 to rn also being fed by reinjection of a purified solution comprising solvent and/or monomer(s), the purity of the or each reinjected solution being such that the proportion of the number of dead chains in the outlet stream from the reactor rn is less than 30%, preferably less than 10%, of the number of living chains initiated in the reactor r1, the temperature of each reactor varying from 20 to 150°C, preferably varying from 30 to 120°C and being greater than or equal to the temperature of the reactor that immediately proceeds it, the temperature of the reactor rn being greater than the temperature of the reactor r1, the diene elastomer obtained having a polydispersity index varying from 1.1 to 2. |
