Abstract: The mesoscopic phase separation of block polymers, Pluronic 64(PL64)and Pluronic 25R4 (25R4), was investigated by dissipative particle dynamics(DPD)simulation, and the dynamics process of different aggregates in the solution was simulated. The results showed that: different morphologies were found in solutions of polymer with different concentrations including dispersive phase, spherical micelle, bicontinuous phase and so on. One conclusion is that the DPD simulation can be considered as an adjunct for the experiments, to provide information at the mesoscopic level.

Key words: Dissipative particles dynamics simulation, Mesoscopic simulation, 　Block polymer