Dissipative particle dynamics are used to investigate the self-assembly behavior of coil-rod-coil (CRC) triblock copolymers in selective solvents.In coil-selective solvent case

the morphological transitions of CRC solutions are induced by varying the rod length Lr and the coil length Lc.The increase of rod length makes the contact area between rods and solvents larger

and the interface energy enhanced.To reduce the contact area and interface energy

rod blocks tend toward aggregation.With increasing coil length

the coil stretching conformational entropy is increased

which results in the distribution of rod block aggregates more scattered.Two kinds of interesting phase structures (spherical phase and micellar phase) are observed by varying the solvent preference (aCS) and rod length Lr.With the solvent preference aCS varied from coil-selective to neutral and then to rod-selective

the rod-rich-domains in spherical micelle move from the interior to the surface and the number of rod-rich-domain layers is changed.Also

the rod length influences the internal structure of the spherical phase and induces the phase transition between the different spherical phases.The micellar phase includes segmented smectic micelle and rod helices-like micelle

where the rod blocks are arranged in the liquid crystal structure due to the anisotropy of the long rods.