Synthesis and Self-Assembly of Brush-Rod Diblock Copolymers in the Mixed Solvent of THF/H2O
نویسندگان
چکیده
Two amphiphilic brush-rod block copolymers, PEGMA37-b-MBPS87 and PEGMA37-b-MBPS141, were synthesized via ATRP of poly(ethylene glycol)monomethyl ether methacrylate (PEGMA) and (þ)-2,5-bis[40-((S)-2-methylbutoxy)phenyl]styrene (MBPS). The self-assembly of the copolymers in THF/H2O was induced by different methods. Spheres were dominant morphologies of PEGMA37-b-MBPS87 regardless of the initial concentration and the rate ofwater addition. Increase of the length of hydrophobic block, as in PEGMA37-bMBPS141, led to the coexistence of primary spheres, large compound spherical and rod-likemicelles at a slow water addition rate. Injecting water into the THF solution of PEGMA37-bMBPS141 quickly or pouring the THF solution into large amount of water resulted only in the formation of spheres.
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