Synthesis Of Amphiphilic Diblock Copolymer And Its Self-Assemble Behavior

Amphiphilic diblock copolymer was synthesized by the monomers of methoxy polyethylene glycol(MePEG), 1,6-hexanediol and maleic anhydride in polycondensation using one-step and two-step methods. For one-step method, firstly, polyester containing carbon-carbon double bonds with properity moleculer weight were polymerized by the monomers of maleic anhydride and 1,6-hexanediol with toluene as solvent and p-Toluenesulfonic acid momohydrate as the catalyst, secondly, the polyester which was polymerized with acetic acid which extended 60% in mole number was actived by reaction with sulforous, at last, the amphiphilic diblock copolymer with carbon-carbon double bond was gained by the condensation polymerization of PEG(the high molecular weight monomer)and the polyester. For two-step method, solution polycondensation, melt polycondensation, mode of adding monomers and reaction time were studied on effect of molecular weight and its distribution. The GPC results shows that narrow molecular weight distribution was obtained in solution polycondensation. In addition, self-assemble behavior of amphiphilic diblock...