Abstract
An amphiphilic rod-coil ABC triblock copolymers using rigid oligo( para-phenyleneethynylene) (OPE) as the middle rod segment, poly(ethylene oxide)- block-oligo( para-phenyleneethynylene)- block-polystyrene (PEO- b-OPE- b-PS), was designed and successfully synthesized. In the synthetic route, a kind of macroinitiator, PEO- b-OPE-Br was achieved by stepwise coupling of iodo-terminated poly(ethylene oxide) and oligo( para-phenyleneethynylene) with amino end group, capping with 2-bromopropionyl bromide. Subsequently, from this macroinitiator atom transfer radical polymerization (ATRP) of styrene was performed to obtain PEO- b-OPE- b-PS. The resulting copolymers were characterized by nuclear magnetic resonance (NMR) and gel permeation chromatography (GPC). All these novel copolymers were affirmed to have well-defined structures and narrow molecular weight distributions.
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