POLY 41 |
| Diblock copolymers containing polycyclopentene and polystyrene were synthesized using a newly developed method that combines two living polymerization techniques, ring-opening metathesis polymerization (ROMP) and anionic polymerization. The ROMP/anionic technique allows for the synthesis of well-defined block copolymers of controllable molecular weight and narrow molecular weight distribution. Our method utilizes a functional terminating agent to add a styrene-like endgroup to the ROMP chain. The endgroup is then metallated to convert it to an active site for anionic polymerization, so that the ROMP chain acts as a macromonomer from which the anionic block is subsequently grown. Although we demonstrate the technique primarily with polycyclopentene as the ROMP block and polystyrene as the anionic block, the method should be applicable to a wide range of ROMP and anionic monomers. |
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General Papers: Functional Materials
8:00 AM-12:00 PM, Sunday, August 19, 2007 Westin Boston Waterfront -- Douglas, Oral
Division of Polymer Chemistry |