Abstract
A two-step site transformation technique is presented to convert from living ring-opening metathesis polymerization (ROMP) to living anionic polymerization of unsaturated monomers. This method permits the synthesis of well-defined diblock copolymers of controllable molecular weight and narrow molecular weight distribution, combining ROMP and anionically polymerizable monomers. The technique employs a functional terminating agent to add a styryl group to the end of the ROMP chain. The end group is then metalated to yield an active site for anionic polymerization, so that the ROMP chain acts as a macroinitiator from which the anionic block is grown. Both polycyclopentene/ polystyrene and polynorbornene/polystyrene diblocks were successfully synthesized, and the method should be applicable to a broad range of monomers.
Original language | English (US) |
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Pages (from-to) | 5283-5288 |
Number of pages | 6 |
Journal | Macromolecules |
Volume | 41 |
Issue number | 14 |
DOIs | |
State | Published - Jul 22 2008 |
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry