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Published February 8, 2000 | public
Journal Article

Synthesis of ABA Triblock Copolymers via a Tandem Ring-Opening Metathesis Polymerization: Atom Transfer Radical Polymerization Approach


The synthesis of poly(styrene)-b-poly(butadiene)-b-poly(styrene) (SBS) and poly(methyl methacrylate)-b-poly(butadiene)-b-poly(methyl methacrylate) (MBM) triblock copolymers with poly(butadiene) (PBD) segments containing 100% 1,4-microstructure is described. Bis(allyl chloride) and bis(2-bromopropionate) terminated telechelic PBD's were synthesized by the ring-opening metathesis polymerization (ROMP) of 1,5-cyclooctadiene in the presence of the corresponding difunctional chain transfer agents. These telechelic PBDs were subsequently used as difunctional macroinitiators for the heterogeneous atom transfer radical polymerization (ATRP) of styrene and methyl methacrylate to form SBS and MBM triblock copolymers. Triblock structure was confirmed by selective PBD degradation. In addition, the tandem ROMP−ATRP approach was successfully extended to a "one-pot" synthesis.

Additional Information

© 2000 American Chemical Society. Received 21 April 1999. Published online 21 January 2000. Published in print 1 February 2000. The financial support of the NSF is acknowledged. C.B. gratefully acknowledges the NSF for a predoctoral fellowship. T.M. acknowledges the Sekisui Chemical Co. for support.

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