PMSE 498 |
| We report a unique strategy for synthesis of AB2-type star-shaped ethylene-styrene block copolymers by combining Pd-diimine catalyzed ethylene living polymerization with ATRP of styrene. Narrow-distributed telechelic polyethylene (PE) with one end capped with two identical ATRP sites were directly prepared in one step by living polymerization of ethylene using a tailor-designed functionalized Pd-diimine catalyst. The telechelic PE was then used as a macroinitiator for the ATRP of monomers like styrene (St), yielding the AB2-type star-shaped block copolymer having one PE arm (A block) and two identical PSt arms (B blocks). Using this strategy, a variety of well-defined polymers with PE and PSt arms having controlled lengths can be conveniently synthesized. |
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New Concepts in Polymeric Materials
8:00 AM-10:55 AM, Thursday, August 23, 2007 Westin Boston Waterfront -- Grand Ballroom D, Oral
Division of Polymeric Materials: Science & Engineering |