Ring-opening metathesis polymerization of new α-norbornenyl poly(ε-caprolactone) macromonomers

✍ Scribed by D. Mecerreyes; D. Dahan; Ph. Lecomte; Ph. Dubois; A. Demonceau; A. F. Noels; R. Jérôme

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 216 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990715)37:14<2447::aid-pola19>3.0.co;2-9

✦ Synopsis

Poly(-caprolactone) (PCL) macromonomers capped by a polymerizable norbornene end-group have been synthesized and (co)polymerized by ring-opening metathesis with formation of graft copolymers and polymacromonomers. ␣-Norbornenyl PCL macromonomers have been synthesized by ring opening polymerization (ROP) of -caprolactone (CL) initiated by 2-diethylaluminoxymethyl-5-norbornene. Copolymerization of these PCL macromonomers with norbornene and polymerizable derivatives has been catalyzed by the [RuCl 2 (p-cymene)] 2 PCy 3 /(trimethylsilyl)diazomethane complex yielding a series of poly(norbornene)-graft-poly(-caprolactone) copolymers. These new graft copolymers have been characterized by a set of analytical methods, i.e., SEC, 1 H-NMR, FTIR, DSC, and TGA. Furthermore, PCL macromonomers have been polymerized into high molecular weight comb chains of narrow molecular weight distribution (M w /M n ϭ 1.10) within high yields (90%).