Block copolymers via macromercaptan initiated ring opening polymerization

Lefay, C., Glé, D., Rollet, M., Mazzolini, J., Bertin, D., Viel, S., Schmid, C., Boisson, C., D'Agosto, F., Gigmes, D., & Barner-Kowollik, C. (2011) Block copolymers via macromercaptan initiated ring opening polymerization. Journal of Polymer Science, Part A: Polymer Chemistry, 49(3).

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Poly(styrene) macromercaptanes (Mn = 1900, 3600, and 6100 g mol-1, PDI ≈ 1.2) derived from thiocarbonyl thio capped polymers prepared via reversible addition fragmentation chain transfer polymerization were employed to initiate the ring opening polymerization (ROP) of D,L-lactide under conditions of organo-catalyis employing 4,4-dimethylaminopyridine. Poly(styrene)-block-poly(lactide) polymers of number average molecular weights up to 25,000 g mol-1 (PDI ≈ 1.2 to 1.6) were obtained and characterized via multiple detection size exclusion chromatography (SEC) using refractive index as well as UV detection. In addition, diffusion ordered nuclear magnetic resonance and liquid chromatography at critical conditions (of both polystyrene as well as poly(lactide) were employed to assess the copolymers' structure. Furthermore, it was demonstrated that polyethylenes capped with a thiol moiety can also be readily chain extended in a ROP employing D,L-lactide, evidenced via NMR and high temperature SEC. This study indicates that the direct use of macromercaptantes is indeed a methodology to switch from a radical to a ROP process. © 2010 Wiley Periodicals, Inc.

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ID Code: 99277
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :15
Export Date: 5 September 2016
Correspondence Address: Lefay, C.; UMR 6264, Laboratoire Chimie Provence, Université de Provence, Avenue Escadrille Normandie-Niémen, Case 542, Marseille 13397 Cedex 20, France; email:
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Keywords: diblock copolymers, DOSY-NMR, LCCC, polyethylene-block-poly(lactide), polystyrene-block-poly(lactide), reversible addition fragmentation chain transfer (RAFT) polymerization, ring-opening polymerization, thiol initiated ring opening polymerization (ROP), Diblock copolymer, Reversible addition-fragmentation chain transfer polymerization, Block copolymers, Copolymerization, Free radical polymerization, Liquid chromatography, Nuclear magnetic resonance, Organic polymers, Polyethylenes, Polymers, Polystyrenes, Refractive index, Resonance, Size exclusion chromatography, Styrene, Ring opening polymerization
DOI: 10.1002/pola.24496
ISSN: 0887624X
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 22 Sep 2016 04:50
Last Modified: 05 Oct 2016 03:56

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