Synthesis of comb polymers via grafting-onto macromoleeules bearing pendant diene groups via the hetero-diels-alder-raft click concept

Bousquet, A., Barner-Kowollik, C., & Stenzel, M. H. (2010) Synthesis of comb polymers via grafting-onto macromoleeules bearing pendant diene groups via the hetero-diels-alder-raft click concept. Journal of Polymer Science, Part A: Polymer Chemistry, 48(8).

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Abstract

Comb polymers were synthesized by the "graftingonto" method via a combination of Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerization and the hetero-DielsAlder (HDA) cycloaddition. The HDA reactive monomer trans, transhexa-2,4-dienylacrylate (ttHA) was copolymerized with styrene via the RAFT process. Crosslinking was minimized by decreasing the monomer concentration-whilst keeping monomer to polymer conversions low-resulting in reactive backbones with on average one reactive pendant diene groups for 10 styrene units. The HDA cycloaddition was performed between the diene functions of the copolymer and a poly(n-butyl acrylate) (PnBA) prepared via RAFT polymerization with pyridîn-2-yldithioformate, which can act as a dienophile. The coupling reactions were performed within 24 h at 50 °C and the grafting yield varies from 75% to 100%, depending on the number average molecular weight of the PnBA (3500 g mol-1 < Mn < 13,000 g mol-1) grafted chain and the reaction stoiehiometry. The molecular weights of the grafted block copolymers range from 19,000 g mol -1 to 58,000 g mol-1 with polydispersities close to 1.25. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A:.

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ID Code: 99236
Item Type: Journal Article
Refereed: Yes
Additional Information: Cited By :31
Export Date: 5 September 2016
CODEN: JPACE
Correspondence Address: Barner-Kowollik, C.; Preparative Macromolecular Chemistry, Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 18, 76128 Karlsruhe, Germany; email: christopherbarner-kowollik@kit.ed
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Keywords: Click chemistry, Comb polymers, Grafting-onto, Hetero-diels-alder cycloaddition, Reversible addition fragmentation chain transfer (RAFT), Coupling reaction, Diels-Alder, Dienophiles, Grafted chains, Grafting yield, Hetero-diels-Alder, Monomer concentration, Number average molecular weight, Poly(n-butyl acrylate), RAft polymerization, RAFT process, Reactive monomers, Reversible addition fragmentation chain transfer, Reversible addition-fragmentation chain transfer polymerization, Acrylics, Block copolymers, Chemical bonds, Copolymerization, Crosslinking, Directive antennas, Free radical polymerization, Grafting (chemical), Living polymerization, Olefins, Polydispersity, Polymers, Styrene, Synthesis (chemical), Cycloaddition
DOI: 10.1002/pola.23943
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: 07 Oct 2016 02:52

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