Hyperbranched polymers as scaffolds for multifunctional reversible addition–fragmentation chain-transfer agents: A route to polystyrene-core-polyesters and polystyrene-block-poly(butyl acrylate)-core-polyesters

Jesberger, Martin, Barner, Leonie, Stenzel, Martina H., Malmstrom, Eva, Davis, Thomas P., & Barner-Kowollik, Christopher (2003) Hyperbranched polymers as scaffolds for multifunctional reversible addition–fragmentation chain-transfer agents: A route to polystyrene-core-polyesters and polystyrene-block-poly(butyl acrylate)-core-polyesters. Journal of Polymer Science Part A: Polymer Chemistry, 41(23), pp. 3847-3861.

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Abstract

Polydisperse hyperbranched polyesters were modified for use as novel multifunctional reversible addition-fragmentation chain-transfer (RAFT) agents. The polyester-core-based RAFT agents were subsequently employed to synthesize star polymers of n-butyl acrylate and styrene with low polydispersity (polydispersity index < 1.3) in a living free-radical process. Although the polyester-core-based RAFT agent mediated polymerization of n-butyl acrylate displayed a linear evolution of the number-average molecular weight (M.) up to high monomer conversions (>70%) and molecular weights [M-n > 140,000 g mol(-1), linear poly(methyl methacrylate) equivalents)], the corresponding styrene-based system reached a maximum molecular weight at low conversions (approximate to30%, M-n = 45,500 g mol(-1), linear polystyrene equivalents). The resulting star polymers were subsequently used as platforms for the preparation of star block copolymers of styrene and n-butyl acrylate with a polyester core with low polydispersities (polydispersity index < 1.25). The generated polystyrene-based star polymers were successfully cast into highly regular honeycomb-structured microarrays. (C) 2003 Wiley Periodicals, Inc.

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116 citations in Scopus
109 citations in Web of Science®
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ID Code: 97506
Item Type: Journal Article
Refereed: Yes
Keywords: reversible addition-fragmentation chain transfer (RAFT); kinetics (polym.); hyperbranched; dendrimers; honeycomb-structured arrays
DOI: 10.1002/pola.10976
ISSN: 1099-0518
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute for Future Environments
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2003 Wiley Periodicals, Inc.
Deposited On: 28 Jul 2016 22:47
Last Modified: 28 Jul 2016 22:47

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