Combining Ring-Opening Multibranching and RAFT Polymerization: Multifunctional Linear–Hyperbranched Block Copolymers via Hyperbranched Macro-Chain-Transfer Agents

Autor:	Lutz Nuhn, Christoph Schüll, Rudolf Zentel, Holger Frey
Rok vydání:	2013
Předmět:	Polymers and Plastics Organic Chemistry Dispersity Chain transfer Methacrylate Inorganic Chemistry chemistry.chemical_compound Monomer chemistry Polymerization Polymer chemistry Materials Chemistry Copolymer Methacrylamide Reversible addition−fragmentation chain-transfer polymerization
Zdroj:	Macromolecules. 46:2892-2904
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma4002897
Popis:	The synthesis of a hyperbranched macro-chain-transfer agent for RAFT polymerization of functional methacrylate or methacrylamide monomers was achieved by selectively attaching one single CTA onto hyperbranched polyglycerol dendron analogues. The combination of ring-opening multibranching polymerization of glycidol and subsequent RAFT polymerization of the hyperbranched macro-chain-transfer agents created a new route to a variety of multifunctional linear–hyperbranched block topologies. All linear–hyperbranched block copolymers could be synthesized with controlled molecular weight (Mn = 3.2–43.7 kg/mol) and low polydispersity (PDI = 1.15–1.34). As first examples for this universal approach, we present block copolymer syntheses with thermoresponsive methacrylate (tri(ethylene glycol) methyl ether methacrylate) and biocompatible methacrylamide (2-hydroxypropylmethacrylamide). Because of the presence of dithiobenzoate esters at the end of each linear polymer chain end, selective end-group modification with fu...
Databáze:	OpenAIRE
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