One-step synthesis of poly(alkyl methacrylate)-b-polyester block copolymers via a dual initiator route combining RAFT polymerization and ROP

Yu, Young Chang; Li, Guoxue; Kang, Hyun Uk; Youk, Ji Ho

doi:10.1007/s00396-012-2788-6

Cited by 31 publications

(28 citation statements)

References 30 publications

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“…Li et al devised a synthetic method consisting of simultaneous RAFT and ROP, of styrene and lactide, respectively, to prepare a diblock macromonomer that was subsequently used in a ring‐opening metathesis polymerization “grafting through” reaction to produce double‐brush copolymers. Recently, Youk's group reported the successful one‐pot synthesis of poly(alkyl methacrylate)‐ block ‐polyester and poly(vinylpyrrolidone)‐ block ‐polyester copolymers …”

Section: Introductionmentioning

confidence: 99%

Controlled One‐Pot Synthesis of Polystyrene‐block‐Polycaprolactone Copolymers by Simultaneous RAFT and ROP

Freitas

Trindade

Muraro

et al. 2013

Macro Chemistry & Physics

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A convenient one-pot method for the controlled synthesis of polystyrene-block -polycaprolactone (PS-b -PCL) copolymers by simultaneous reversible addition-fragmentation chain transfer (RAFT) and ring-opening polymerization (ROP) processes is reported. The strategy involves the use of 2-(benzylsulfanylthiocarbonylsulfanyl)ethanol (1) for the dual roles of chain transfer agent (CTA) in the RAFT polymerization of styrene and co-initiator in the ROP of ε -caprolactone. One-pot poly merizations using the electrochemically stable ROP catalyst diphenyl phosphate (DPP) yield well-defi ned PS-b -PCL in a relatively short reaction time (≈4 h; M n = 9600−43 600 g mol −1 ; M w / M n = 1.21−1.57). Because the hydroxyl group is strategically located on the Z substituent of the CTA, segments of these diblock copolymers are connected through a trithiocarbonate group, thus offering an easy way for subsequent growth of a third segment between PS and PCL. In contrast, an oxidatively unstable Sn(Oct) 2 ROP catalyst reacts with (1) leading to multimodal distributions of polymer chains with variable composition.

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Section: Introductionmentioning

confidence: 99%

Controlled One‐Pot Synthesis of Polystyrene‐block‐Polycaprolactone Copolymers by Simultaneous RAFT and ROP

Freitas

Trindade

Muraro

et al. 2013

Macro Chemistry & Physics

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“…14,15 The major obstacle to the one-step synthesis of block copolymers using dual initiators for RAFT polymerization and ringopening polymerization (ROP) is the interference between the ROP catalysts and RAFT polymerization reactions. In our previous study, 16 the one-step synthesis of well-defined poly(alkyl methacrylate)-b-poly(d-valerolactone) (PAM-b-PVL) and PAM-b-poly(e-caprolactone) (PAM-b-PCL) block copolymers was conducted at 30 C for the first time using 4-cyano-1-hydroxypent-4-yl dithiobenzoate (ACP-RAFT) as a dual initiator for RAFT polymerization and ROP. Diphenyl phosphate (DPP) was used as the ROP catalyst.…”

Section: Introductionmentioning

confidence: 84%

One‐step synthesis of block copolymers using a hydroxyl‐functionalized trithiocarbonate RAFT agent as a dual initiator for RAFT polymerization and ROP

Kang

Shin

et al. 2012

J. Polym. Sci. A Polym. Chem.

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A range of well-defined block copolymers were synthesized using 4-cyano-4-(dodecylsulfanylthiocarbonyl)sulfanylpentanol (CDP) as a dual initiator for reversible additionfragmentation chain transfer (RAFT) polymerization and ring-opening polymerization (ROP) in a one-step process. Styrene, (meth)acrylate, and acrylamide monomers were polymerized in a controlled manner for one block composed of vinyl monomers, and d-valerolactone (VL), e-caprolactone (CL), trimethylene carbonate (TMC), and L-lactide (LA) were used for the other block composed of cyclic monomers. Diphenyl phosphate was used as a catalyst for the ROP of VL, CL, and TMC, and 4-dimethyamino pyridine for the ROP of LA. These catalysts did not interfere with RAFT polymerization and the synthesis of various block copolymers proceeded in a controlled manner. CDP was found to be a very useful dual initiator for a one-step synthesis of various block copolymers by a combination of RAFT polymerization and ROP. V C 2012 Wiley Periodicals, Inc. J.

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“…The solvent was then removed under reduced pressure and the crude product (viscous orange color oil) was purified by column chromatography using hexane/ethyl acetate (9:1 v/v) to afford an orange-colored viscous oil (yield = 65.4%). 1 …”

Section: Synthesis Of Cdpsmentioning

confidence: 97%

“…Recent studies have reported the synthesis of amphiphilic diblock copolymers using dual initiators for reversible addition-fragmentation chain transfer (RAFT) polymerization of a vinyl monomer and ring-opening polymerization (ROP) of a cyclic monomer in an one-step or one-pot procedure [1][2][3][4][5]. The block derived from the vinyl monomer was hydrophilic and the other block derived from the cyclic monomer was hydrophobic.…”

Section: Introductionmentioning

confidence: 99%

One-step synthesis of poly(2-oxazoline)-based amphiphilic block copolymers using a dual initiator for RAFT polymerization and CROP

Yu¹,

Cho²,

Yu³

et al. 2014

Polymer

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One-step synthesis of poly(alkyl methacrylate)-b-polyester block copolymers via a dual initiator route combining RAFT polymerization and ROP

Cited by 31 publications

References 30 publications

Controlled One‐Pot Synthesis of Polystyrene‐block‐Polycaprolactone Copolymers by Simultaneous RAFT and ROP

Controlled One‐Pot Synthesis of Polystyrene‐block‐Polycaprolactone Copolymers by Simultaneous RAFT and ROP

One‐step synthesis of block copolymers using a hydroxyl‐functionalized trithiocarbonate RAFT agent as a dual initiator for RAFT polymerization and ROP

One-step synthesis of poly(2-oxazoline)-based amphiphilic block copolymers using a dual initiator for RAFT polymerization and CROP

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