New dialkoxyamine-trithiocarbonate for the synthesis of multiblock copolymers through in tandem RAFT/NMP

Thomas, Claude St; Maldonado‐Textle, Hortensia; Cabello-Romero, Judith N.; Macossay, Javier; Zhang, Xujun; Esturau‐Escofet, Nuria; Guerrero‐Santos, Ramiro

doi:10.1039/c3py01270k

Cited by 16 publications

(17 citation statements)

References 50 publications

(27 reference statements)

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“…Similar counterintuitive changes in SEC retention times upon block extension, though likely due to yet another mechanism, have been reported by St Thomas et al during the characterization of a range of triand multiblock copolymers based on the temperature-responsive polymer poly(N-isopropylacrylamide) (PNIPAM) prepared via reversible deactivation radical polymerization (RDRP) techniques (entries 10-12 in Table 1). 39 4), with an associated ∼40% apparent reduction in the molecular weight from M n = 23 000 g mol −1 to 14 000 g mol −1 . This work 39 does not contain comparative values from, for instance, NMR or mass spectrometry (MS).…”

Section: Review Polymer Chemistrymentioning

confidence: 99%

“…39 4), with an associated ∼40% apparent reduction in the molecular weight from M n = 23 000 g mol −1 to 14 000 g mol −1 . This work 39 does not contain comparative values from, for instance, NMR or mass spectrometry (MS). The authors point out that both PNIPAM and PPEGA are known to be strongly susceptible towards hydrogen bonding (although the latter can only accept and not donate H-bonds).…”

Section: Review Polymer Chemistrymentioning

confidence: 99%

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The block copolymer shuffle in size exclusion chromatography: the intrinsic problem with using elugrams to determine chain extension success

2021

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Section: Review Polymer Chemistrymentioning

confidence: 99%

Section: Review Polymer Chemistrymentioning

confidence: 99%

The block copolymer shuffle in size exclusion chromatography: the intrinsic problem with using elugrams to determine chain extension success

2021

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“…Water was deionized before use (Purelab Classic UV, Elga LabWater). RAFT/NMP ( I ) dual chain transfer agent was synthetized as reported …”

Section: Methodsmentioning

confidence: 99%

Surface‐initiated nitroxide‐mediated polymerization of sodium 4‐styrene sulfonate from latex particles

Thomas

Cabello-Romero²,

Garcia‐Valdez

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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In this study, we report the use of a double-headed dialkoxyamine trithiocarbonate (I) capable of acting as chain transfer agent via reversible addition-fragmentation chain transfer polymerization or as initiator via nitroxide-mediated polymerization. It is worth mentioning that I was revealed as an effective dual chain transfer agent in the synthesis of multiblock copolymers via bulk and emulsion processes. In this article, we report the employing of I in dispersed systems to obtain amphiphilic multiblock copolymers and latexes. In this case, a water soluble macroagent of PAA previously synthetized was used in disperse media using a mixture of methanol/water (70:30, w/w). Stable latexes were obtained via polymerization-induced self-assembly and surface-initiated polymerization of SSNa from alkoxyamine-functionalized latex PAA-b-PS-b-PAA was also obtained V C 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 437-444 Additional Supporting Information may be found in the online version of this article.

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“…The chain-end functionalization of homopolymers and triblock copolymers prepared in solution departing from I was clearly demonstrated in our recent paper. 22 Here we showed that the alkoxyamine end-group of poly(acrylic acid) blocks can keep their integrity during the RAFT chain extension reaction (Scheme 2) with hydrophobic monomers if the temperature (80 °C) is kept below the cleavage temperature of the considered TEMPO-based alkoxyamines (ca 120°C). Consequently, latex particles as shown in Scheme 1 containing trithiocarbonate moieties (green dots) in their hydrophobic core and PAA chains end-capped with alkoxyamines (yellow dots) as hydrophilic shell.…”

Section: Surfactant-free Emulsion Raft Polymerization (Step 2)mentioning

confidence: 98%

Alkoxyamine-functionalized latex nanoparticles through RAFT polymerization-induced self-assembly in water

2015

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The use of a new symmetrical trithiocarbonate holding two alkoxyamine moieties (I), was explored in surfactant-free emulsion polymerization of styrene or n-butyl acrylate through reversible addition-fragmentation chain transfer (RAFT). I revealed as an effective chain transfer agent in the synthesis of well-defined end-functionalized poly(acrylic acid)s (PAA). These macro RAFT agents were further used in water for the preparation of amphiphilic triblock copolymers by polymerization induced self-assembly (PISA). The corresponding final latex particles decorated with alkoxyamine moieties were used to trigger out NMP polymerization of sodium 4-styrene sulfonate (SSNa) in water. The thermal activation of the surface alkoxyamines groups which had hitherto been dormant induced the formation of a double hydrophilic corona PAA-b-PSSNa and a sharp reorganization of latex particles.

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New dialkoxyamine-trithiocarbonate for the synthesis of multiblock copolymers through in tandem RAFT/NMP

Abstract: A new strategy for synthesizing multiblock copolymers comprising polystyrene, polyacrylates, poly(N-isopropylacrylamide), etc. is described.

Cited by 16 publications

References 50 publications

The block copolymer shuffle in size exclusion chromatography: the intrinsic problem with using elugrams to determine chain extension success

The block copolymer shuffle in size exclusion chromatography: the intrinsic problem with using elugrams to determine chain extension success

Surface‐initiated nitroxide‐mediated polymerization of sodium 4‐styrene sulfonate from latex particles

Alkoxyamine-functionalized latex nanoparticles through RAFT polymerization-induced self-assembly in water

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