Synthesis of High‐Molecular‐Weight Brush Polymers via RAFT Polymerization within the Micellar Nanoreactor of a PEG‐Based Macromonomer

Li, Na; Liu, Weiwei; Xu, Likun; Xu, Jianxiong; Du, Jingjing

doi:10.1002/macp.201400379

Cited by 5 publications

(2 citation statements)

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“…Li et al reported that under aqueous RAFT conditions, the polymerization of styrenic PEG macromonomers proceeded at an enhanced rate compared to polymerization in organic solvents. 53 The polymerizations were therefore carried out in aqueous solution using the water-soluble RAFT agent 3-((((1carboxyethyl)thio)carbonothioyl)thio)propanoic acid (PA-PATC).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Bottlebrush synthesis was achieved via the grafting-through method using RAFT polymerization to exert control over the molecular weight of the resulting copolymers. Li et al reported that under aqueous RAFT conditions, the polymerization of styrenic PEG macromonomers proceeded at an enhanced rate compared to polymerization in organic solvents . The polymerizations were therefore carried out in aqueous solution using the water-soluble RAFT agent 3-((((1-carboxyethyl)thio)carbonothioyl)thio)propanoic acid (PAPATC).…”

Section: Resultsmentioning

confidence: 99%

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Cationic Bottlebrush Copolymers from Partially Hydrolyzed Poly(oxazoline)s

et al. 2021

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Cationically charged bottlebrush copolymers were produced by hydrolysis of poly(2-ethyl-2-oxazoline) (PEtOx). The cationic ring-opening polymerization of EtOx was initiated using a styrene derivative to produce PEtOx macromonomers with two different lengths. After detailed characterization, these macromonomers were polymerized via reversible addition-fragmentation chain transfer (RAFT) polymerization in a grafting-through process. The length of the bottlebrush backbone was varied, and it was found that a good control over the polymerization could be retained up to backbone DP 50. Hydrolysis of PEtOx repeating units under acidic conditions afforded cationic bottlebrushes, with a defined charge content that could be adjusted by changing the hydrolysis reaction time. Bottlebrush copolymers were analyzed in detail using size-exclusion chromatography, small-angle neutron scattering, and atomic force microscopy indicating a cylindrical topology and an increasing flexibility with increasing chain length.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Cationic Bottlebrush Copolymers from Partially Hydrolyzed Poly(oxazoline)s

et al. 2021

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Macromonomers

Neugebauer

2016

Encyclopedia of Polymer Science and Technology

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Macromonomers are large monomers containing repeating units and a polymerizable or functional group. Strategies such as grafting through (polymerization) and grafting to (coupling) are known as the macromonomer methods for the synthesis of functional “smart” polymers with nonlinear topologies and precisely designed properties. The variety of structures includes mono‐ and difunctional (homo‐ and heterofunctional), single‐, double‐, and triple‐tailed, star‐ and dendron‐tailed polymers. Well‐defined macromonomers are commonly applied as surface modifiers, stabilizers, compatibilizers, emulsifiers, and as building blocks of polymacromonomers, that is block and graft copolymers (molecular brushes), star copolymers (miktoarm stars), branched polymers, and networks. This articles overviews various types of macromonomers, synthetic methods for their preparation, representative examples, and the most common applications.

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