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Micellar RAFT/MADIX Polymerization.

Cécile Barthet^1,2, James Wilson³, Arnaud Cadix³

¹Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 9, France.

ACS Macro Letters

|June 2, 2022

Summary

This summary is machine-generated.

RAFT polymerization using the RAFT/MADIX technique allows for controlled synthesis of associative polymers from acrylamide and 4-tert-butylstyrene. An oligo-acrylamide chain transfer agent offers superior control over molecular weight distribution.

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Published on: June 20, 2019

Area of Science:

Polymer Chemistry
Materials Science

Background:

Micellar copolymerization enables the synthesis of complex polymer architectures.
Controlled radical polymerization techniques are crucial for precise polymer synthesis.

Purpose of the Study:

To investigate the RAFT/MADIX technique for micellar copolymerization of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid sodium salt, and 4-tert-butylstyrene.
To evaluate the control offered by different chain transfer agents on polymer properties.
To maintain and extend the associative character of the synthesized polymers.

Main Methods:

Utilized RAFT/MADIX (Reversible Addition-Fragmentation chain Transfer / Macroscopic부산ization by Degassing and Irradiation) technique.
Performed micellar copolymerization in the presence of sodium dodecyl sulfate.
Employed oligo-acrylamide chain transfer agent (PAm7-XA1) and Rhodixan A1 for comparison.

Main Results:

Achieved well-controlled molecular weight distributions in the resulting polymers.
Demonstrated superior polymerization control with PAm7-XA1 compared to Rhodixan A1.
Preserved the associative nature of the polymers under RAFT conditions.
Successfully extended polymer chains to create block copolymers with associative segments.

Conclusions:

The RAFT/MADIX technique is effective for controlled micellar copolymerization.
Oligo-acrylamide chain transfer agents provide enhanced control in this system.
The synthesized associative polymers can be further functionalized into block copolymers.