Abc-type triblock copolyacrylamides via copper-mediated reversible deactivation radical polymerization

Fehaid M. Alsubaie, Othman Y. Alothman, Hassan Fouad, Abdel Hamid I. Mourad

Research output: Contribution to journalArticlepeer-review

Abstract

The aqueous Cu(0)-mediated reversible deactivation radical polymerization (RDRP) of triblock copolymers with two block sequences at 0.0 C is reported herein. Well-defined triblock copolymers initiated from PHEAA or PDMA, containing (A) 2-hydroxyethyl acrylamide (HEAA), (B) N-isopropylacrylamide (NIPAM) and (C) N, N-dimethylacrylamide (DMA), were synthesized. The ultrafast one-pot synthesis of sequence-controlled triblock copolymers via iterative sequential monomer addition after full conversion, without any purification steps throughout the monomer additions, was performed. The narrow dispersities of the triblock copolymers proved the high degree of end-group fidelity of the starting macroinitiator and the absence of any significant undesirable side reactions. Controlled chain length and extremely narrow molecular weight distributions (dispersity ~1.10) were achieved, and quantitative conversion was attained in as little as 52 min. The full disproportionation of CuBr in the presence of Me6 TREN in water prior to both monomer and initiator addition was crucially exploited to produce a well-defined ABC-type triblock copolymer. In addition, the undesirable side reaction that could influence the living nature of the system was investigated. The ability to incorporate several functional monomers without affecting the living nature of the polymerization proves the versatility of this approach.

Original languageEnglish
Article number116
JournalPolymers
Volume14
Issue number1
DOIs
Publication statusPublished - Jan 1 2022

Keywords

  • Chain extensions
  • Controlled polymerization
  • Dispersity
  • Macroinitiator
  • Radical polymerization
  • Triblock copolyacrylamides
  • Undesirable side reaction

ASJC Scopus subject areas

  • General Chemistry
  • Polymers and Plastics

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