Reversible chain transfer catalyzed polymerization in miniemulsion systems with tetraiodomethane as a catalyst. Issue 44 (7th September 2022)

• Record Type: Journal Article
• Authors: Kitayama, Yukiya; Sadakane, Masaya; Harada, Atsushi
• Is Part Of: Polymer chemistry. Volume 13:Issue 44(2022)
• Page Start: 6179
• Page End: 6186
• Publication Date: 2022-09-07
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/d2py01019d
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Tetraiodomethane (CI4 ) is an effective catalyst in reversible chain transfer catalyzed polymerization (RTCP) of methacrylate monomers in miniemulsion polymerization systems (miniemulsion RTCP). Abstract : Reversible deactivation radical polymerization (RDRP) in aqueous miniemulsion polymerization systems is an effective strategy for the precision synthesis of various polymers in the particle state. In reversible chain transfer catalyzed polymerization (RTCP), a catalyst accelerates the chain-transfer reaction between iodide compounds and radical species. In this study, tetraiodomethane (CI4 ) was used in the RTCP of methacrylate monomers in miniemulsion polymerization systems (miniemulsion RTCP). Well-controlled poly(methyl methacrylate) (PMMA) was synthesized using a miniemulsion RTCP with CI4 . Nonionic and cationic surfactants were used as the stabilizers for miniemulsion RTCPs. Additionally, the degree of polymerization of PMMA was controlled by changing the molar ratio of the monomer to the chain-transfer agent. A chain-extension test indicated that the synthesized PMMA exhibited high chain-end fidelity. Furthermore, a series of experiments confirmed the effectiveness of CI4 as a catalyst for the miniemulsion RTCP of well-defined methacrylate polymers in a particulate state using various methacrylate monomers.