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Cationic RAFT Polymerization Using ppm Concentrations of Organic Acid
Author(s) -
Uchiyama Mineto,
Satoh Kotaro,
Kamigaito Masami
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201410858
Subject(s) - cationic polymerization , living cationic polymerization , chain transfer , reversible addition−fragmentation chain transfer polymerization , vinyl ether , polymerization , chemistry , polymer chemistry , living free radical polymerization , ionic polymerization , copolymer , monomer , living polymerization , vinyl acetate , radical polymerization , raft , polymer , organic chemistry
A metal‐free, cationic, reversible addition–fragmentation chain‐transfer (RAFT) polymerization was proposed and realized. A series of thiocarbonylthio compounds were used in the presence of a small amount of triflic acid for isobutyl vinyl ether to give polymers with controlled molecular weight of up to 1×10 5 and narrow molecular‐weight distributions (M w /M n <1.1). This “living” or controlled cationic polymerization is applicable to various electron‐rich monomers including vinyl ethers, p‐methoxystyrene, and even p‐hydroxystyrene that possesses an unprotected phenol group. A transformation from cationic to radical RAFT polymerization enables the synthesis of block copolymers between cationically and radically polymerizable monomers, such as vinyl ether and vinyl acetate or methyl acrylate.