![]() The overall RAFT polymerization is generally divided into two sets of reactions, that is, the so-called pre-equilibrium, which involves the initial RAFT agent and includes the initialization of the living process, and the main equilibrium between growing and dormant polymer chains (see Scheme 1). 4īasic reaction steps of the Reversible Addition–Fragmentation Chain Transfer (RAFT) processes occurring in dithioester-mediated radical polymerization. Shortly after the introduction of RAFT, the CSIRO team proposed a reaction scheme for the process (see Scheme 1) and proved the occurrence of intermediate adduct radicals ( 3 and 6) by electron spin resonance (ESR) spectroscopy. Such information is mandatory for the design of novel mediating compounds as well as for modeling the polymerization process, whereby costly and time-consuming experiments may be minimized. Parallel to utilizing the RAFT process for polymer synthesis, a profound mechanistic and kinetic understanding of the individual RAFT-specific reactions was sought from the very beginning of RAFT to establish structure-rate correlations for specific RAFT agents. The success of this powerful technique is demonstrated by a constantly growing body of work that deals with various RAFT processes leading to advanced polymeric materials, as has comprehensively been reviewed very recently. 1 It is arguably the most versatile controlled polymerization process with respect to the types of monomers and the reaction conditions that enables the formation of polymer with controlled molecular weight, low polydispersity, and complex polymeric microstructure with relative ease. ![]() Reversible Addition–Fragmentation chain Transfer (RAFT) polymerization has developed into one of the leading controlled/living radical polymerization techniques since its invention by the CSIRO group in 1998. ![]()
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