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Initialization of RAFT Agents with Different Leaving Groups – Determination of the Transfer Coefficients
Author(s) -
Drache Marco,
SchmidtNaake Gudrun
Publication year - 2008
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200851114
Subject(s) - raft , chain transfer , initialization , polymerization , reversible addition−fragmentation chain transfer polymerization , radical polymerization , styrene , chemistry , transfer agent , polymer chemistry , computer science , copolymer , organic chemistry , polymer , programming language
The leaving group of the initial RAFT agent is one key factor during the initialization period of the RAFT polymerization. Benzyl‐, Phenylethyl‐ and Cumyl Dithiobenzoate RAFT mediated bulk polymerization of styrene at 120 °C was investigated by direct measurement of the concentration of the RAFT agent and determination of the molecular weight in the initial phase of the RAFT polymerization using Size Exclusion Chromatography (SEC). The initialization period can be described by means of two transfer coefficients that are determined by the stability of the free‐radical leaving group. By means of a Monte Carlo simulation the RAFT initialization process was characterized and the transfer coefficients from the experimental data were determined.