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Direct Determination of Interchain Transfer Constants of Benzyl Acrylate to Poly(Ethyl Acrylate) by RAFT Polymerization and Polymer Chromatography
Author(s) -
Li Xiaohua,
Xue Yang,
Ma Xinyu,
Guo Ruiwei
Publication year - 2021
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.202100074
Subject(s) - polymerization , chain transfer , polymer chemistry , chemistry , reversible addition−fragmentation chain transfer polymerization , acrylate , bulk polymerization , radical polymerization , polymer , solution polymerization , monomer , raft , organic chemistry
Interchain transfer is an important side reaction in radical polymerization of acrylates and has significant effects on both reaction kinetics and the resulting polymer microstructures. In this study, an effective method for direct determination of the interchain transfer constant ( C tr ) is established via the combination of RAFT polymerization of a monomer in the presence of another prepared polymer and subsequent separation using polymer chromatography. The C tr of benzyl acrylate (BzA) to poly(ethyl acrylate) (PEA) is determined with benzyl N ‐carbazole dithiocarbamate (BCBD) as the RAFT agent and the effects of polymerization recipe, such as BzA/BCBD mole ratios, BzA/PEA mass ratios, and solvent amounts on C tr determination investigated. The results indicate that interchain transfer reactions show clear short chain radical effects in early stage of RAFT polymerization and the experimental recipes have little influence on the determination. The C tr values are in the range of 1–2 × 10 −4 at 90–120 °C and the activation energy of C tr at 47.8 kJ mol −1 .