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Penultimate Unit and Solvent Effects on 2:1 Sequence Control During Radical Copolymerization of N ‐Phenylmaleimide With β ‐Pinene
Author(s) -
Yamamoto Daisuke,
Matsumoto Akikazu
Publication year - 2012
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.201200421
Subject(s) - copolymer , chemistry , tetrahydrofuran , reactivity (psychology) , monomer , polymer chemistry , solvent , steric effects , radical , solvent effects , organic chemistry , photochemistry , polymer , medicine , alternative medicine , pathology
Copolymers with a 2:1 regulated sequence of N ‐phenylmaleimide with β ‐pinene units (AAB‐type repeating units) are produced during radical copolymerization. The monomer reactivity ratios are determined using the penultimate unit model, and it is demonstrated that they vary depending on the solvent used (tetrahydrofuran, 1,2‐dichloroethane, 2,2,2‐trifluoroethanol, and perfluoro‐ tert ‐butanol) and the copolymerization temperature (0–100 °C). The interaction of the PhMI repeating units with solvents lead to the production of the 2:1 controlled sequence and a significant change in the relative reactivity of the PhMI radicals by polar and steric effects.