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Synthesis of Well‐Defined Rod‐Coil Diblock Copolymer of Aromatic Polyether and Polyacrylonitrile by Chain‐Growth Condensation Polymerization and Atom Transfer Radical Polymerization
Author(s) -
Ajioka Naomi,
Yokoyama Akihiro,
Yokozawa Tsutomu
Publication year - 2008
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700862
Subject(s) - polyacrylonitrile , polymer chemistry , copolymer , atom transfer radical polymerization , chain transfer , polymerization , materials science , reversible addition−fragmentation chain transfer polymerization , acrylonitrile , living free radical polymerization , radical polymerization , dispersity , polymer , composite material
The synthesis of diblock copolymers of aromatic polyether and polyacrylonitrile (PAN) was conducted by chain‐growth condensation polymerization (CGCP) and atom transfer radical polymerization (ATRP) from an orthogonal initiator. When CGCP for aromatic polyether was carried out from a PAN macroinitiator obtained by ATRP with an orthogonal initiator, decomposition of the PAN backbone occurred. However, when ATRP of acrylonitrile was conducted from an aromatic polyether macroinitiator obtained by CGCP followed by introduction of an ATRP initiator unit, the polymerization proceeded in a well‐controlled manner to yield aromatic polyether‐ block ‐polyacrylonitrile (polyether‐ b ‐PAN) with low polydispersity. This block copolymer self‐assembled in N,N ‐dimethylformamide to form bundle‐like or spherical aggregates, depending on the length of the PAN units in the block copolymer.