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ARGET ATRP of acrylonitrile with ionic liquid as reaction medium and FeBr 3 /isophthalic acid as catalyst system
Author(s) -
Chen Hou,
Wang Chunhua,
Liu Delong,
Wang Min,
Ji Chunnuan
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34399
Subject(s) - acrylonitrile , isophthalic acid , ionic liquid , polymer chemistry , polyacrylonitrile , polymerization , tetrafluoroborate , monomer , atom transfer radical polymerization , materials science , catalysis , bifunctional , chemistry , copolymer , polymer , organic chemistry , polyester , terephthalic acid
Atom transfer radical polymerization using activators regenerated by electron transfer (ARGET ATRP) of acrylonitrile with FeBr 3 and isophthalic acid (IA) as catalyst and ligand, ascorbic acid (VC) as reducing agent, and ethyl 2‐bromoisobutyrate as initiator was approached for the first time in the presence of air in 1‐dodecyl‐3‐methylimidazolium tetrafluoroborate ([C 12 mim][BF 4 ]), 1‐octyl‐3‐methylimidazolium tetrafluoroborate ([C 8 mim][BF 4 ]), and 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([C 4 mim][BF 4 ]). The rate of polymerization in [C 12 mim][BF 4 ] was considerably faster than in [C 8 mim][BF 4 ] and [C 4 mim][BF 4 ]. With an increase of VC concentration, both the monomer conversion and the molecular weight distribution showed a trend of increase. Polyacrylonitrile (PAN) with higher molecular weight at 166,250 and broader distribution at 1.34 was successfully prepared with PAN as macroinitiator via ARGET ATRP in [C 12 mim][BF 4 ] in the presence of air. The resultant polyacrylonitrile fibers were obtained with the fineness at 1.15 dtex and the tenacity at 6.24 cN dtex −1 . Additionally, it was shown that [C 12 mim][BF 4 ] could be recycled and reused after simple purification and had no effect on the living nature of polymerization. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011