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Reverse atom‐transfer radical polymerization of acrylonitrile catalyzed by FeCl 3 /iminodiacetic acid
Author(s) -
Hou Chen,
Liu Junshen,
Wang Chengguo
Publication year - 2006
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1934
Subject(s) - polymer chemistry , polymerization , acrylonitrile , polyacrylonitrile , atom transfer radical polymerization , chemistry , iminodiacetic acid , radical polymerization , chain transfer , solution polymerization , molar mass distribution , catalysis , living free radical polymerization , reversible addition−fragmentation chain transfer polymerization , living polymerization , organic chemistry , polymer , copolymer , chelation
FeCl 3 coordinated by iminodiacetic acid (IMA) was Changed used for the first time as the catalyst in azobisisobutyronitrile‐initiated reverse atom‐transfer radical polymerization (ATRP) of acrylonitrile (AN). An FeCl 3 to IMA ratio of 1:2 not only gave the best control of molecular weight and its distribution but also provided a rather rapid reaction rate. The effects of solvents on the polymerization of AN were also investigated. The rate of the polymerization in N , N ‐dimethylformamide (DMF) was faster than in propylene carbonate or toluene. The molecular weight of polyacrylonitrile agreed reasonably well with the theoretical molecular weight in DMF. The rate of polymerization increased with increasing polymerization temperature and the apparent activation energy was calculated to be 54.8 kJ mol −1 . The reverse ATRP of AN did not show obvious living characteristics with CuCl 2 instead of FeCl 3 . Copyright © 2005 Society of Chemical Industry