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‘Living’ radical polymerization of styrene with AIBN/FeCl 3 /PPh 3 initiating system via a reverse atom transfer radical polymerization process
Author(s) -
Chen XiaoPing,
Qiu KunYuan
Publication year - 2000
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 - 10.1002/1097-0126(200011)49:11<1529::aid-pi564>3.0.co;2-b
Subject(s) - living free radical polymerization , atom transfer radical polymerization , polymer chemistry , radical polymerization , reversible addition−fragmentation chain transfer polymerization , polymerization , cobalt mediated radical polymerization , chemistry , living polymerization , chain transfer , ionic polymerization , nitroxide mediated radical polymerization , dispersity , styrene , catalytic chain transfer , photochemistry , polymer , copolymer , organic chemistry
Well‐defined polystyrenes with an α‐C(CH 3 ) 2 (CN) and an ω‐chlorine atom end‐groups, and narrow polydispersity ( M n = 3000–4000 g mol −1 , M w / M n = 1.3–1.4) have been synthesized by a radical polymerization process using 2,2′‐azobisisobutyronitrile(AIBN)/FeCl 3 /PPh 3 initiation system. When the ratio of [St] 0 :[AIBN] 0 :[FeCl 3 ] 0 :[PPh 3 ] 0 is 200:1:4:12 at 110 °C, the radical polymerization is ‘living’, but the molecular weight of the polymers is not well‐controlled. The polymerization mechanism belongs to a reverse atom transfer radical polymerization (ATRP). Because the polymer obtained is end‐functionalized by a chlorine atom, it can then be used as a macroinitiator to perform a chain extension polymerization in the presence of CuCl/2,2′‐bipyridine catalyst system via a conventional ATRP process. The presence of a chlorine atom as an end‐group was determined by 1 H NMR spectroscopy. © 2000 Society of Chemical Industry