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Atom Transfer Radical Polymerization of N ‐Isopropylacrylamide
Author(s) -
Masci Giancarlo,
Giacomelli Laura,
Crescenzi Vittorio
Publication year - 2004
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.200300140
Subject(s) - polymer chemistry , polymerization , atom transfer radical polymerization , chain transfer , copolymer , radical polymerization , chemistry , living free radical polymerization , ionic polymerization , reversible addition−fragmentation chain transfer polymerization , solution polymerization , living polymerization , polymer , organic chemistry
Summary: Controlled polymerization of N ‐isopropylacrylamide (NIPAAM) was achieved by atom transfer radical polymerization (ATRP) using ethyl 2‐chloropropionate (ECP) as initiator and CuCl/tris(2‐dimethylaminoethyl)amine (Me 6 TREN) as a catalytic system. The polymerization was carried out in DMF:water 50:50 (v/v) mixed solvent at 20 °C. The first order kinetic plot was linear up to 92% conversion. Controlled molecular weights up to 2.2 × 10 4 and low polydispersities (1.19) were obtained. The living character of the polymerization was also demonstrated by self‐blocking experiments. Block copolymers with N , N ‐dimethylacrylamide (DMAAM) and 3‐sulfopropyl methacrylate (SPMA) were successfully prepared.Molecular weights and polydispersities of polyNIPAAM versus NIPAAM conversion for two different degrees of polymerization.