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Preparation and characterization of polyaniline N ‐grafted with poly(ethyl acrylate) synthesized via atom transfer radical polymerization
Author(s) -
Massoumi Bakhshali,
Abdollahi Mahdi,
Shabestari Somayyeh Jahed,
Entezami Ali Akbar
Publication year - 2012
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.38117
Subject(s) - polyaniline , polymer chemistry , atom transfer radical polymerization , copolymer , materials science , grafting , ethyl acrylate , polymerization , thermogravimetric analysis , acrylate , fourier transform infrared spectroscopy , chemistry , polymer , chemical engineering , organic chemistry , composite material , engineering
Polyaniline (PANI) N ‐grafted with poly(ethyl acrylate) (PEA) was synthesized by the grafting of bromo‐terminated poly (ethyl acrylate) (PEA‐Br) onto the leucoemeraldine form of PANI. PEA‐Br was synthesized by the atom transfer radical polymerization of ethyl acrylate in the presence of methyl‐2‐bromopropionate and copper(I) chloride/bipyridine as the initiator and catalyst systems, respectively. The leucoemeraldine form of PANI was deprotonated by butyl lithium and then reacted with PEA‐Br to prepare PEA‐ g ‐PANI graft copolymers containing different amounts of PEA via an N ‐grafting reaction. The graft copolymers were characterized by Fourier transform infrared spectroscopy, elemental analysis, and thermogravimetric analysis. Solubility testing showed that the solubility of PANI in chloroform was increased by the grafting of PEA onto PANI. The morphology of the PEA‐ g ‐PANI graft copolymer films was observed by scanning electron microscopy to be homogeneous. The electrical conductivity of the graft copolymers was measured by the four‐probe method. The results show that the conductivity of the PANI decreased significantly with increasing grafting density of PEA onto the PANI backbone up to 7 wt % and then remained almost constant with further increases in the grafting percentage of PEA. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013