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Polyaniline nanofibers for In situ MAO‐catalyzed polymerization of ethylene
Author(s) -
de Souza Basso Nara Regina,
Oliveira Felipo,
Graebin Ana Paula,
Moura Cássio Stein,
de Carvalho Fim Fabiana,
Galland Griselda Barrera,
Bonnaud Leila,
Murariu Oltea,
Dubois Philippe
Publication year - 2014
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.41197
Subject(s) - materials science , polyaniline , nanofiber , in situ polymerization , polyaniline nanofibers , nanocomposite , polymerization , thermal stability , chemical engineering , polymer chemistry , scanning electron microscope , conductive polymer , composite material , polymer , engineering
In this work electro‐conductive polyaniline nanofibers (PAni‐nanofibers) were prepared via interfacial methodology. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observations revealed that the synthesized PAni‐nanofibers present high aspect ratio with an average diameter of 80 nm, while they exhibit high conductivity (DC conductivity values: 4.19 ± 0.21 S cm −1 ). After specific treatment to remove moisture and remaining trapped HCl from PAni‐nanofibers, it was possible to prepare promising polyethylene (PE)/PAni composites by in situ polymerization of ethylene using bis(cyclopentadienyl) zirconium(IV) dichloride (Cp 2 ZrCl 2 ) and methylaluminoxane (MAO) as catalytic system. More precisely, various contents of PAni‐nanofibers (from 0.2 to 7 wt %) were successfully incorporated in the in situ produced PE/PAni nanocomposites. PAni‐nanofibers were found to affect significantly the crystallization of the polyolefinic matrix while preserving its thermal stability. Preliminary measurements of electric properties showed PAni‐nanofibres are able to bring electro‐conductive properties to the in situ polymerized PE/PAni composites. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 41197.