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Preparation and conductive properties of polycaprolactone‐grafted carbon black nanocomposites
Author(s) -
Cheng Jianguo,
Wang Li,
Huo Jia,
Yu Haojie,
Yang Qiang,
Deng Libo
Publication year - 2009
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.30569
Subject(s) - polycaprolactone , differential scanning calorimetry , nanocomposite , materials science , thermogravimetric analysis , carbon black , polymer chemistry , chemical engineering , caprolactone , scanning electron microscope , temperature coefficient , composite material , polymer , polymerization , natural rubber , physics , engineering , thermodynamics
Polycaprolactone‐grafted carbon black (CB ‐g‐ PCL) nanocomposites were prepared by surface‐initiated ring‐opening polymerization of ε‐caprolactone on the surface of CB. Thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), atomic force microscope (AFM), X‐ray diffraction (XRD), and polarizing optical microscope (POM) method were employed to characterize the resultant CB ‐g‐ PCL. The effect of temperature on resistivity of polycaprolactone‐grafted CB (CB ‐g‐ PCL) nanocomposites was investigated and compared with that of mixture of CB and PCL. It was found that CB ‐g‐ PCL nanocomposites exhibited positive temperature coefficient (PTC) phenomena between 48 and 51°C, and negative temperature coefficient (NTC) phenomena and between 51 and 54°C. The prepared CB ‐g‐ PCL nanocomposites have the potential to be temperature‐dependent switch materials. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009