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Preparation of polymer/graphite conducting nanocomposite by intercalation polymerization
Author(s) -
Chen GuoHua,
Wu DaJun,
Weng WenGui,
Yan WenLi
Publication year - 2001
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.2101
Subject(s) - graphite , materials science , intercalation (chemistry) , composite number , polymer , nanocomposite , polymerization , composite material , conductivity , electrical resistivity and conductivity , conductive polymer , in situ polymerization , polymer chemistry , organic chemistry , chemistry , electrical engineering , engineering
An in situ polymerization was conducted in the presence of expanded graphite obtained by rapid heating of the graphite intercalation compound (GIC) to form a polymer/expanded graphite conducting composite. Study showed that the graphite was dispersed in the form of nanosheets in the polymer matrix. The transition from an electrical insulator to an electrical semiconductor for the composite occurred when the expanded graphite content was 1.8 wt %, which was much lower than that of conventional conducting polymer composite. The composite exhibited high electrical conductivity of 10 −2 S/cm when the graphite content was 3.0 wt %. This great improvement of conductivity could be attributed to the high aspect ratio (width‐to‐thickness) of the graphite nanosheets. Study suggested that extensive rolling of the blend greatly affected the conductivity of the composite. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 2506–2513, 2001