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The Role of CNTs in Promoting Hybrid Filler Networking and Synergism with Carbon Black in the Mechanical Behavior of Filled Polyisoprene
Author(s) -
Galimberti Maurizio,
Coombs Michele,
Riccio Pierluigi,
Riccò Theonis,
Passera Simone,
Pandini Stefano,
Conzatti Lucia,
Ravasio Andrea,
Tritto Incoronata
Publication year - 2013
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201200075
Subject(s) - materials science , composite material , carbon nanotube , nanocomposite , filler (materials) , carbon black , ultimate tensile strength , modulus , deformation (meteorology) , isoprene , polymer , natural rubber , copolymer
The filler networking process promoted by multiwalled CNTs is studied in neat and CB‐filled poly(1,4‐ cis‐ isoprene) matrices. TEM analysis, tensile, dynamic‐mechanical, and electrical measurements reveal that the CNTs form a filler network at low concentration in neat PI and a continuous hybrid filler network at a lower CNT concentration in the presence of CB, with a remarkable increase of the nonlinear dynamic‐mechanical behavior of the nanocomposites at low deformation. A synergistic effect between CB and CNTs is demonstrated. The addition of CNTs to the CB‐filled PI matrix leads to initial modulus values much larger than those calculated by simple addition of the two initial moduli of the composites containing only CB and only CNTs, respectively.