We prepare well dispersed nanocomposites based on Graphite Nanoplatelets (GNPs) and polystyrene (PS) through a combination of solution and melt mixing techniques. The samples are subjected to morphological, electrical, and rheological investigations. Electron microscopy analyses show that GNPs are well dispersed, and the presence of few nanometers thick GNPs is noticed. The electrical conductivity of the polymer dramatically increases at a critical content of particles of Φ∼4 wt.%, indicating that electrical percolation has occurred. The existence of a percolating network induces a marked elastic connotation in the melt state. We show that the elasticity of GNP networks in samples at different composition can be scaled on a single master curve. This allows for the accurate estimation of the rheological percolation threshold. In addition, using the master curve we can infer the elasticity of GNP networks which are too tenuous to be appreciated via conventional rheological measurements.
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11 July 2012
6TH INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES
10–14 June 2012
Ischia, Italy
Research Article|
July 11 2012
Linear viscoelasticity of polymer-graphite nanoplatelets (GNPs) nanocomposites
Martina Salzano de Luna;
Martina Salzano de Luna
Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Piazzale V. Tecchio, 80, 80125 Napoli,
Italy
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Domenico Acierno;
Domenico Acierno
Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Piazzale V. Tecchio, 80, 80125 Napoli,
Italy
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Pietro Russo;
Pietro Russo
Istituto di Chimica e Tecnologia dei Polimeri, Consiglio Nazionale delle Ricerche, Via Campi Flegrei 34, Pozzuoli, 80078 Naples,
Italy
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Giovanni Filippone
Giovanni Filippone
Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Piazzale V. Tecchio, 80, 80125 Napoli,
Italy
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AIP Conf. Proc. 1459, 139–141 (2012)
Citation
Martina Salzano de Luna, Domenico Acierno, Pietro Russo, Giovanni Filippone; Linear viscoelasticity of polymer-graphite nanoplatelets (GNPs) nanocomposites. AIP Conf. Proc. 11 July 2012; 1459 (1): 139–141. https://doi.org/10.1063/1.4738423
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