Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites
Нема приказа
Аутори
Pandis, Ch.Logakis, E.
Kyritsis, A.
Pissis, P.
Vodnik, Vesna
Džunuzović, Enis S.
Nedeljković, Jovan
Đoković, Vladimir
Rodriguez Hernandez, J. C.
Gomez Ribelles, J. L.
Чланак у часопису
Метаподаци
Приказ свих података о документуАпстракт
Dynamic mechanical-thermal analysis (DMTA), differential scanning calorimetry (DSC), thermally stimulated depolarization currents (TSDC) and, mainly, broadband dielectric relaxation spectroscopy (DRS) were employed to investigate in detail glass transition and polymer dynamics in silver/poly(methyl methacrylate) (Ag/PMMA) nanocomposites. The nanocomposites were prepared by radical polymerization of MMA in the presence of surface modified Ag nanoparticles with a mean diameter of 5.6 nm dispersed in chloroform. The fraction of Ag nanoparticles in the final materials was varied between 0 and 0.5 wt%, the latter corresponding to 0.055 vol%. The results show that the nanoparticles have practically no effect on the time scale of the secondary beta and gamma relaxations, whereas the magnitude of both increases slightly but systematically with increasing filler content. The segmental alpha relaxation, associated with the glass transition, becomes systematically faster and stronger in the nanoc...omposites. The glass transition temperature T(g) decreases with increasing filler content of the nanocomposites up to about 10 degrees C. in good correlation by the four techniques employed. Finally, the elastic modulus decreases slightly but systematically in the nanocomposites, both in the glassy and in the rubbery state. The results are explained in terms of plasticization of the PMMA matrix, due to constraints imposed to packing of the chains by the Ag nanoparticles, and, at the same time, of the absence of strong polymer-filler interactions, due to the surface modification of the Ag nanoparticles by oleylamine at the stage of preparation. (C) 2011 Elsevier Ltd. All rights reserved.
Кључне речи:
Ag nanoparticles / Polymer dynamics / Glass transition / Segmental relaxation / Free volumeИзвор:
European Polymer Journal, 2011, 47, 8, 1514-1525Финансирање / пројекти:
- NAPOLYNET - Setting up research intensive clusters across the EU on characterization of polymer nanostructures (EU-FP7-218331)
- Spanish Ministry of Science and Innovation [EUI2008-00126], Conselleria de Sanidad (Generalitat Valenciana), Instituto de Salud Carlos III (Ministry of Science and Innovation)
DOI: 10.1016/j.eurpolymj.2011.06.001
ISSN: 0014-3057
WoS: 000293939800003
Scopus: 2-s2.0-79961173420
Колекције
Институција/група
VinčaTY - JOUR AU - Pandis, Ch. AU - Logakis, E. AU - Kyritsis, A. AU - Pissis, P. AU - Vodnik, Vesna AU - Džunuzović, Enis S. AU - Nedeljković, Jovan AU - Đoković, Vladimir AU - Rodriguez Hernandez, J. C. AU - Gomez Ribelles, J. L. PY - 2011 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4453 AB - Dynamic mechanical-thermal analysis (DMTA), differential scanning calorimetry (DSC), thermally stimulated depolarization currents (TSDC) and, mainly, broadband dielectric relaxation spectroscopy (DRS) were employed to investigate in detail glass transition and polymer dynamics in silver/poly(methyl methacrylate) (Ag/PMMA) nanocomposites. The nanocomposites were prepared by radical polymerization of MMA in the presence of surface modified Ag nanoparticles with a mean diameter of 5.6 nm dispersed in chloroform. The fraction of Ag nanoparticles in the final materials was varied between 0 and 0.5 wt%, the latter corresponding to 0.055 vol%. The results show that the nanoparticles have practically no effect on the time scale of the secondary beta and gamma relaxations, whereas the magnitude of both increases slightly but systematically with increasing filler content. The segmental alpha relaxation, associated with the glass transition, becomes systematically faster and stronger in the nanocomposites. The glass transition temperature T(g) decreases with increasing filler content of the nanocomposites up to about 10 degrees C. in good correlation by the four techniques employed. Finally, the elastic modulus decreases slightly but systematically in the nanocomposites, both in the glassy and in the rubbery state. The results are explained in terms of plasticization of the PMMA matrix, due to constraints imposed to packing of the chains by the Ag nanoparticles, and, at the same time, of the absence of strong polymer-filler interactions, due to the surface modification of the Ag nanoparticles by oleylamine at the stage of preparation. (C) 2011 Elsevier Ltd. All rights reserved. T2 - European Polymer Journal T1 - Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites VL - 47 IS - 8 SP - 1514 EP - 1525 DO - 10.1016/j.eurpolymj.2011.06.001 ER -
@article{ author = "Pandis, Ch. and Logakis, E. and Kyritsis, A. and Pissis, P. and Vodnik, Vesna and Džunuzović, Enis S. and Nedeljković, Jovan and Đoković, Vladimir and Rodriguez Hernandez, J. C. and Gomez Ribelles, J. L.", year = "2011", abstract = "Dynamic mechanical-thermal analysis (DMTA), differential scanning calorimetry (DSC), thermally stimulated depolarization currents (TSDC) and, mainly, broadband dielectric relaxation spectroscopy (DRS) were employed to investigate in detail glass transition and polymer dynamics in silver/poly(methyl methacrylate) (Ag/PMMA) nanocomposites. The nanocomposites were prepared by radical polymerization of MMA in the presence of surface modified Ag nanoparticles with a mean diameter of 5.6 nm dispersed in chloroform. The fraction of Ag nanoparticles in the final materials was varied between 0 and 0.5 wt%, the latter corresponding to 0.055 vol%. The results show that the nanoparticles have practically no effect on the time scale of the secondary beta and gamma relaxations, whereas the magnitude of both increases slightly but systematically with increasing filler content. The segmental alpha relaxation, associated with the glass transition, becomes systematically faster and stronger in the nanocomposites. The glass transition temperature T(g) decreases with increasing filler content of the nanocomposites up to about 10 degrees C. in good correlation by the four techniques employed. Finally, the elastic modulus decreases slightly but systematically in the nanocomposites, both in the glassy and in the rubbery state. The results are explained in terms of plasticization of the PMMA matrix, due to constraints imposed to packing of the chains by the Ag nanoparticles, and, at the same time, of the absence of strong polymer-filler interactions, due to the surface modification of the Ag nanoparticles by oleylamine at the stage of preparation. (C) 2011 Elsevier Ltd. All rights reserved.", journal = "European Polymer Journal", title = "Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites", volume = "47", number = "8", pages = "1514-1525", doi = "10.1016/j.eurpolymj.2011.06.001" }
Pandis, Ch., Logakis, E., Kyritsis, A., Pissis, P., Vodnik, V., Džunuzović, E. S., Nedeljković, J., Đoković, V., Rodriguez Hernandez, J. C.,& Gomez Ribelles, J. L.. (2011). Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites. in European Polymer Journal, 47(8), 1514-1525. https://doi.org/10.1016/j.eurpolymj.2011.06.001
Pandis C, Logakis E, Kyritsis A, Pissis P, Vodnik V, Džunuzović ES, Nedeljković J, Đoković V, Rodriguez Hernandez JC, Gomez Ribelles JL. Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites. in European Polymer Journal. 2011;47(8):1514-1525. doi:10.1016/j.eurpolymj.2011.06.001 .
Pandis, Ch., Logakis, E., Kyritsis, A., Pissis, P., Vodnik, Vesna, Džunuzović, Enis S., Nedeljković, Jovan, Đoković, Vladimir, Rodriguez Hernandez, J. C., Gomez Ribelles, J. L., "Glass transition and polymer dynamics in silver/poly(methyl methacrylate) nanocomposites" in European Polymer Journal, 47, no. 8 (2011):1514-1525, https://doi.org/10.1016/j.eurpolymj.2011.06.001 . .