Effect of Confinement on Structural Relaxation in Ultrathin Polymer Films Investigated by Local Dielectric Spectroscopy

Autor: Hung K. Nguyen, Massimiliano Labardi, Simone Capaccioli, Pierangelo Rolla, Mauro Lucchesi, Daniele Prevosto

Publikováno v: Macromolecules
44 (2011): 6588–6593. doi:10.1021/ma200440z
info:cnr-pdr/source/autori:Nguyen, Hung K.; Prevosto, Daniele; Labardi, Massimiliano; Capaccioli, Simone; Lucchesi, Mauro; Rolla, Pierangelo/titolo:Effect of Confinement on Structural Relaxation in Ultrathin Polymer Films Investigated by Local Dielectric Spectroscopy/doi:10.1021%2Fma200440z/rivista:Macromolecules (Print)/anno:2011/pagina_da:6588/pagina_a:6593/intervallo_pagine:6588–6593/volume:44
44 (2011): 6588.
info:cnr-pdr/source/autori:Nguyen, H.; Prevosto, D.; Labardi, M.; Capaccioli, S.; Lucchesi, M.; Rolla, P./titolo:Effect of Confinement on Structural Relaxation in Ultrathin Polymer Films Investigated by Local Dielectric Spectroscopy/doi:/rivista:Macromolecules (Print)/anno:2011/pagina_da:6588/pagina_a:/intervallo_pagine:6588/volume:44

The effect of confinement on structural relaxation in ultrathin poly(vinyl acetate) films has been studied by local dielectric spectroscopy. This scanning probe method allows the investigation of dielectric relaxation at nanometer scale of supported

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00228458a3c9c6f138ec5214a2685a34
https://doi.org/10.1021/ma200440z

Effect of temperature and pressure on the structural (α-) and the true Johari–Goldstein (β-) relaxation in binary mixtures

Autor: Khadra Kessairi, Soheil Sharifi, Daniele Prevosto, Simone Capaccioli, Pierangelo Rolla

Publikováno v: Journal of non-crystalline solids 353 (2007): 4273–4277.
info:cnr-pdr/source/autori:Kessairi, K; Capaccioli, S; Prevosto, D; Sharifi, S; Rolla, P/titolo:Effect of temperature and pressure on the structural (alpha-) and the true Johari-Goldstein (beta-) relaxation in binary mixtures/doi:/rivista:Journal of non-crystalline solids/anno:2007/pagina_da:4273/pagina_a:4277/intervallo_pagine:4273–4277/volume:353

We investigated the microscopic origin of the excess wing through isothermal and isobaric dielectric relaxation measurements for the Quinaldine/tristyrene mixture. Our results show that the excess wing, characteristic of the high frequency side of th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::faa8822a0498d51a349dcbe8432f068b
https://doi.org/10.1016/j.jnoncrysol.2007.01.095

Polarization fluctuations near the glass transition

Autor: Pierangelo Rolla, Daniele Prevosto, Simone Capaccioli, A. Dominjon, Mauro Lucchesi

Publikováno v: Journal of non-crystalline solids 352 (2006): 4920–4927.
info:cnr-pdr/source/autori:Lucchesi, M; Dominjon, A; Capaccioli, S; Prevosto, D; Rolla, PA/titolo:Polarization fluctuations near the glass transition/doi:/rivista:Journal of non-crystalline solids/anno:2006/pagina_da:4920/pagina_a:4927/intervallo_pagine:4920–4927/volume:352

Measurements of polarization fluctuations were performed for an epoxy glass former. The voltage noise produced by polarization fluctuations of the sample filling a capacitor was acquired via a home-made very high input impedance current-voltage conve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6566ebdb838df4bbef3dccabb347a202
https://doi.org/10.1016/j.jnoncrysol.2006.02.153

Equilibrated polyethylene single-molecule crystals: molecular-dynamics simulations and analytic model of the global minimum of the free-energy landscape

Autor: A. Barbieri, Pierangelo Rolla, Luca Larini, Dino Leporini, D. Prevosto

Publikováno v: Journal of Physics: Condensed Matter. 17:L199-L208

The crystalline state of a single polyethylene chain with N = 500 monomers is investigated by extensive MD simulations. The polymer is folded in a well defined lamella with ten stems of approximately equal length, arranged into a regular, hexagonal p

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3109cc872e08d248aaef147290f91a41
https://doi.org/10.1088/0953-8984/17/19/l04

Effect of the isobaric and isothermal reductions in excess and configurational entropies on glass-forming dynamics

Autor: Riccardo Casalini, Mauro Lucchesi, Simone Capaccioli, Pierangelo Rolla, Daniele Prevosto

Publikováno v: Philosophical Magazine. 84:1513-1519

Dielectric relaxation times τ, over a broad range of temperatures and pressures for simple molecular glass-forming systems reveal good agreement with the pressure-extended Adam–Gibbs equation derived from the Adam–Gibbs model, relating directly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d464805dc0684515e499881ac74e4f34
https://doi.org/10.1080/14786430310001644288