Ultrathin polymer films: Interfacial and annealing dependence of confinement effects

Daniele Prevosto, Kim Hung Nguyen, Massimiliano Labardi, Simone Capaccioli, Mauro Lucchesi, Pierangelo Rolla

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Ultrathin film of poly (vinyl acetate) supported on different metallic substrates have been investigated to study confinement effects on relaxation dynamics. The characteristic frequency of structural relaxation increases on decreasing thickness when the interfacial energy is less than roughly 3 mJ/m2, whereas it is thickness independent at about 3.5 mJ/m 2. The growth of an interfacial polymer layer, insoluble in the commonly used solvent, has been found to grow during annealing for several days at a temperature much above the glass transition. The presence of such layer reduces the average confinement effect on the film. Such finding seems to reconcile several contradicting results previously reported.

    Original languageEnglish
    Title of host publication6th International Conference on Times of Polymers (TOP) and Composites
    Pages58-60
    Number of pages3
    Edition1
    DOIs
    Publication statusPublished - 2012 Dec 1
    Event6th International Conference on Times of Polymers (TOP) and Composites - Ischia, Italy
    Duration: 2012 Jun 102012 Jun 14

    Publication series

    NameAIP Conference Proceedings
    Number1
    Volume1459
    ISSN (Print)0094-243X
    ISSN (Electronic)1551-7616

    Other

    Other6th International Conference on Times of Polymers (TOP) and Composites
    CountryItaly
    CityIschia
    Period12/6/1012/6/14

    Keywords

    • adsorbed layer
    • interfacial properties
    • relaxation dynamics
    • ultrathin film

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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