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TitleProcessing and charcterization of a novel nonporous Poly(vinylidene fluoride) films in the beta-phase
Author(s)Sencadas, Vítor João Gomes Silva
Gregório Júnior, R.
Lanceros-Méndez, S.
Electroactive polymers
films and coatings
scanning electron microscopy
FTIR measurements
polymers and organics
Issue date2006
JournalJournal of Non-Crystalline Solids
Citation"Journal of Non-Crystalline Solids". ISSN 0022-3093. 352 (2006)
Abstract(s)Poly(vinylidene fluoride) (PVDF) has remarkable properties leading to electro-optics, electro-mechanical and biomedical applications. In particular its piezo- and pyroelectric properties provide possibilities for many technological applications. The semicrystalline nature of PVDF, combined with the occurrence of at least four crystalline phases implies a complicated physical microstructure. The most frequently described and important phase is the β. The piezo and pyro-electric properties mainly depend on this phase, so increasing the β phase content has always been a great concern. It is possible to obtain films in the β phase by solution but this material presents a high porosity leading to an opaque appearance and a decrease of the mechanical an electrical properties. In this work, porous films in the β phase were obtained directly from the solution at 600C. After applying pressure perpendicular to the surface of the film at elevated temperature, the pores in the original sample are eliminated. The changes on the morphology and crystallinity associated to the pressure applied to the samples were also studied.
Publisher version journaldescription.cws_home/505709/ description#description
AccessOpen access
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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