Structures and morphologies of cast and plastically strained polyamide 6 films as evidenced by confocal Raman microspectroscopy and atomic force microscopy |
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Authors: | Vincent Ferreiro Christophe Depecker Ghislaine Coulon |
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Affiliation: | a Laboratoire de Structure et Propriétés de l'Etat Solide (associé au CNRS), Université des Sciences et Technologies de Lille, Bat. C6, LSPES, 59655 Villeneuve d'Ascq Cedex, France b Laboratoire de Spectrochimie Infrarouge et Raman (associé au CNRS), Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France |
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Abstract: | Both confocal Raman microspectroscopy and atomic force microscopy (AFM) have been undertaken to study the crystalline and the morphological aspects of cast PA 6 films at a sub-microscopic scale. The percentages of the different crystalline structures present within PA 6 cast films, i.e. the monoclinic α, the pseudo-hexagonal β, and the monoclinic γ, have been measured by confocal Raman microspectroscopy. In cast films, the prevailing structure is the β one. AFM has been used to characterize the morphology of the PA 6 films. Simultaneously, the deformed state has been considered as well. Our main interest has been to follow the evolution of the percentage of each crystalline structure as a function of the plastic deformation mechanisms which are responsible of the yielding of PA 6 films: shear banding for temperatures T lower than 160 °C and formation of fibrils for |
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Keywords: | Raman microspectroscopy Semicrystalline polymers Atomic force microscopy |
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