Tensile Deformation of Bulk Polyamide 6 in the Preyield Strain Range. Micro–Macro Strain Relationships via in Situ SAXS and WAXS

Autor: Paul Sotta, Coraline Millot, Cyrille Rochas, Louise-Anne Fillot, Olivier Lame, Roland Séguéla
Přispěvatelé: Matrice extracellulaire et dynamique cellulaire - UMR 7369 (MEDyC), Université de Reims Champagne-Ardenne (URCA)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS), inconnu, Inconnu, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), Centre de Recherches sur les Macromolécules Végétales (CERMAV ), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire Polymères et Matériaux Avancés (LPMA), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), SFR CAP Santé (Champagne-Ardenne Picardie Santé), Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)
Rok vydání: 2017
Předmět:
Local elastic properties
Materials science
Polymers and Plastics
X ray scattering
Tensile deformation
Young's modulus
02 engineering and technology
010402 general chemistry
01 natural sciences
Strain
[SPI.MAT]Engineering Sciences [physics]/Materials
law.invention
Inorganic Chemistry
Crystal
Amorphous materials
Condensed Matter::Materials Science
symbols.namesake
law
Ultimate tensile strength
Materials Chemistry
Composite material
Crystallization
Small-angle X-ray scattering
Strong confinement
Microscopic deformations
Organic Chemistry
Crystalline materials
021001 nanoscience & nanotechnology
Deformation
0104 chemical sciences
Amorphous solid
Crystalline lamella
Elastic strain range
Orders of magnitude
Crystallography
Azimuthal distributions
Structural design
symbols
Glass
Deformation (engineering)
0210 nano-technology
Glass transition
Zdroj: Macromolecules
Macromolecules, American Chemical Society, 2017, 50 (4), pp.1541-1553. ⟨10.1021/acs.macromol.6b02471⟩
ISSN: 1520-5835
0024-9297
Popis: cited By 4; International audience; The macroscopic tensile deformation behavior of bulk PA6 was investigated in the elastic strain range. Samples having predominant α and β crystal structures were prepared thanks to appropriate crystallization procedures. Both materials were studied above and below the glass transition temperature of the amorphous phase. In parallel, the microscopic deformation behavior of these samples was followed up by combined in situ wide-angle and small-angle X-ray scattering. The change of SAXS long period over the whole azimuthal distribution was used to assess the local deformation at the scale of the lamella stacks in all directions. The WAXS patterns were used to assess the local crystal strains. Local stresses were further computed thanks to the elastic constant borrowed from the literature. The whole set of data allowed to establish micro-macro strain correlations and to determine the local elastic properties in the crystalline and amorphous phases. The effective tensile modulus of the amorphous phase of PA6 within lamella stacks at 120 °C is found to be several orders of magnitude higher than that of bulk amorphous PA6 in the rubbery state, i.e., close to that of the glassy state. This gives evidence of a strong confinement or strong Poisson’s effect of the amorphous layers due to the form factor to the stiff crystalline lamellae. © 2017 American Chemical Society.
Databáze: OpenAIRE
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