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Deformation mechanisms in PBT at elevated temperatures


The plastic deformation of Polybutylene terephthalate (PBT) is investigated at three temperatures (120°C, 150°C, 180°C) representative of the span between glass transition, Tg ≈ 55°C and melting Tm ≈ 225°C temperatures. The mechanisms of tensile deformation are analyzed as a function of the true strain using a combination of temperature-controlled tensile experiments coupled with 2D digital image correlation and synchrotron sourced wide angle (WAXS) and small angle (SAXS) X-ray scattering the amorphous and crystalline regions causing the transition between polymorphs, respectively from the isotropic amorphous phase to a smectic phase and from the  crystalline phase to the  phase.
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hal-03982510 , version 1 (10-02-2023)



Laurent Farge, Francois Tournilhac, Javier Perez, Sandrine Hoppe, Isabelle Bihannic, et al.. Deformation mechanisms in PBT at elevated temperatures. 2023. ⟨hal-03982510⟩
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