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 α crystalline phase to the β phase.
@article{arxiv.2303.03121,
title = {Deformation mechanisms in PBT at elevated temperatures},
author = {Laurent Farge and François Tournilhac and Javier Perez and Sandrine Hoppe and Isabelle Bihannic and Jérémy Bianchin and Julien Boisse and Stéphane André},
journal= {arXiv preprint arXiv:2303.03121},
year = {2023}
}