PBT plasticity loss induced by oxidative and hydrolysis ageing

Camille Loyer (1) , Gilles Régnier (1) , V. Duval (2) , Y. Ould (2) , Emmanuel Richaud (1)

1 PIMM - Laboratoire Procédés et Ingénierie en Mécanique et Matériaux
2 Aptiv Solutions

This paper reports the study of embrittlement of PBT submitted either to thermal or hydrolytic ageing. All changes were followed up by tensile tests, rheometry in molten state and gel permeation chromatography for molar mass changes, SAXS and DSC experiments for crystallinity changes. Both kind of ageing were shown to induce predominant chain scissions with moderate crystallinity increase, in great part due to annealing. The combination of all results were used to establish a Mw - χc embrittlement window helping for a determination of an end of life criterion.

Mots clés: Polybutylene terephthalate; Embrittlement; Crystallinity; Molar mass; Hydrolysis; Thermal ageing

Domaines: Polymères

Camille Loyer, Gilles Régnier, V. Duval, Y. Ould, Emmanuel Richaud. PBT plasticity loss induced by oxidative and hydrolysis ageing. Polymer Degradation and Stability, 2020, 181, pp.109368. ⟨10.1016/j.polymdegradstab.2020.109368⟩. ⟨hal-02966722⟩