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PBT plasticity loss induced by oxidative and hydrolysis ageing

Type
Articles dans des revues avec comité de lecture
Author
LOYER, C.
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
RÉGNIER, Gilles
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
DUVAL, V.
347563 Aptiv Solutions
OULD, Y.
347563 Aptiv Solutions
RICHAUD, Emmanuel
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/19359
DOI
10.1016/j.polymdegradstab.2020.109368
Date
2020
Journal
Polymer Degradation and Stability

Abstract

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.

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