Correlation between crystallization and mechanical stress reveals by chain scission of segmented amide copolymer

Type Article
Date 2022-04
Language English
Author(s) Bardin Antoine1, 2, 3, Le Gac Pierre YvesORCID1, Albouy Pierre-Antoine4, Bindi Hervé2, Fayolle Bruno3
Affiliation(s) 1 : Marine Structure Laboratory, IFREMER, Centre de Bretagne, 29280, Plouzané, France
2 : Thales DMS France, 525 Route des Dolines, 06560, Valbonne, France
3 : PIMM Laboratory, Arts et Metiers Institute of Technology, CNRS, Cnam, HESAM Université, 151 Boulevard de l'Hôpital, 75013, Paris, France
4 : Laboratoire de Physique des Solides, UMR 8502, Université Paris-Sud, Université Paris-Saclay, 91405, Orsay, France
Source Polymer (0032-3861) (Elsevier BV), 2022-04 , Vol. 247 , P. 124757 (8p.)
DOI 10.1016/j.polymer.2022.124757
WOS© Times Cited 1
Keyword(s) Thermoplastic elastomer, Poly(ether-block-amide), PEBA, Chain scission, Strain-induced crystallization

By tuning hydrolysis duration of a segmented ether-amide copolymer (PEBA), a range of specimens presenting various macromolecular structures has been produced. Knowing that scissions occur predominantly at the bond between hard and soft blocks, for a given hard phase structure we study the impact of phase interconnection changes on strain-induced crystallization (SIC) occurring during tensile loading. The consequences of chain scissions on the structural reorganization involving SIC measured with in situ X-ray diffraction is considered here for the first time. A close correlation between stress and crystallinity induced under strain is highlighted whatever the chain scission number, i.e. the number of phase interconnections. As a result, the stress decrease observed at a given elongation can be interpreted as a consequence of a SIC weakening with the chain scission process.

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