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

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...

Full description

Saved in:
Bibliographic Details
Published in:Polymer (Guilford) 2022-04, Vol.247, p.124757, Article 124757
Main Authors: Bardin, Antoine, Le Gac, Pierre-Yves, Albouy, Pierre-Antoine, Bindi, Hervé, Fayolle, Bruno
Format: Article
Language:English
Subjects:
Chain scission
Chains
Chemical Sciences
Copolymers
Crystallization
Elongation
Engineering Sciences
Macromolecules
Materials
Molecular structure
PEBA
Poly(ether-block-amide)
Polymers
Solid phases
Strain
Strain-induced crystallization
Stress
Thermoplastic elastomer
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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. [Display omitted] •A range of PEBA presenting various macromolecular structures has been produced after hydrolysis.•Chain scission changes strain-induced crystallization (SIC) occurring during tensile loading.•A close correlation between stress and crystallinity induced under strain is highlighted.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2022.124757