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