On the strain-induced structural evolution of Poly(ethylene-2,5-furanoate) upon uniaxial stretching: An in-situ SAXS-WAXS study

Strain-induced crystallization of poly(ethylene 2,5-furandicarboxylate). Mechanical and crystallographic analysis

“…Above this NDR, PEF exhibits an impressive strain hardening which can be the witness of a strong chains microstructural organization thanks to the stretching process. In previously reported results on PEF [29][30][31]37], hardening was not so important. This difference can be attributed to the differences in stretching conditions, especially the fact that our protocol allowed to keep strain rate constant up to strain hardening instead of decreasing it and, the use of true stress and strain.…”

“…To finish with, let us stress on the fact that our protocol allowed us to reinforce PEF up to a stress of 300 MPa whereas other authors only reached [29,30,37] a value of 10 MPa. This demonstrates the relevance of our stretching protocol and the ability of PEF to significant strain hardening.…”

“…Because of its relative novelty as well as its rarity, few studies deal with the mechanical behaviour and with SIC of PEF under uni-axial stretching [29][30][31] or under bi-axial stretching [32]. Considering the "state of the art", it appears that PEF should exhibit SIC as PET does, but a simple transposition of stretching conditions cannot be successful.…”

“…Upon stretching above its glass transition, and for appropriate temperature and strain rate conditions, PEF strain-induced crystallization has been proven [29][30][31][32]. Nevertheless, none of the previous studies allowed to unambiguously relate local mechanical loading to local microstructure, due to the use of engineering data.…”

Partially bio-based and tough polyesters, poly(ethylene 2,5-thiophenedicarboxylate-co-1,4-cyclohexanedimethylene 2,5-thiophenedicarboxylate)s

“…[1][2][3][4][5][6][7] Specially, sustainable materials with high-performance or biodegradability have become the research hot spot, such as poly(ethylene 2,5-furandicarboxylate) (PEF), [8][9][10][11][12][13][14] poly(1,-4-butylene 2,5-furandicarboxylate), 15,16 poly(lactic acid), [17][18][19] and poly(butylene 2,5-thiophenedicarboxylate) (PBTF). [1][2][3][4][5][6][7] Specially, sustainable materials with high-performance or biodegradability have become the research hot spot, such as poly(ethylene 2,5-furandicarboxylate) (PEF), [8][9][10][11][12][13][14] poly(1,-4-butylene 2,5-furandicarboxylate), 15,16 poly(lactic acid), [17][18][19] and poly(butylene 2,5-thiophenedicarboxylate) (PBTF).…”