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- W4200155302 endingPage "124424" @default.
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- W4200155302 abstract "Copolymerizing poly(hexamethylene terephthalamide-co-isophthalamide) (PA6TI) with 40 wt% polyamide 66 (PA66) results in only minor decreases in modulus and yield stress owing to isomorphous substitution of PA6TI units by PA66 units in the PA6TI α phase, so that crystallinity is maintained in the resulting PA6TI-66 terpolymer. However, the ductility also significantly increases. This is attributed to a deformation-induced transformation of the PA6TI α phase to a disordered form of the PA66 α phase, where PA6TI units constitute defects and the chains adopt extended conformations. This phase is argued to be favored in initially amorphous PA66-rich regions and hence stabilizes interlamellar micro-necks that develop during yielding. By contrast, segregation of isophthaloyl units to the amorphous regions in PA6TI hinders strain-induced crystallization, leading to failure at significantly lower strains. Brittleness may therefore be a generic problem when comonomers are used to facilitate processing, but one that may be overcome through proper microstructural control." @default.
- W4200155302 created "2021-12-31" @default.
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- W4200155302 date "2022-01-01" @default.
- W4200155302 modified "2023-10-14" @default.
- W4200155302 title "Enhanced ductility in high performance polyamides due to strain-induced phase transitions" @default.
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- W4200155302 doi "https://doi.org/10.1016/j.polymer.2021.124424" @default.
- W4200155302 hasPublicationYear "2022" @default.
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