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(a) Representative tensile stress (MPa)—strain (%) curve of polyethylene terephthalate glycol (PETG) at a 50 mm/min elongation speed, (b) average tensile strength and yield strength (with the corresponding standard deviation) for PETG in all five elongation speeds, (c) tensile modulus (with the corresponding standard deviation) of PETG under the five different elongation speeds, and (d) strain rate sensitivity index “m”—strain (%) graph for PETG.
