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(a) Stress-strain curves of the PVDF matrix incorporated with 3 wt% SiO2, SiO2-vinyl, and F-SiO2 nanoparticles, respectively. (b) Stress-strain curves of the PVDF matrix incorporated with 3 wt%, 5 wt%, 20 wt%, and 35 wt% F-SiO2 nanoparticles, respectively. (c) The elongation at break of the F–SiO2/PVDF with the addition of a different content of pristine SiO2 and F–SiO2, respectively.
