A comparative study of fracture behavior between carbon black/poly(ethylene terephthalate) and multiwalled carbon nanotube/poly(ethylene terephthalate) composite films (original) (raw)

Abstract

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Fracture behavior of amorphous poly(ethylene terephthalate) (PET) films with multiwalled carbon nanotube (MWCNT) and carbon black (CB) is analyzed. The study evaluates fracture toughness through essential work of fracture tests and examines craze evolution via time-resolved small-angle X-ray scattering during tensile deformation. Results show that both fillers enhance PET fracture toughness by improving plastic work, with distinct mechanisms: CB facilitates craze initiation through stress concentration, while MWCNTs suppress craze growth due to their bridging effect.

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