In-situ transmission electron microscopy studies of polymer-carbon nanotube composite deformation

Citation
D. Qian et Ec. Dickey, In-situ transmission electron microscopy studies of polymer-carbon nanotube composite deformation, J MICROSC O, 204, 2001, pp. 39-45
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Multidisciplinary
Journal title
JOURNAL OF MICROSCOPY-OXFORD
ISSN journal
0022-2720 → ACNP
Volume
204
Year of publication
2001
Part
1
Pages
39 - 45
Database
ISI
SICI code
0022-2720(200110)204:<39:ITEMSO>2.0.ZU;2-9
Abstract
This paper demonstrates the viability of in-situ transmission electron micr oscopy for studying the deformation mechanisms of polymer nano-composites. In-situ straining studies are performed on carbon multiwalled nanotube (MWN T)-polystyrene composite films. The experiments show that load transfer acr oss the nanotube-polystyrene interface is operative well into the plastic d eformation regime of the composite film. The MWNTs are observed to bridge c racks propagating through the polystyrene, providing closure stresses acros s the crack wake. Although some MWNTs fracture by either a sword-in-sheath mechanism or transverse shear fracture, most of the MWNTs eventually debond at the MWNT-polymer interface and subsequently pull out of the matrix.