Synergistic effects of oxidized CNTs and reactive oligomer on the fracture toughness and mechanical properties of epoxy
- Synergistic effects of oxidized CNTs and reactive oligomer on the fracture toughness and mechanical properties of epoxy
- Xiao Fei Yi; Ananta Kumar Mishra; 김남훈; 구본철; 이중희
- Thermosetting resin; Nano-structures; Fracture toughness; Mechanical properties
- Issue Date
- Composites. Part A, Applied science and manufacturing
- VOL 49, 58-67
- The soft modifiers added to improve the fracture toughness of epoxies generally deteriorate their
mechanical properties. Hence, oxidized multi-walled carbon nanotubes (O-CNTs) were added to the
epoxy modified with reactive oligomer. The -NCO terminated reactive oligomer acts as a cross-linker
between the O-CNTs and the -OH groups of the epoxies. The impact strengths of the 15 wt.% oligomer
modified epoxy containing 0.5 wt.% of O-CNTs at room temperature (RT) and cryogenic temperature
(CT) are enhanced by 23.6% and 69.5% compared to that of the unmodified epoxy. In addition to increasing
fracture toughness, the tensile strength (TS) of the modified epoxy/O-CNTs at CT is found to be
91.7 MPa, which is comparable to that of the unmodified epoxy (92.1 MPa). Hence, the attachment of
O-CNTs to the reactive oligomer modified epoxy can be an efficient approach to toughen epoxy resins
without compromising their tensile properties.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.