Yi, Xiao Fei Mishra, Ananta Kumar Kim, Nam Hoon Ku, Bon-Cheol Lee, Joong Hee 2024-01-20T12:04:47Z 2024-01-20T12:04:47Z 2021-09-05 2013-06 1359-835X https://pubs.kist.re.kr/handle/201004/128010 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. (C) 2013 Elsevier Ltd. All rights reserved. English ELSEVIER SCI LTD FUNCTIONALIZED CARBON NANOTUBES RESIN NANOCOMPOSITES COPOLYMERS POLYESTER CLAY Synergistic effects of oxidized CNTs and reactive oligomer on the fracture toughness and mechanical properties of epoxy Article 10.1016/j.compositesa.2013.02.011 1 COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, v.49, pp.58 - 67 COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING 49 58 67 scie scopus 000319533600008 2-s2.0-84875205362 Engineering, Manufacturing Materials Science, Composites Engineering Materials Science Article FUNCTIONALIZED CARBON NANOTUBES RESIN NANOCOMPOSITES COPOLYMERS POLYESTER CLAY Thermosetting resin Nano-structures Fracture toughness Mechanical properties