Fracture toughness and toughening mechanisms of unsaturated polyester-based clay nanocomposites

Albdiry, Mushtaq T. and Yousif, Belal F. and Ku, Harry (2013) Fracture toughness and toughening mechanisms of unsaturated polyester-based clay nanocomposites. In: 13th International Conference on Fracture (ICF 2013) , 16-21 Jun 2013, Beijing, China.

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In this study, the role of nanoclay particles (MMT) on micro- and nano-scale deformation and fracture behaviour of a crosslinked unsaturated polyester (UPE)-based nanocomposites is explored. Nanocomposites from well-dispersed MMT particles and the UPE resin were prepared by a combination of mechanical mixing and ultrasonication process. The morphological characteristics of nanocomposites were examined by TEM. Critical stress intensity factor (KIc) based on linear elastic fracture mechanics (LEFM) and compact tension (CT) configuration is evaluated. The fracture modes and toughening mechanisms of the fractured-surfaces were identified by SEM analysis. An intercalation/partially exfoliation structure of UPE/MMT nanocomposite with moderate enhancement in fracture toughness is observed. The addition of 3 wt.% MMT exhibits the highest KIc value of nanocomposite by a 61% improvement over the neat UPE. The fracture surface of the neat UPE seems to be a highly brittle fracture without crazing and a coarser surface with the appearance of plastic deformation zones of the nanocomposites.

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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2013 by International Conference on Fracture. Permanent restricted access to published version due to publisher copyright policy.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - No Department
Date Deposited: 06 May 2014 00:00
Last Modified: 11 Jan 2017 02:46
Uncontrolled Keywords: fracture toughness; toughening mechanisms; unsaturated polyester; clay nanocomposites
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
09 Engineering > 0913 Mechanical Engineering > 091308 Solid Mechanics
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870304 Stone, Ceramics and Clay Materials

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