Fracture toughness and toughening mechanisms of unsaturated polyester-based clay nanocomposites
In this study,the role of nanoclay particles (MMT) on the micro- and nano-scale deformation and fracture behaviour of a crosslink unsaturated polyester (UPE)-based nanocomposites is presented.Nanocomposites from well-dispersed MMT and UPE are prepared by a combination of mechanical stirrer and ultrasonication process.Fracture toughness represented by critical stress intensity factor (KIc) based on linear elastic fracture mechanics (LEFM) and compact tension (CT) configuration is evaluated.Morphological characteristics for all nanocomposites are examined by using TEM,and the fracture surface and the toughening mechanisms of materials are identified by SEM analysis.The morphological characterization showed an intercalation/ partially exfoliation structure of UPE/MMT nanocomposite with a moderate enhancement in fracture toughness in nanocomposite.The UPE/ 3 wt.% clay nanocomposite had the highest KIc by a 61 % improvement over the neat UPE.The incorporation of clay nanofiller into the crosslink UPE demonstrated a shift in toughening mechanism from a highly brittle fracture for the UPE into shear bands and particles debonding and decohesion for nanocomposites.
fracture toughness toughening mechanisms unsaturated polyester clay nanocomposites
Mushtaq T. Albdiry Belal F. Yousif Harry Ku
Centre of Excellence in Engineered Fibre Composites(CEEFC),Faculty of Engineering and Surveying,University of Southern Queensland,Toowoomba 4350,QLD,Australia
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）