Embrittlement Mechanisms of nylon66/Organoclay Nanocomposites Prepared by Melt-Compounding Process
Nylon 66 nanocomposites with different smectite clay loadings were prepared by conventional melt compounding process. The fracture toughness decreases with increasing clay content, which is a direct result of reduced plastic zone size at the crack tip region. The fracture mechanisms were studied using double-notched four-point-bending (DN-4PB) technique. A constraining effect from nanoclay fillers on plastic deformation of matrix is revealed by transmission electron microscopy (TEM). Micron-sized and submicron voids could be observed around the clay platelets. The voids coalesce and form premature cracks that promote crack propagation, thus reducing toughness.
Materials and Manufacturing Processes
Chen, Ling; Phang, In Yee; Wong, Shing Chung Josh; Lv, Peng-Fei; and Liu, Tianxi, "Embrittlement Mechanisms of nylon66/Organoclay Nanocomposites Prepared by Melt-Compounding Process" (2007). Mechanical Engineering Faculty Research. 396.