Embrittlement mechanisms of nylon 66/organoclay nanocomposites prepared by melt-compounding process

作者：Chen L; Phang IY; Wong SC; Lv PF; Liu TX^*

来源：Materials and Manufacturing Processes, 2006, 21(2): 153-158.

DOI：10.1081/AMP-200068655

• clay
• fracture
• nanocomposites
• nylon 66

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.

• 出版日期2006
• 单位河南城建学院; 复旦大学