Effect of initial imbibed moisture content on flexural fatigue behavior of polyamide 66/hectorite nanocomposites at laboratory condition

Impact of moisture and plasticizer properties on polymer–plasticizer physical mixing performance

“…Water may participate via purposefully targeted water addition or involuntary sources, such as background humidity, feed materials, and residual water from an upstream unit operation. Water has been shown to significantly impact the melt rheology and phase behavior of the system by providing a plasticization effect, as evident by changes in the moduli and thermal transitions . The presence of unwanted water has also been reported to cause processing issues, such as gassing and foaming, and the deterioration of polymer properties, such as a reduced mechanical strength and increased brittleness, particularly in the case of hygroscopic polymers .…”

“…Water has been shown to significantly impact the melt rheology and phase behavior of the system by providing a plasticization effect, as evident by changes in the moduli and thermal transitions . The presence of unwanted water has also been reported to cause processing issues, such as gassing and foaming, and the deterioration of polymer properties, such as a reduced mechanical strength and increased brittleness, particularly in the case of hygroscopic polymers . Thus, the role of water in influencing the polymer–plasticizer mixing performance via, for example, alteration of the interfacial interactions and wetting behavior between the polymer and plasticizer is of high interest.…”

Flexural fatigue behaviour of carbon nanofiber/epoxy nanocomposites

“…considered the influence of environment on the flexural fatigue behaviour of polyamide 66/hectorite nanocomposites. Also, they found that the effect of initial imbibed moisture content on flexural fatigue behaviour of polyamide 66/hectorite nanocomposites is conducted under deflection control mode using a custom built, table‐top flexural fatigue test rig at a laboratory condition …”

“…For nanocomposites under displacement-controlled condition, the fatigue life was investigated by various researchers. [6][7][8][9] Ramkumar and Gnanamoorthy 6 investigated the stiffness and flexural fatigue life improvements of polymer matrix reinforced nanocomposites with nanoclay. They described the effect of nanoclay fillers addition on the flexural fatigue response of polyamide-6.…”

“…Also, they found that the effect of initial imbibed moisture content on flexural fatigue behaviour of polyamide 66/hectorite nanocomposites is conducted under deflection control mode using a custom built, table-top flexural fatigue test rig at a laboratory condition. 9 A comprehensive survey in the available literature reveals that the addition of nanofillers can improve the fatigue behaviour of composites. However, there is a lack of research on the fatigue behaviour of epoxy resin filled with CNF under displacement control flexural bending fatigue loading.…”