In recent years, nanocomposites have attracted great interest, both
in industry and in academia. One of the major problems associated
with nanocomposites is their extremely high viscosity obtained. So,
(1) the power requirement for extrusion is higher, (2) higher
processing rates become infeasible, and (3) higher shearing heating
cause degradation of polymer. Thermotropic liquid crystalline
polymers (TLCPs) successfully act as processing aids that enable
thermoplastics, which normally extrude at temperatures high enough
to cause degradation, to be processed at lower and less damaging
temperatures. Processing windows are expanded and extrusion
pressure is decreased, resulting in reductions in energy input and
associated costs. This work includes three aspects: (1) understand
the interactions between TLCP and organoclay, (2) characterize the
viscosity reduction in polyethylene (PE)/TLCP/organoclay
nanocomposites, and (3) elucidate the proposed mechanisms for the
viscosity changes. This work should be useful to professionals in
nanocomposite processing and polymer melt rheology, especially for
processing nanocomposites using TLCPs as viscosity reduction
agents.
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