Chapter-3. Rheological Behavior of Starch-Polycaprolactone (PCL) Nanocomposite Melts Synthesized by Reactive Extrusion
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چکیده
3.1 Abstract Rheological behavior of reactively extruded starch-PCL nanocomposite blends was evaluated in an off-line capillary rheometer. Power law models for blends with different nanoclay volume fractions were developed using appropriate correction factors. Consistency coefficients K for blends containing starch were significantly higher than 100% PCL. Starch-PCL nanocomposite blends showed shear-thinning behavior with higher pseudoplasticity than 100% PCL. Viscosities of nanocomposite blends were significantly lower than 100% PCL and non-reactive starch-PCL composites synthesized from simple extrusion mixing. Power law coefficients developed in this paper will be used to evaluate rheology-dependent parameters during scaling up the reactive extrusion process from a bench-top micro-extruder to a high output commercial scale extruder.
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