Extrusion method, blending composites

Recently, Liu et al. [34] prepared banana fibre (BaF)-filled composites based on high-density polyethylene (HDPE)/polyaminde-6 (PA 6) blends via a two-step extrusion method. Maleic anhydride grafted styrene/ethylene-butylene/styrene triblock polymer (SEBS-g-MA) and maleic anhydride grafted polyethylene (PE-g-MA) were used to enhance impact performance and interfacial bonding between BaF and the resins. Mechanical, crystaUization/melting, thermal stability, water absorption and... 

Special methods of incorporation slurry process in which polymer powder and fibers are suspended in water followed by dewatering and wet sheet formation similar to paper manufacture technology melt impregnation of fiber bundles in equipment containing fluidized bed zone and heating zone followed by extrusion through die filler encapsulation is faster than blend compatibilization therefore filler must be added to compatibilized blend " compatibilizers were used with glass beads to improve mechanical properties of composite ... 

Another method for achieving improved properties could be similar to that mentioned for molecular composites, namely, synthesizing block copolymers containing the LCP that would then be mixed with thermoplastics of the other block constituent. Reactive extrusion concepts would also appear to be applicable to improving the interfacial adhesion of LCP blends, and some studies have investigated ester-exchange reactions [Friedrich et al., 1988],... 

Another technique, known as the dry powder mixing method, has been employed by Cooper et al. to produce nanotube-reinforced polymethylmethacrylate (PMMA) composites [61]. Like most of the currently used fabrication methods for nanotube-based polymer composites, this technique is a combination of several protocols including solution-evaporation, sonication, kneading, and extrusion. More specifically, these workers used ultrasonic techniques to blend carbon nanotubes with PMMA particles, and the blend was later extruded to orient the nanotubes. Yang et al. [62] prepared small-scale batches of ABS nanocomposites without the use of solvents or ultrasonic techniques with good dispersion of the nanotubes. 

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