Lower Temperature Plasticizing and Extrusion of Polymer in Spherical Screw Extruder under Vibration Force Field
(40-47) International Polymer Processing #1 (2011)
Zeng et al of Hunan University of Technology and South China University of Technology, China, developed physical and mathematical models for polymer plasticizing in proposed electromagnetic dynamic spherical screw extruder to explore polymer plasticizing and molding mechanism at lower temperature under vibration force field.  Polymer plasticizing mechanism was studied by deriving the mathematical expressions of energy consumed and the polymer flow. The energy consumed in polymer plasticizing was depicted in terms of vibrating dissipation, polymer deformation, shear and friction energy. LDPE was used as an objective material and extruded by the extruder with the electromagnetic excitation and spherical screw. The experimental results show the good agreement with theoretical calculations. Both of them show that: Polymer processing temperature and energy consumption decrease significantly while the plasticizing rate is increased over 60% by introducing the vibration force field. (RDC 3/16/2011).