Preparation and processing: All composites of the respective resins were processed by compounding DDGS or Stover at 10% concentration (by weight) utilizing a twin-screw compounder (Leistritz Micro 27,
L7D ratio 30, Leistritz Corp.) to obtain an extrudate which was pelletized with a pelletizer (Scheer Bay Inc., Wisconsin, USA) to produce plastic pellets for injection molding.