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Evaluation of Poly(lactic acid) and Sugar Beet Pulp Green Composites |
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| Authors: | Victoria L. Finkenstadt LinShu Liu J. L. Willett | ||
| Affiliation: | (1) Plant Polymer Research, National Center for Agricultural Utilization Research, ARS, USDA, 1815 North University Street, Peoria, IL 61604, USA;(2) Crop Conversion Science and Engineering, Eastern Regional Research Center, ARS, USDA, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA | ||
| Abstract: | Poly(lactic acid) (PLA) and sugar beet pulp (SBP) were compounded by twin-screw extrusion and injection molded into composite forms. Specific mechanical energy decreased with the addition of SBP during processing. PLA–SBP composites retained more tensile strength than expected based on the Nicolais–Narkis model especially at high levels of SBP suggesting adhesion between SBP and PLA. The thermal characteristics of PLA were not affected by thermo-mechanical processing or by the incorporation of SBP up to 30% weight basis. PLA and PLA–SBP composites had similar tensile properties to other thermoplastic resins and may be used as a cost-competitive replacement.
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| Keywords: | Polymer– matrix composites Polymers Particle-filled polymers Extrusion Injection molding Poly(lactic acid) PLA | ||
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