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Evaluation of cotton byproducts as fillers for poly(lactic acid) and low density polyethylene
Authors:N SutivisedsakHN Cheng  MK DowdGW Selling  A Biswas
Institution:a National Center for Agricultural Utilization Research, USDA/Agricultural Research Services, 1815 N. University Street, Peoria, IL 61604, USA
b Southern Regional Research Center, USDA/Agricultural Research Service, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA
Abstract:Polymeric composites based on cotton burr and cottonseed bull have been prepared by melt blending and extrusion. For poly(lactic acid) (PLA) and low-density polyethylene (LDPE), addition of the fillers slightly changed the composite's thermal properties but significantly decreased the composite's mechanical properties. Heat treatment prior to extrusion resulted in composites with better tensile strength and Young's modulus. The use of maleic anhydride and peroxide only slightly improved the physical properties of the LDPE materials, but the effect was less clear for the PLA materials. The PLA-filler composites may be useful for lowering the cost of the materials in applications that can tolerate the decreased properties. In addition, the addition of fillers to LDPE might be beneficial in applications to improve stiffness or to improve biodegradability.
Keywords:Cottonseed hull  Cotton burr  Poly(lactic acid)  Low-density polyethylene  Composites  Filler  Biodegradability
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