Abstract
Nutshells are agricultural waste products that can be procured at relatively low cost. In this work we examined the possibility of using these biodegradable materials as fillers in poly(lactic acid) and low density polyethylene. The nutshells were ground into powder, blended with the polymer, and then injection molded with final weight varying from 10 to 40 weight %. The mechanical and thermal properties of the composites were then studied. In general, the addition of fillers caused reductions in mechanical properties to varying extents, but thermal properties were only slightly affected. The use of maleic anhydride and peroxide with the fillers had a negative effect on poly(lactic acid) but a slightly positive effect on the stiffness of polyethylene. The results suggested that polymer-nutshell composites may be usable in applications where cost is a concern and where some reductions in mechanical properties are acceptable.
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Acknowledgment
The authors would like to thank Kathy Hornback for the excellent assistance with extrusion, Brian Jasberg and Gary Grose for extrusion and DSC trouble-shooting.
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Mention of trade names or commercial products in this publication is solely for the propose of providing specific information and does not imply recommendation of endorsement by the U.S. Department of Agriculture. USDA is an equal opportunity provider and employer.
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Sutivisedsak, N., Cheng, H.N., Burks, C.S. et al. Use of Nutshells as Fillers in Polymer Composites. J Polym Environ 20, 305–314 (2012). https://doi.org/10.1007/s10924-012-0420-y
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DOI: https://doi.org/10.1007/s10924-012-0420-y