Injection-Molded Bioblends from Lignin and Biodegradable Polymers: Processing and Performance Evaluation |
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Authors: | Ben Adams Mohamed Abdelwahab Manjusri Misra Amar K Mohanty |
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Institution: | 1.School of Engineering, Thornbrough Building,University of Guelph,Guelph,Canada;2.Bioproducts Discovery and Development Centre, Department of Plant Agriculture, Crop Science Building,University of Guelph,Guelph,Canada |
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Abstract: | This paper investigates the effects of the incorporation of lignin and small quantities of epoxidized natural rubber (ENR) as an impact modifying agent on blends of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and poly(ε-caprolactone) (PCL). The addition of lignin resulted in a slight improvement of flexural strength and modulus of the ternary blending system. Incorporation of ENR into the blend resulted in an increase in notched Izod impact strength from 40 to 135% depending on the concentration of ENR. The addition of lignin into the blend resulted in an improvement of thermal stability of the ternary blend system. Morphological analysis showed a good dispersion of PHBV phases and lignin within the PCL matrix. Rheological characterization revealed that the presence of lignin resulted in increased storage modulus of the bioblend. |
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