Tensile properties and impact strength of natural fiber filled PLA/PBSL composites

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Date
2019-07
Authors
Nur Atikah Aliah Binti Husney
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Biodegradable polymers reinforced with natural fiber composites are one of the most promising materials for packaging applications. The aim of this project is to compare the effect of coconut shell and rice husk at different loadings which are 2.5 wt%, 5 wt%, 7.5 wt%, and 10 wt% on the properties of PLA/PBSL blend composites. The coconut shell and rice husk filled PLA/PBSL composites were compounded by using two-roll mill followed by compression molding. Tensile strength, Young’s modulus, elongation at break and impact strength were used to characterize the composites. The stress-strain curves for both natural fibers were compared. In general, coconut shell filled PLA/PBSL composite shows the higher tensile properties compared to rice husk filled PLA/PBSL composite. Coconut shell filled PLA/PBSL composite at 7.5 wt% exhibit the best tensile properties with tensile strength of 16.79 MPa and tensile modulus of 13.75 MPa. As for impact test, coconut shell-filled PLA/PBSL composite also shows higher impact strength compared to that of rice husk. In conclusion, coconut shell filled PLA/PBSL composites has better tensile properties and impact strength as different filler content compared to rice husk filled PLA/PBSL composite.
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