Journal
POLYMERS
Volume 9, Issue 11, Pages -Publisher
MDPI AG
DOI: 10.3390/polym9110623
Keywords
maleic anhydride grafted poly(lactic acid); styrene; wood flour; poly(lactic acid); bio-composites; interfacial adhesion
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Funding
- Fundamental Research Funds for the Central Universities [2572017CB15]
- Scientific Research Foundation of Heilongjiang for returned Scholars [LC2015011]
- China Postdoctoral Science Foundation [2014T70303]
- National Natural Science Foundation of China [31100425]
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This study aimed to evaluate the effect of styrene-assisted maleic anhydride-grafted poly(lactic acid) (PLA-g-St/MAH) on the interfacial properties of wood flour/poly(lactic acid) (PLA) bio-composites. PLA-g-St/MAH was synthesized by free-radical melt grafting using styrene as a comonomer and dicumyl peroxide as an initiator. The structure of PLA-g-St/MAH was characterized by Fourier transform infrared spectroscopy. Wood flour/PLA composites were prepared by compression molding using PLA-g-St/MAH as a compatibilizer. The effects of PLA-g-St/MAH on the rheological and mechanical properties, as well as on the fractured surface morphology of the composites were investigated. Results indicated that storage modulus, complex viscosity, equilibrium torque, and shear heat were significantly increased. The mechanical properties of the wood flour/PLA composites were also significantly increased after the addition of PLA-g-St/MAH. The maximum values were achieved at the loading rate of 3 wt % because of the improved interfacial adhesion between the wood flour and the PLA matrix.
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