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Behavior of polylactide/microcrystalline cellulose biocomposites: effects of filler content and interfacial compatibilization

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Abstract

The purpose of this study was to investigate the effects of microcrystalline cellulose (MCC) content on the properties of polylactide (PLA) biocomposites; including the influences of maleic anhydride (MA) grafted PLA copolymer compatibilization. PLA/MCC biocomposites were produced by industrially compatible production techniques, i.e. twin-screw extrusion melt-mixing for compounding and injection molding for shaping of bulk specimens. SEM analysis and mechanical tests indicated that use of 3 wt% MCC resulted in very uniform distribution and consequently improved properties especially in terms of ductility and toughness. For instance, compared to neat PLA, the increases in the values of % strain at break and fracture toughness were 78 and 31 %, respectively. After MA compatibilization, these increases became as much as 82 and 55 %, respectively. Moreover, DSC and TGA indicated that use of MCC resulted in no significant changes in the transition temperatures and thermal degradation temperatures of PLA.

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Acknowledgments

Authors gratefully acknowledge financial support from METU Scientific Research Fund grant for the Project BAP-03-08-2015-002.

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  1. Materials and Metallurgical Engineering Department, Middle East Technical University, Ankara, Turkey

    Berk Dogu & Cevdet Kaynak

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  1. Berk Dogu
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  2. Cevdet Kaynak
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Correspondence to Cevdet Kaynak.

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Dogu, B., Kaynak, C. Behavior of polylactide/microcrystalline cellulose biocomposites: effects of filler content and interfacial compatibilization. Cellulose 23, 611–622 (2016). https://doi.org/10.1007/s10570-015-0839-0

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