Behavior of Polylactide Montmorillonite Nanocomposites

Polylactide (PLA) is one of the most essential biopolymeric material thanks to its renewability, biodegradability and biocompatibility. PLA has significant commercial use in food packaging industry and biomedical applications. However, it has not taken place yet in engineering applications when compared with traditional petroleum-based polymers because of its insufficient mechanical and thermal properties. The purpose of this study was to overcome these problems by using nanocomposite approach. In this manner, the influences of montmorillonite (MMT) type nanoclay addition and maleic anhydride (MA) grafted polylactide copolymer compatibilization were investigated on the thermal and mechanical behaviors of PLA. Nanocomposites have been compounded by melt mixing method via twin-screw extruder. After compounding, injection molding method has been used for shaping of bulk nanocomposite specimens. Intercalation and exfoliation level of the PLA/clay nanocomposites were examined by XRD method and TEM analysis. FTIR spectrums have been used for possible chemical interactions. Tensile tests, bending tests and fracture toughness tests have been used to investigate mechanical properties of PLA nanocomposites. Besides, changes in the transition temperatures and thermal degradation temperatures of PLA were observed in DSC and TGA thermal analyses. It was basically concluded that use of MMT nanocomposite approach could lead to significant improvements in many properties of PLA.


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Poly(lactic acid) (PLA) is a biodegradable and biocompatible polymer and it is accepted as a promising alternative to the petroleum based materials. The main objective of this study is to investigate the effect of the type and the amount of boron compounds with the addition of nanoclay to thermal, mechanical properties and flame retardancy of poly(lactic acid) (PLA) based nanocomposites. By this aim, zinc borate (ZnB), benzene-1,4-diboronic acid (BDBA) and Cloisite 30B (C30B) are used as an additive in PLA ...
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Sarı, Burcu; Kaynak, Cevdet; Department of Polymer Science and Technology (2015)
The aim of the first part of thesis was to investigate the effects of montmorillonite (MMT) type nanoclay content and maleic anhydride (MA) grafted polylactide (PLA) copolymer compatibilization on the properties of PLA nanocomposites. Nanocomposites have compounded by twin-screw extrusion melt-mixing followed with injection molding for shaping of bulk specimens. Successively intercalated and exfoliated structures of the nanocomposites were observed by XRD and TEM analysis, including the interactions with FT...
Citation Formats
B. Sarı and C. Kaynak, “Behavior of Polylactide Montmorillonite Nanocomposites,” 2016, Accessed: 00, 2020. [Online]. Available: