Influence of the processing methods on the properties of poly(lactic acid)/halloysite nanocomposites

Rangika Thilan De Silva, Mohammad Soheilmoghaddam, Kheng Lim Goh, Mat Uzir Wahit, Sharifah Abd Hamid Bee, Siang Piao Chai, Pooria Pasbakhsh

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    The influence of processing methods on the thermo-mechanical properties of poly (lactic acid) (PLA) nanocomposites were investigated by preparing nanocomposites reinforced by halloysite nanotubes (HNTs) (from 0 to 10 [w/w%]) using solution casting (SC) and melt compounding (MC) methods. Statistical analysis revealed that the processing methods have a significant influence on the tensile properties, where nanocomposites prepared by MC have higher tensile properties compared to those by SC. Experimental results illustrated higher tensile strength and a drop in ductility under the higher strain rate as compared to the low strain rate for PLA/HNTs nanocomposites. At lower concentrations micrographs revealed that, HNTs dispersion was better for SC films as compared to MC, but more prominent HNTs aggregation at higher loadings. MC nanocomposites exhibited a high crystallinity as compared to SC, due to the recrystallization and nucleation effects. The thermal stability and activation energy increased with addition of HNTs, regardless of the processing methods.

    Original languageEnglish
    Pages (from-to)861-869
    Number of pages9
    JournalPolymer Composites
    Issue number3
    Publication statusPublished - 1 Mar 2016

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