Toughening of poly(lactic acid) by ethylene-co-vinyl acetate copolymer with different vinyl acetate contents

P. Ma, D.G. Hristova - Bogaerds, J.G.P. Goossens, A.B. Spoelstra, P.J. Lemstra

    Research output: Contribution to journalArticleAcademicpeer-review

    152 Citations (Scopus)
    4 Downloads (Pure)

    Abstract

    The well-known bio-based and biocompostable poly(lactic acid), PLA, suffers from brittleness and a low heat distortion temperature. In this paper, we address a possible route to make PLA tough(er) by blending with ethylene-co-vinyl acetate (EVA) with different vinyl acetate contents. The compatibility and phase morphology of the PLA/EVA blends was controlled by the ratio of vinyl acetate and ethylene in the random copolymers. Tough PLA/EVA blends with increased impact toughness, up to a factor of 30, were obtained with a maximum toughness at a vinyl acetate content of approximately 50 wt.%. The local deformation mechanism was well studied by TEM, SAXS and SEM. It revealed that internal rubber cavitation in combination with matrix yielding is the dominant toughening mechanism for the PLA/EVA blends under both impact and tensile testing conditions. --------------------------------------------------------------------------------
    Original languageEnglish
    Pages (from-to)146-154
    JournalEuropean Polymer Journal
    Volume48
    Issue number1
    DOIs
    Publication statusPublished - 2012

    Fingerprint Dive into the research topics of 'Toughening of poly(lactic acid) by ethylene-co-vinyl acetate copolymer with different vinyl acetate contents'. Together they form a unique fingerprint.

    Cite this