Mechanical behavior, structure, and reinforcement processes of TEMPO-oxidized cellulose reinforced poly(lactic) acid

Authors

  • Mindaugas Bulota,

    Corresponding author
    1. Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, FI-00076 Aalto, Finland
    • Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, FI-00076 Aalto, Finland

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  • Arja-Helena Vesterinen,

    1. Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
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  • Mark Hughes,

    Corresponding author
    1. Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, FI-00076 Aalto, Finland
    • Department of Forest Products Technology, School of Chemical Technology, Aalto University, P.O. Box 16300, FI-00076 Aalto, Finland

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  • Jukka Seppälä

    1. Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, P.O. Box 16100, FI-00076 Aalto, Finland
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Abstract

Poly(lactic) acid (PLA) was reinforced with acetylated TEMPO-oxidized fibrillated cellulose (TOFC) prepared from birch pulp. Composite films were studied using dynamic mechanical thermal analysis, differential scanning calorimetry (DSC), as well as static mechanical testing. The storage modulus as well as tensile strength of PLA was improved on the addition of 30 wt% of TOFC by approximately 50% and 40%, respectively. Thermal stability as well as strength properties in moist environments (up to 90% relative humidity) was significantly improved at 15, 20, 25, and 30 wt% of TOFC. DSC showed that crystallization from solution took place during preparation of the composite films and was much greater than melt crystallization. POLYM. COMPOS., 2012. © 2013 Society of Plastics Engineers

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