Summary
Organosolv lignin was used as organic filler for polypropylene (PP) and poly(ethene-co-vinylacetate) (EVA) containing 13wt-% vinylacetate. As a function of the lignin content, which was varied between 0 and 30wt-%, mechanical properties such as Young's modulus, yield stress, fracture stress, and elongation at break of the thermoplastic lignin-based compounds were measured. Both lignin-filled thermoplastics exhibit pronounced matrix reinforcement with increasing lignin content. Due to better interfacial adhesion between lignin and EVA, 30wt-% lignin addition to EVA doubles Young's modulus without sacrificing high elongation at break.
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Rösch, J., Mülhaupt, R. Mechanical properties of organosolv-lignin-filled thermoplastics. Polymer Bulletin 32, 361–365 (1994). https://doi.org/10.1007/BF00308549
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DOI: https://doi.org/10.1007/BF00308549