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Studies on Melt Processable Biocomposites of Polylactic Acid

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Abstract

Melt processable microcrystalline cellulose (MCC)/poly(lactic acid) (PLA) composites were successfully prepared by twin-screw extrusion. Several characterization techniques were used to investigate the effect of MCC on rheological behavior, morphology, crystallization and melting behavior of the PLA and structure–property correlation of the MCC/PLA composites has been established. Rheological measurements showed that the addition of MCC has a dramatic influence on the low frequency relaxations of PLA chains and above 5 % of MCC, it forms percolated network structure. Differential scanning calorimeter analysis showed that MCC acted as nucleating agent enhancing crystallization below the percolation concentration. Properties of MCC/PLA composites have been compared with that of talc and CaCO3 filled composites. Talc is found to be more effective in crystallizing PLA than MCC and CaCO3. MCC/PLA composites are found be melt processable like that of talc and CaCO3 filled PLA composites.

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Acknowledgments

One of the authors, Seena Joseph thanks University Grant Commission, New Delhi, India for granting the Dr D.S. Kothari Post Doctoral Fellowship.

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Authors and Affiliations

  1. Department of Polymer and Surface Engineering, Institute of Chemical Technology, Matunga, Mumbai, India

    Seena Joseph & P. A. Mahanwar

  2. Polymer Science and Engineering Division, National Chemical Laboratory, Pune, India

    E. Deenadayalan

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  1. Seena Joseph
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  2. E. Deenadayalan
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  3. P. A. Mahanwar
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Correspondence to Seena Joseph.

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Joseph, S., Deenadayalan, E. & Mahanwar, P.A. Studies on Melt Processable Biocomposites of Polylactic Acid. J Polym Environ 23, 321–333 (2015). https://doi.org/10.1007/s10924-014-0668-5

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  • DOI: https://doi.org/10.1007/s10924-014-0668-5

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