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Process, Characterization and Biodegradability of Aliphatic Aromatic Polyester/Sisal Fiber Composites

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Abstract

The biodegradability, morphology, and mechanical properties of composite materials made of Poly(butylene adipate-co-terephthalate) (PBAT) and sisal fiber (SF) were evaluated. Composites containing acrylic acid-grafted PBAT (PBAT-g-AA/SF) exhibited noticeably superior mechanical properties due to greater compatibility between the two components. The dispersion of SF in the PBAT-g-AA matrix was highly homogeneous as a result of ester formation between the carboxyl groups of PBAT-g-AA and hydroxyl groups in SF and the consequent creation of branched and cross-linked macromolecules. Each composite was subjected to biodegradation tests in Rhizopus oryzae compost. Morphological observations indicated severe disruption of film structure after 60 days of incubation, and both the PBAT and the PBAT-g-AA/SF composite films were eventually completely degraded. Water resistance of PBAT-g-AA/SF was higher than that of PBAT/SF, although weight loss of composites buried in Rhizopus oryzae compost indicated that both were biodegradable, even at high levels of SF substitution. The PBAT-g-AA/SF films were more biodegradable than those made of PBAT, implying a strong connection between these characteristics and biodegradability.

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Acknowledgments

The author thanks the National Science Council (Taipei City, Taiwan, R.O.C.) for financial support.

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Authors and Affiliations

  1. Department of Chemical and Biochemical Engineering, Kao Yuan University, Kaohsiung County, 82101, Taiwan, ROC

    Chin-San Wu

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  1. Chin-San Wu
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Correspondence to Chin-San Wu.

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Wu, CS. Process, Characterization and Biodegradability of Aliphatic Aromatic Polyester/Sisal Fiber Composites. J Polym Environ 19, 706–713 (2011). https://doi.org/10.1007/s10924-011-0318-0

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  • DOI: https://doi.org/10.1007/s10924-011-0318-0

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