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Crystallization Behavior and Dynamic Mechanical Properties of Poly(l-Lactic Acid) with Poly(Ethylene Glycol) Terminated by Benzoate

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Abstract

Effect of the addition of poly(ethylene glycol) terminated by benzoate (PEG-BA) on the crystallization behavior and dynamic mechanical properties of poly(l-lactic acid) PLLA is studied as compared with poly(ethylene glycol) (PEG-OH). It is found that PEG-BA is miscible with PLLA and shows good plasticizing effect. Because PEG-OH having the same degree of polymerization is immiscible with PLLA, the end group in PEG-BA, i.e., benzoate, plays an important role in the miscibility. Furthermore, PEG-BA does not induce the PLLA degradation at melt-processing, whereas PEG-OH leads to the hydrolysis degradation. Finally, the addition of PEG-BA pronounces the crystallization rate of PLLA at low crystallization temperatures and thus enhances the degree of crystallinity at conventional processing. Consequently, the temperature dependence of dynamic mechanical properties are similar to that for isotactic polypropylene.

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Acknowledgments

The authors would like to appreciate New Japan Chemical Co., Ltd. for their kind support to prepare PEG-BA.

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Authors and Affiliations

  1. School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, 923-1292, Japan

    Tong Huang, Motohiro Miura, Shogo Nobukawa & Masayuki Yamaguchi

Authors
  1. Tong Huang
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  2. Motohiro Miura
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  3. Shogo Nobukawa
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  4. Masayuki Yamaguchi
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Corresponding author

Correspondence to Masayuki Yamaguchi.

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Huang, T., Miura, M., Nobukawa, S. et al. Crystallization Behavior and Dynamic Mechanical Properties of Poly(l-Lactic Acid) with Poly(Ethylene Glycol) Terminated by Benzoate. J Polym Environ 22, 183–189 (2014). https://doi.org/10.1007/s10924-014-0638-y

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  • DOI: https://doi.org/10.1007/s10924-014-0638-y

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