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Isothermal crystallization behavior and unique banded spherulites of hydroxyapatite/poly(L-lactide) nanocomposites

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Abstract

Hydroxyapatite/poly(L-lactide) (HA/PLLA) nanocomposites were prepared by the solvent mixing method. The isothermal crystallization behavior was studied by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). The results show that the crystallization behavior of HA/PLLA composites was strongly affected by the content of HA and crystallization temperature, and the addition of HA could promote nucleation and enhance the crystallization rate. When isothermal crystallization was carried out at 110°C, the HA/PLLA nanocomposite with 1% HA content crystallized most rapidly among all the composites and the half crystallization time was only 1.0 min. Banded spherulites were observed for the HA/PLLA composites, but no banded spherulites were seen in the crystals of PLLA under the same condition.

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Authors and Affiliations

  1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China

    Jun-chao Wei, Jing-ru Sun, Hai-juan Wang, Xue-si Chen  (陈学思) & Xia-bin Jing

  2. Graduate School of Chinese Academy of Sciences, Beijing, 100039, China

    Jun-chao Wei, Xue-si Chen  (陈学思) & Xia-bin Jing

Authors
  1. Jun-chao Wei
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  2. Jing-ru Sun
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  3. Hai-juan Wang
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  4. Xue-si Chen  (陈学思)
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  5. Xia-bin Jing
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Corresponding author

Correspondence to Xue-si Chen  (陈学思).

Additional information

This work was supported by the National Natural Science Foundation of China (Key Project No. 50733003 and Project No. 20604030), the International Cooperation fund of Science and Technology (Key project 20071314) from the Ministry of Science and Technology of China, and the fund from Chinese Academy of Sciences (KGCX-YW-208).

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Wei, Jc., Sun, Jr., Wang, Hj. et al. Isothermal crystallization behavior and unique banded spherulites of hydroxyapatite/poly(L-lactide) nanocomposites. Chin J Polym Sci 28, 499–507 (2010). https://doi.org/10.1007/s10118-010-9060-7

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  • DOI: https://doi.org/10.1007/s10118-010-9060-7

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