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Studies on crystal transition of polyamide 11 nanocomposites by variable-temperature X-ray diffraction

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Abstract

Polyamide 11 (PA11) and its nanocomposites with different organoclay loadings were prepared by melt-compounding and subsequent pelletizing. The crystal phase transitions of PA11 and its clay nanocomposites were investigated by variable-temperature X-ray diffraction. It was found that the Brill transition of the nanocomposite was 20 K higher than that of the neat PA11 for both heating and cooling processes. The PA11 d-spacings of the nanocomposites were observed to be smaller than those of the neat PA11 for melt crystallization. The constraints imposed by the addition of layered clay, restricting the thermal expansion of the polymer chains, are probably responsible for such a reduction of the d-spacing.

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Authors and Affiliations

  1. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China

    Tian-xi Liu  (刘天西) & Chun Wei  (韦春)

  2. State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200433, China

    Tian-xi Liu  (刘天西) & Dan Chen

  3. Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore, Singapore

    In Yee Phang

Authors
  1. Tian-xi Liu  (刘天西)
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  2. Dan Chen
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  3. In Yee Phang
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  4. Chun Wei  (韦春)
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Corresponding authors

Correspondence to Tian-xi Liu  (刘天西) or Chun Wei  (韦春).

Additional information

This work was financially supported by the National Natural Science Foundation of China (No. 51125011), Guangxi Small Highland Innovation Team of Talents in Colleges and Universities, and Guangxi Funds for Specially-appointed Expert.

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Liu, Tx., Chen, D., Phang, I.Y. et al. Studies on crystal transition of polyamide 11 nanocomposites by variable-temperature X-ray diffraction. Chin J Polym Sci 32, 115–122 (2014). https://doi.org/10.1007/s10118-014-1383-3

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  • DOI: https://doi.org/10.1007/s10118-014-1383-3

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