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Enhanced Crystallization Kinetics of PLLA by Ethoxycarbonyl Ionic Liquid Modified Graphene

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Abstract

To investigate the performance of graphene (Gra) modified with ethoxycarbonyl ionic liquid (IL), chain mobility and crystallization kinetics of poly(L-lactic acid) (PLLA), a series of PLLA nanocomposites have been prepared using solution-cast method. IL can improve the dispersion of Gra in PLLA matrix and the samples containing IL have higher growth rate of PLLA spherulite than neat PLLA does. PLLA/IL/Gra and PLLA/2Gra exhibit the same relaxation strength and time of αN relaxation that corresponds to the longest normal mode motion at 110−140 °C. PLLA/IL/Gra shows a faster crystallization rate than PLLA/2Gra does, which might be attributed to the Gra-imidazolium cation interaction in IL modified Gra, the significant dispersion effect of IL at Gra surface, and the increase of nuclei density of PLLA/IL/Gra.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 51603060) and the Fundamental Research Funds for the Central Universities (No. JZ2017YYPY0250).

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei, 230009, China

    Pei Xu, Zhao-Pei Cui, Gang Ruan & Yun-Sheng Ding

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  1. Pei Xu
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  2. Zhao-Pei Cui
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Correspondence to Pei Xu or Yun-Sheng Ding.

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Xu, P., Cui, ZP., Ruan, G. et al. Enhanced Crystallization Kinetics of PLLA by Ethoxycarbonyl Ionic Liquid Modified Graphene. Chin J Polym Sci 37, 243–252 (2019). https://doi.org/10.1007/s10118-019-2192-5

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