Citation: Pei Xu, Zhao-Pei Cui, Gang Ruan, Yun-Sheng Ding. Enhanced Crystallization Kinetics of PLLA by Ethoxycarbonyl Ionic Liquid Modified Graphene[J]. Chinese Journal of Polymer Science, ;2019, 37(3): 243-252. doi: 10.1007/s10118-019-2192-5 shu

Enhanced Crystallization Kinetics of PLLA by Ethoxycarbonyl Ionic Liquid Modified Graphene

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

Corresponding author: Pei Xu, chxuper@hfut.edu.cn Yun-Sheng Ding, dingys@hfut.edu.cn
Received Date: 4 July 2018
Revised Date: 23 September 2018
Accepted Date: 25 September 2018
Available Online: 2 November 2018

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 α_N 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.
- Ionic liquid,
- Graphene,
- PLLA,
- Crystallization,
- Dielectric behavior
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