• 文献标题:   Enhanced Crystallization Kinetics of PLLA by Ethoxycarbonyl Ionic Liquid Modified Graphene
  • 文献类型:   Article
  • 作  者:   XU P, CUI ZP, RUAN G, DING YS
  • 作者关键词:   ionic liquid, graphene, plla, crystallization, dielectric behavior
  • 出版物名称:   CHINESE JOURNAL OF POLYMER SCIENCE
  • ISSN:   0256-7679 EI 1439-6203
  • 通讯作者地址:   Hefei Univ Technol
  • 被引频次:   5
  • DOI:   10.1007/s10118-019-2192-5
  • 出版年:   2019

▎ 摘  要

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 (N) relaxation that corresponds to the longest normal mode motion at 110-140 degrees 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.