화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.25, No.12, 1163-1171, December, 2017
DOI10.1007/s13233-017-5154-1  Export Citation
Performance improvement of poly(vinylidene fluoride) by in situ copolymerization of methyl methacrylate and ionic liquid
Xiujie Bi, Shixin Song, and Shulin Sun†
  • Engineering Research Center of Synthetic Resin and Special Fiber, Ministry of Education, Department of Chemical Engineering, Changchun University of Technology, Changchun 130012, P. R. China
E-mail:
1-Butyl-3-vinylimdazolium tetrafluoroborate ([BVIM][BF4]) was used as ionic liquid to in situ copolymerized with methyl methacrylate (MMA) in poly(vinylidene fluoride) (PVDF) solution by the free radical polymerization method. The content of [BVIM][BF4] in the copolymerized monomers ranges from 0 to 50%. Soxhlet extraction results showed that more than 60% P(MMA-co-[BVIM][BF4]) were grafted onto the PVDF chains and the grafting degree was higher than 15%. 1H NMR tests proved the occurrence of grafting reaction. SEM morphology indicated that phase separation took place for the in situ PVDF/P(MMA-co-[BVIM][BF4]) composites when the [BVIM][BF4] content was more than 40 wt%. FTIR and XRD measurements indicated the crystal transformation of PVDF from α-phase to ß/γ phase due to the ion-dipole interaction between PVDF and [BVIM][BF4]. Furthermore, the introduction of [BVIM][BF4] into the in situ PVDF/P(MMA-co-[BVIM][BF4]) composites enhanced the electrical conductivity and dielectric constant of PVDF. The present method improved the stability of ionic liquid in the PVDF composites and the in situ PVDF/P(MMA-co-[BVIM][BF4]) composites show potential applications in sensor, actuator and battery fields.
Keywords:poly(vinylidene fluoride);ionic liquid;in situ polymerization;electrical conductivity;dielectricity
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