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Grafting PMMA onto P(VDF-TrFE) by CF Activation via a Cu(0) Mediated Controlled Radical Polymerization Process

Jiani Liao1, Biyun Peng1, Shaobo Tan1

  • 1Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an, 710049, China.

Macromolecular Rapid Communications
|January 21, 2020
PubMed

Insights

Poly(methyl methacrylate) (PMMA) was grafted onto poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) side chains, tuning ferroelectric properties and reducing energy loss. This method offers a new strategy for functionalizing P(VDF-TrFE) copolymers.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Organic Chemistry

Background:

  • Poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) is a ferroelectric polymer with potential applications in energy storage.
  • Modifying P(VDF-TrFE) can enhance its dielectric and ferroelectric properties.
  • Grafting is a versatile technique for polymer modification.

Purpose of the Study:

  • To graft poly(methyl methacrylate) (PMMA) onto P(VDF-TrFE) side chains.
  • To investigate the effect of PMMA grafting on the ferroelectric properties of P(VDF-TrFE).
  • To explore a new method for functionalizing P(VDF-TrFE) via C-F bond activation.

Main Methods:

  • Graft copolymerization of PMMA onto P(VDF-TrFE) using activated C-F bonds.
  • Catalyst system: Cu(0)/2,2'-bipyridine.
  • Analysis of reaction kinetics and copolymer structure.

Main Results:

  • Successful synthesis of PMMA-grafted P(VDF-TrFE) copolymers.
  • Graft copolymerization followed first-order kinetics.
  • Tuning of displacement-electric field hysteresis from ferroelectric to anti-ferroelectric or linear-like dielectric behavior.
  • Reduced energy loss while maintaining discharged energy density.

Conclusions:

  • Direct activation of C-F bonds in P(VDF-TrFE) enables successful PMMA grafting.
  • Grafting rigid PMMA chains effectively modifies the ferroelectric and dielectric properties of P(VDF-TrFE).
  • This approach provides a viable strategy for functionalizing P(VDF-TrFE) for advanced material applications.
Keywords:
C F bond activationP(VDF-TrFE)dielectricsgraft copolymers

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