Ferroelectric poly(vinylidene fluoridetrifluoroethylene- chlorotrifluoroethylene)s: Effect of molecular weight on dielectric property

Chuanqi Zhao, Maotian Guo, Yingying Lu, Qing Wang

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

A series of ferroelectric poly(vinylidene fluoride- trifluoroethylenechlorotrifluoroethylene), P(VDF-TrFE-CTFE), have been synthesized by a two-step approach. The first step is copolymerization of VDF and CTFE via solution or suspension methods to produce P(VDF-CTFE) copolymers with different molecular weights. The second step is partial de-chlorination to convert copolymers into P(VDF-TrFE-CTFE) terpolymers with precisely controlled compositions. The effect of molecular weight, molecular weight distribution and uniaxially stretching on the dielectric properties has been investigated over a broad range of temperature and frequency. The X-ray diffraction patterns and DSC curves demonstrate the coexistence of the multiple phases in the terpolymers. The dielectric spectra depict the local relaxation processes and relaxor ferroelectric behavior on the basis of the dielectric loss tangent as a function of temperature.

Original languageEnglish (US)
Pages (from-to)52-58
Number of pages7
JournalMacromolecular Symposia
Volume279
Issue number1
DOIs
StatePublished - May 1 2009

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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