Ferroelectric phase diagram of PVDF:PMMA

Mengyuan Li, Natalie Stingelin, Jasper J. Michels, Mark Jan Spijkman, Kamal Asadi, Kirill Feldman, Paul W.M. Blom, Dago M. De Leeuw

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

We have investigated the ferroelectric phase diagram of poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA). The binary nonequilibrium temperature composition diagram was determined and melting of α- and β-phase PVDF was identified. Ferroelectric β-PVDF:PMMA blend films were made by melting, ice quenching, and subsequent annealing above the glass transition temperature of PMMA, close to the melting temperature of PVDF. Addition of PMMA suppresses the crystallization of PVDF and, as a consequence, the roughness of blend films was found to decrease with increasing PMMA content. Using time-dependent 2D numerical simulations based on a phase-field model, we qualitatively reproduced the effect of PMMA on the crystallization rate and the spherulite shape of PVDF. The remnant polarization scaled with the degree of crystallinity of PVDF. The thermal stability of the polarization is directly related to the Curie temperature. We show that, at high temperature, the commodity ferroelectric PVDF:PMMA blends outperform the commonly employed specialty copolymer poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)).

Original languageEnglish
Pages (from-to)7477-7485
Number of pages9
JournalMacromolecules
Volume45
Issue number18
DOIs
Publication statusPublished - 25 Sep 2012

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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