Unique difference in transition temperature of two similar fluorinated side chain polymers forming hexatic smectic phase: Poly{2-(perfluorooctyl)ethyl acrylate} and Poly{2-(perfluorooctyl)ethyl vinyl ether}

Ryohei Ishige, Takamichi Shinohara, Kevin L. White, Ahmed Meskini, Mustapha Raihane, Atsushi Takahara, Bruno Ameduri

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The surface properties of comb-shaped polymers with perfluorooctyl ethyl side-chains are strongly related to the ordered structure of the side-chains at the surface. In this work, the thermal behavior, liquid-crystalline structure, and functional group orientation of comb-shaped polymers containing perfluorooctyl side-chains with poly(acrylate) (PFA-C8) and poly(vinyl ether) (PFAVE8) backbones are discussed based on DSC, synchrotron-source X-ray diffraction, and FTIR measurements. Despite the similar tilted hexatic smectic structures and packing entropies, the isotropization temperature, Ti, of the PFA-C8 is significantly higher than the PFAVE8. Detailed characterization of the conformation, alignment, and organization of the perfluorooctyl side-chains indicate that the difference in Ti is related to the configuration of side-chains and interactions between the carbonyl groups along the acrylate backbone. The present findings show that the type of the linkage between the polymer backbone and fluorinated side-chain mesogens affects the conformation and plays an important role in determining thermal behavior.

Original languageEnglish
Pages (from-to)3860-3870
Number of pages11
JournalMacromolecules
Volume47
Issue number12
DOIs
Publication statusPublished - Jun 24 2014

All Science Journal Classification (ASJC) codes

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

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