Layer-by-layer ionomer films made from poly(styrene-co-styrenesulfonic acid) and poly(methyl methacrylate-co-4-vinylpyridine) in tetrahydrofuran

Wenjie Chen, Masanori Hara

Research output: Contribution to journalArticlepeer-review

Abstract

Thin films were fabricated layer-by-layer (LbL) via ionic bonds formed between a cationic ionomer and an anionic ionomer, which were produced via proton transfer from poly(styrene-co-styrenesulfonic acid) to poly(methyl methacrylate-co-4-vinylpyridine) in an organic solvent, tetrahydrofuran. Ionic contents of the ionomers were very low down to 5.6 mol %, much lower than usual polyelectrolytes. The build up of the LbL films was demonstrated by UV/vis spectroscopy: the absorbance of the phenyl rings in styrene residues increased with the number of depositions (thus the number of layers). Transmission electron microscopy observation of strained thin films showed unique deformation mode, involving many bands that developed both in the parallel and perpendicular directions to the stress axis. This is quite different from the deformation modes seen for ionomer blend films and for coextruded polystyrene/poly(methyl methacrylate) multilayer tapes.

Original languageEnglish (US)
Pages (from-to)101-105
Number of pages5
JournalJournal of Polymer Science, Part B: Polymer Physics
Volume50
Issue number2
DOIs
StatePublished - Jan 15 2012

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Keywords

  • deformation modes
  • ionomers
  • layer-by-layer deposition
  • thin films

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