Controlling Ordered Structures of PS-b-P2VP Block Copolymer Thin Film by Tuning Solvent Evaporation Rate

Siti Aisyah Shamsudin, Takenaka Mikihito, Hasegawa Hirokazu

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Selective solvents for each block were chosen to induce specific blocks of the Polystyrene-block-poly(2vinylpyridine) (PS-b-P2VP) block copolymer (BCP) thin film with the purpose of comparing the degree of block swelling affected by solvent vapors onto the thin film. Solvents with high boiling point have been preferred for this study, because these solvents evaporate slowly, and allowing the block copolymer to self-assemble properly. Toluene and acetic acid were considered as suitable solvents for polystyrene (PS) and poly(2vinylpyridine) (P2VP), respectively. We prepared 1 wt% PS-b-P2VP BCP (79.0k-b-36.5k kg/mol) solution in a mixed solvent of toluene and tetrahydrofuran (THF) with a ratio of 7:3. Then, applied solvent annealing to the thin films with toluene and acetic acid at 21 °C for 3 hours, 6 hours and 9 hours. Thermal annealing to the thin films at 80 °C, 100 °C, 150°C, 200 °C and 250 °C for 24 hours was also applied. The morphology of the resulting thin film has been characterized using the atomic force microscopy (AFM). The formation of the block copolymer structure on thin film revealed highly affected by the evaporation rate owing to the decreased polymer mobility occurred by lower temperature of the solvent with high boiling point.

Original languageEnglish
Pages (from-to)75-83
Number of pages9
JournalMacromolecular Symposia
Volume371
Issue number1
DOIs
Publication statusPublished - 1 Feb 2017

Fingerprint

evaporation rate
Polystyrenes
block copolymers
Block copolymers
polystyrene
Evaporation
Tuning
tuning
Thin films
thin films
Toluene
toluene
Boiling point
acetic acid
Acetic acid
Acetic Acid
boiling
Annealing
acids
annealing

Keywords

  • atomic force microscopy (AFM)
  • diblock copolymers
  • microstructure
  • self-assembly
  • thin films

ASJC Scopus subject areas

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

Cite this

Controlling Ordered Structures of PS-b-P2VP Block Copolymer Thin Film by Tuning Solvent Evaporation Rate. / Shamsudin, Siti Aisyah; Mikihito, Takenaka; Hirokazu, Hasegawa.

In: Macromolecular Symposia, Vol. 371, No. 1, 01.02.2017, p. 75-83.

Research output: Contribution to journalArticle

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