Influence of substrate surfaces on thermal behavior of photopolymerization-induced phase separation of liquid crystal and polymer

Takeshi Murashige, Hideo Fujikake, Seiichiro Ikehata, Fumio Sato

Research output: Contribution to journalLetter

1 Citation (Scopus)

Abstract

We studied photopolymerization-induced phase separation (P-PIPS) of polymer fibers and liquid crystal (LC) formed at various thicknesses between glass substrates using a differential scanning calorimeter to find the influence of substrates on the P-PIPS phenomenon. In this case, the energy of ultraviolet light adsorbed by the solution film of the LC and monomer was kept constant in a unit area even when the solution thickness was changed. As an experimental result, the thermal phase-transition sequence behavior of the LC component in the formed composite film of smaller thickness approached that of the original pure LC. The total reaction heat for the polymerization in any thickness solutions did not make meaningful difference. These indicate that the phase separation can be promoted by decreasing the distance between the substrates even under constant polymerization degree, which depends on the polymerization reaction.

Original languageEnglish
Pages (from-to)L27-L29
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume42
Issue number1 A/B
DOIs
Publication statusPublished - 2003 Jan 15
Externally publishedYes

Keywords

  • Chemical reaction heat
  • Differential scanning calorimeter
  • Liquid crystal
  • Photopolymerization-induced phase separation
  • Polymer
  • Substrate

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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