Phase separated structure-electro-optical property relationships of (Polymer/Liquid Crystal) composite film

Tisato Kajiyama, Kwansun Park, Fumihiko Usul, Hirotsugu Kikuchi, Atsushi Takahara

Research output: Contribution to journalConference articlepeer-review

12 Citations (Scopus)

Abstract

The (polymer/liquid crystal) composite films were prepared from a solution of poly(dipropylfumarate) (Pdi-IPF) and nematic liquid crystal (LC) by a solvent casting method. The phase separated structure of the composite film was controlled by solvent evaporation rate. The light scattering (LS) profile of a (Pdi-iPF/LC: 40/60 w/w) solution during solvent evaporation, exhibited a periodic structure, indicating that the phase separated structure was formed by spinodal decomposition. The aggregation structure of the composite film was investigated on the basis of a scanning electron microscope(SEM). SEM observation of the composite film suggested the presence of periodicity and dual connectivity of polymer and LC phases. The faster the solvent was evaporated, the smaller the LC channel (domain) size in the composite film was. The electro-optical behavior of the composite film was strongly depended on the LC channel (domain) size in the composite film. The transmittance increased, and also the rise and decay response times(tR and tD) decreased and increased, respectively, with an increase in size of LC channel (domain).

Original languageEnglish
Pages (from-to)122-131
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1911
DOIs
Publication statusPublished - Aug 13 1993
EventLiquid Crystal Materials, Devices, and Applications II 1993 - San Jose, United States
Duration: Jan 31 1993Feb 5 1993

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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