Phase-separated structure--electro-optical property relationships of polymer/liquid-crystal composite film

Tisato Kajiyama; Kwan-sun Park; Fumihiko Usui; Hirotsugu Kikuchi; Atsushi Takahara

doi:10.1117/12.151211

13 August 1993 Phase-separated structure--electro-optical property relationships of polymer/liquid-crystal composite film

Tisato Kajiyama, Kwan-sun Park, Fumihiko Usui, Hirotsugu Kikuchi, Atsushi Takahara

Author Affiliations +

Proceedings Volume 1911, Liquid Crystal Materials, Devices, and Applications II; (1993) https://doi.org/10.1117/12.151211
Event: IS&T/SPIE's Symposium on Electronic Imaging: Science and Technology, 1993, San Jose, CA, United States

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 ((tau) _R and (tau) _D), decreased and increased, respectively, with an increase in size of LC channel (domain).

Citation Download Citation

Tisato Kajiyama, Kwan-sun Park, Fumihiko Usui, Hirotsugu Kikuchi, and Atsushi Takahara "Phase-separated structure--electro-optical property relationships of polymer/liquid-crystal composite film", Proc. SPIE 1911, Liquid Crystal Materials, Devices, and Applications II, (13 August 1993); https://doi.org/10.1117/12.151211

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available