"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Optical response of cyanoazomethine liquid crystal droplets in PDLC films based on a polysulfone matrix

L. MARIN1,* , E. PERJU1

Affiliation

  1. “P. Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, Iasi, Romania

Abstract

The optical behaviour of the liquid crystal 4-[4-(n-butyloxy)phenylene-imino-methylidene]benzonitrile in composite films based on the polysulfone UDEL as polymer matrix was investigated by means of polarizing optical microscopy (POM), UVvis and fluorescence spectroscopy. The composites were prepared by the solvent-induced phase separation (SIPS) and thermal-induced phase separation (TIPS) method. For some composite compositions, the formation of polymer dispersed liquid crystal systems was detected. POM observations of composites showed possible relations between morphological features and fluorescence characteristics, depending upon preparation conditions. The different fluorescence behaviour has been discussed in terms of differences in the aggregation degree of liquid crystal molecules arising from the dominant liquid crystal - liquid crystal, liquid crystal – polysulfone molecular interactions..

Keywords

Polymer-dispersed liquid crystals, Polarizing light microscopy, Photoluminescence.

Submitted at: April 10, 2010
Accepted at: June 16, 2010

Citation

L. MARIN, E. PERJU, Optical response of cyanoazomethine liquid crystal droplets in PDLC films based on a polysulfone matrix, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 6, pp. 1378-1384 (2010)