Effects of oxygen heterocyclic acrylate monomers on the morphologies and electro-optical properties of polymer dispersed liquid crystal composite films

Optik ◽  
2021 ◽  
Vol 229 ◽  
pp. 166254
Author(s):  
Mohsin Hassan Saeed ◽  
Shuaifeng Zhang ◽  
Meina Yu ◽  
Le Zhou ◽  
Junyi Huang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Composite Films ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed ◽  
Acrylate Monomers ◽  
Crystal Composite

PHASE TRANSITION INVESTIGATIONS IN POLYMER/LIQUID CRYSTAL COMPOSITE MATERIALS

1999 ◽  
Vol 13 (21) ◽  
pp. 759-767 ◽  
Author(s):  
DOINA MANAILA-MAXIMEAN ◽  
MAURIZIO FURLANI ◽  
RODICA BENA ◽  
BENGT-ERIK MELLANDER ◽  
CONSTANTIN ROSU ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Composite Films ◽  
Scanning Calorimetry ◽  
Polymer Dispersed Liquid Crystal ◽  
Polarized Microscopy ◽  
Polymer Dispersed ◽  
Thermally Stimulated Depolarization ◽  
Crystal Composite ◽  
Polymer Liquid Crystal

We prepared polymer dispersed liquid crystal (PDLC) composite films using polymethyl methacrylate (PMMA) and the ferroelectric liquid crystal (LC) Felix 015/000 (Hoechst) by the solvent-induced phase separation method. We studied the phase transitions by the thermally stimulated depolarization currents (TSDC) method and by differential scanning calorimetry (DSC), for the composite film and the corresponding liquid crystal. Polarized microscopy was also used to characterize the phase transitions. When the LC is mixed with the PMMA, its characteristic transition temperatures are shifted down a few degrees and the current peaks revealed by the TSDC method are broadened due to the dispersion of microdroplets and the consequential presence of a large interface between the LC and the polymer matrix.

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