Full Permanent Memory Effect in PDLC Films
- Resource Type
- Authors
- Ana Mouquinho; Rafaela Santos; João Sotomayor; Maria Catarina Silva
- Source
- Molecular Crystals and Liquid Crystals. 611:123-131
- Subject
- chemistry.chemical_classification
Acrylate
Materials science
Opacity
General Chemistry
Polymer
Condensed Matter Physics
Methacrylate
Polyvinyl alcohol
chemistry.chemical_compound
chemistry
Polymerization
Chemical engineering
Liquid crystal
Polymer chemistry
General Materials Science
Stable state
- Language
- ISSN
- 1563-5287
1542-1406
Permanent memory effect in polymer dispersed liquid crystal (PDLC) films prepared by thermal polymerization induced phase separation (PIPS) were studied. New trimethylolpropane trimethacrylate (TMP3MA)/poly(propylene glycol) methacrylate (PPGMA375)/E7/AIBN and pentaerythritol tetraacrylate (PE4A)/poly(propylene glycol) acrylate (PPGA475)/E7/AIBN PDLC films showed 86% permanent memory effect with E90 = 6 V/μm and memory state contrast of 70% and full permanent memory effect with E90 = 3 V/μm and total memory state contrast, respectively. These materials with two stable states (opaque and transparent) seem to be promising for the development of a new class of optical memories as they can be used for electrically write information, optically read the written information and they can be thermally erased back to the initial scattered state.