Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 24, Issue 5, Pages 453-459Publisher
WILEY
DOI: 10.1002/pat.3103
Keywords
polymer dispersed liquid crystal; microstructure; electro-optical properties; liquid crystals; photopolymerization
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Funding
- National Natural Science Fund for Distinguished Young Scholars [51025313]
- National Natural Science Foundation [50973010, 51203011]
- Science and Technology Project of Beijing, China [D090803044209001]
- State Key Laboratory for Advanced Metals and Materials
- Open Research Fund of the State Key Laboratory of Bioelectronics (Southeast University)
- Fundamental Research Funds for the Central Universities [FRF-TP-12-032A]
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In this paper, polymer dispersed liquid crystals (PDLC) films with LC content as low as 40wt% were prepared, and the electro-optical properties were carefully investigated. To accomplish this, different (meth)acrylate copolymerizaiton monomers have been used. The electro-optical properties and morphologies of the PDLC films were strongly influenced by the chemical structure of copolymerization monomers (hydroxypropyl methacrylate (HPMA), glycidyl methacrylate, hydroxypropyl acrylate) and their feed ratio. Lower driven voltage and higher contrast ratio were achieved when the PDLC films showed a morphology with suitably LC domain size. At high HPMA content, a thin polymer film was formed on the surface of PDLC samples, which is beneficial to decrease the total LC content in PDLC devices. Copyright (c) 2013 John Wiley & Sons, Ltd.
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