Polymethacryloylaminoarylmethacrylates: New Concept of Photoalignment Materials for Liquid Crystals

Vretik, L. O.; Syromyatnikov, V. G.; Zagniy, V. V.; Paskal, L.; Yaroshchuk, O.; Dolgov, L.; Kyrychenko, V.; Lee, C.-D.

doi:10.1080/15421400701680846

Cited by 14 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, good photoaligning properties of methacrylamidoaryl methacrylates were found. 71,72 Crosslinkings in these materials are formed due to radical photopolymerization of methacryloyl groups accompanied with photo-Fries rearrangements (Fig. 5f).…”

Section: Basic Photoaligning Materialsmentioning

confidence: 99%

Photoalignment of liquid crystals: basics and current trends

2012

View full text Add to dashboard Cite

Section: Basic Photoaligning Materialsmentioning

confidence: 99%

Photoalignment of liquid crystals: basics and current trends

2012

View full text Add to dashboard Cite

“…The copolymer 4-(N-methacryloylamino)phenylmeth acrylate with 2,2,3,3,4,4,5,5-octafluoropenthylmethacrylate (MAPhM-F8), whose structure is as presented in figure 1, was recently developed jointly by Syromyatnikov's group from the Taras Shevchenko Kyiv National University of Ukraine, Yaroshchuk's group from the Institute of Physics of NASU in Ukraine and Lee's group from the Industrial Technology Research Institute, Taiwan [17,18]. It has good photostability because of its high transparency in the visible and near UV spectral ranges.…”

Section: Introductionmentioning

confidence: 99%

Mechanism in determining pretilt angle of liquid crystals aligned on fluorinated copolymer films

Wang

et al. 2009

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

This work explores the surface treatment of copolymer materials with fluorinated carbonyl groups in various mole fractions by ultraviolet irradiation and ion-beam (IB) bombardment and its effect on liquid crystal (LC) surface alignments. X-ray photoemission spectroscopic analysis confirms that the content of the grafted CF 2 side chains dominates the pretilt angle. A significant increase in oxygen content is responsible for the increase in the polar surface energy during IB treatment. Finally, the polar component of the surface energy dominates the pretilt angle of the LCs.

show abstract

“…In this study, we demonstrate the alignment properties of nematic liquid crystal (NLC) on a fluorinated polymer film S46-F8 [22,23] treated by two different noncontact methods using the linearly polarized UV light (LPUVL) irradiation and argon ion beams (IB) bombardment. This material is developed jointly by the Syromyatnikov's group from Taras Shevchenko Kyiv National University of Ukraine, Yaroshchuk's group from Institute of Physics of NASU of Ukraine, and Lee's group from the Industrial Technology Research Institute, Taiwan.…”

Section: Introductionmentioning

confidence: 99%

Surface Alignment with High Pretilt Angle Using the Photoreactive Fluorinated Polymer Films

Wang

et al. 2009

Molecular Crystals and Liquid Crystals

View full text Add to dashboard Cite

A newly developed fluorinated polymer film for liquid crystal alignment by applying ultra-violet (UV) irradiation or ion beam treatment is studied in this work. The surface alignment with high pretilt angle is achieved by the UV treatment. The induced pretilt angle by ion beam treatment on this photo-reactive polymer film, however, is relatively small. Surface analyses by x-ray photoemission spectroscopy and contact angle measurement are carried out to deduce the underlying mechanism. The result shows that the higher content of the fluorinated side-chain in polymer contribute to the lower surface energy and the higher pretilt angle. The atomic ratio of fluorine is largely decreased by ion beam treatments. The alignment uniformity and stability of the surfaces treated by linearly-polarized UV light and ion beam bombardment are also demonstrated.

show abstract

Polymethacryloylaminoarylmethacrylates: New Concept of Photoalignment Materials for Liquid Crystals

Cited by 14 publications

References 17 publications

Photoalignment of liquid crystals: basics and current trends

Photoalignment of liquid crystals: basics and current trends

Mechanism in determining pretilt angle of liquid crystals aligned on fluorinated copolymer films

Surface Alignment with High Pretilt Angle Using the Photoreactive Fluorinated Polymer Films

Contact Info

Product

Resources

About