Photoluminescent Color and Polarized Light Emission Tuning of Fluorene Derivatives Using a Photoreactive H-Bonded Liquid Crystalline Polymer

2010 ◽  
Vol 211 (16) ◽  
pp. 1741-1749 ◽  
Author(s):  
Nobuhiro Kawatsuki ◽  
Ryoichi Ando ◽  
Ryosuke Ishida ◽  
Mizuho Kondo ◽  
Yuta Minami
Keyword(s):  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Light Emission ◽  
Polarized Light ◽  
Crystalline Polymer

scholarly journals BARRIER PROPERTY OF POLARIZED LIGHT ORIENTED AZOBENZENE CONTAINING SIDE-CHAIN LIQUID CRYSTALLINE POLYMER

2011 ◽  
Vol 011 (7) ◽  
pp. 729-734
Author(s):  
Jian LIU ◽  
Mingle WANG ◽  
Xiaohua WU ◽  
Xiong CHEN ◽  
Yuanyuan LI
Keyword(s):  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Polarized Light ◽  
Crystalline Polymer ◽  
Barrier Property ◽  
Side Chain

scholarly journals Travelling waves on photo-switchable patterned liquid crystal polymer films directed by rotating polarized light

Soft Matter ◽  
2019 ◽  
Vol 15 (40) ◽  
pp. 8040-8050 ◽  
Author(s):  
Ling Liu ◽  
Dirk J. Broer ◽  
Patrick R. Onck
Keyword(s):  
Liquid Crystal ◽  
Polymer Films ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Travelling Waves ◽  
Polarized Light ◽  
Crystalline Polymer ◽  
Crystal Polymer ◽  
Flood Exposure ◽  
Polarization Of Light

In this paper we generate propagating surface waves on azobenzene-modified liquid crystalline polymer films that only requires flood exposure by rotating the linear polarization of light.

scholarly journals Liquid crystallinity and thermal properties of polyhedral oligomeric silsesquioxane/side-chain azobenzene hybrid copolymer

2020 ◽  
Vol 9 (1) ◽  
pp. 886-895
Author(s):  
Xiaotao Wang ◽  
Zhuofan Chen ◽  
Yiwan Huang ◽  
Xiaotie Ye ◽  
Jiacheng Wang ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Irradiation Time ◽  
Polarized Light ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Crystalline Polymer ◽  
Free Radical Copolymerization ◽  
Hybrid Copolymer ◽  
Oligomeric Silsesquioxane

AbstractAcrylic acid-modified polyhedral oligomeric silsesquioxane (AC-POSS) was synthesized by the reaction between the amine groups in polyhedral oligomeric silsesquioxane (POSS) and acrylic acid, which could dissolve in water and can be easily purified. Free-radical copolymerization was applied to synthesize azobenzene liquid crystalline polymer silsesquioxane (LCP-POSS) with different proportions of AC-POSS and liquid crystalline monomers. The trans-isomers of azobenzene moieties in LCP-POSS were gradually transformed to cis-isomers with increasing ultraviolet irradiation time. The photoisomerization reaction of liquid crystalline polymer (LCP) and LCP-POSS showed the first-order dynamic reaction. Compared with the LCP, the photoisomerization rate constant of LCP-POSS was decreased due to the space steric hindrance of the POSS as a rigid segment. The phase transition temperature of liquid crystalline in LCP-POSS increased with increasing POSS content, and the liquid crystalline texture in LCP-POSS became smaller under the polarized light. With further increasing the POSS content (>50 wt%) in LCP-POSS, the ordered structure of the liquid crystalline phase was gradually affected, resulting in one-way liquid crystal (LC) phase behavior. The synthesized LCP-POSS has LC properties, light-responsive properties, and thermal stability. When the POSS is introduced into the LC material, the phase state of the LC material will become more abundant and the LC phase will become more stable. The significance of this study is to develop and extend its applications as stimuli-responsive materials and devices.

Control of Chirality of an Azobenzene Liquid Crystalline Polymer with Circularly Polarized Light

2000 ◽  
Vol 122 (51) ◽  
pp. 12646-12650 ◽  
Author(s):  
Gabriel Iftime ◽  
François Lagugné Labarthet ◽  
Almeria Natansohn ◽  
Paul Rochon
Keyword(s):  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Polarized Light ◽  
Crystalline Polymer ◽  
Circularly Polarized Light ◽  
Circularly Polarized

38.3: Polarized Light LCD Backlight Based on Liquid Crystalline Polymer Film: A New Manufacturing Process

2004 ◽  
Vol 35 (1) ◽  
pp. 1178 ◽  
Author(s):  
Hugo J. Cornelissen ◽  
H. P. M. Huck ◽  
Dirk J. Broer ◽  
S. J. Picken ◽  
C. W. M. Bastiaansen ◽  
...  
Keyword(s):  
Polymer Film ◽  
Manufacturing Process ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Polarized Light ◽  
Crystalline Polymer

Observing the relaxation of molecular orientation in sheared liquid crystalline polymer solutions

1990 ◽  
Vol 48 (4) ◽  
pp. 1092-1093
Author(s):  
Wendy Putnam ◽  
Christopher Viney
Keyword(s):  
Molecular Orientation ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Polymer Processing ◽  
Molecular Alignment ◽  
Global Alignment ◽  
Shear Direction ◽  
Axial Strength ◽  
Strength And Stiffness

Liquid crystalline polymers (solutions or melts) can be spun into fibers and films that have a higher axial strength and stiffness than conventionally processed polymers. These superior properties are due to the spontaneous molecular extension and alignment that is characteristic of liquid crystalline phases. Much of the effort in processing conventional polymers goes into extending and aligning the chains, while, in liquid crystalline polymer processing, the primary microstructural rearrangement involves converting local molecular alignment into global molecular alignment. Unfortunately, the global alignment introduced by processing relaxes quickly upon cessation of shear, and the molecular orientation develops a periodic misalignment relative to the shear direction. The axial strength and stiffness are reduced by this relaxation.Clearly there is a need to solidify the liquid crystalline state (i.e. remove heat or solvent) before significant relaxation occurs. Several researchers have observed this relaxation, mainly in solutions of hydroxypropyl cellulose (HPC) because they are lyotropic under ambient conditions.

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