Homeotropic alignment on surface-initiated liquid crystalline polymer brushes

2005 ◽  
Vol 15 (3) ◽  
pp. 381 ◽  
Author(s):  
Paul J. Hamelinck ◽  
Wilhelm T. S. Huck
Keyword(s):  
Polymer Brushes ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer ◽  
Homeotropic Alignment

scholarly journals Spontaneous Tilting Transition in Liquid-Crystalline Polymer Brushes

2019 ◽  
Vol 52 (18) ◽  
pp. 6988-6997 ◽  
Author(s):  
S. Blaber ◽  
N. M. Abukhdeir ◽  
M. W. Matsen
Keyword(s):  
Polymer Brushes ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer

Liquid-crystalline polymer brushes: deformation and microphase segregation

1998 ◽  
Vol 8 (1-2) ◽  
pp. 179-189 ◽  
Author(s):  
T.M. Birshtein ◽  
A.A. Mercurieva ◽  
L.I. Klushin ◽  
A.A. Polotsky
Keyword(s):  
Polymer Brushes ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Crystalline Polymer

scholarly journals Engineering the anchoring behavior of nematic liquid crystals on a solid surface by varying the density of liquid crystalline polymer brushes

Soft Matter ◽  
2018 ◽  
Vol 14 (37) ◽  
pp. 7569-7577 ◽  
Author(s):  
Xiao Li ◽  
Takuya Yanagimachi ◽  
Camille Bishop ◽  
Coleman Smith ◽  
Moshe Dolejsi ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Solid Surface ◽  
Polymer Brushes ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Nematic Liquid Crystals ◽  
Crystalline Polymer

Using liquid crystalline polymer brushes to continuously control the anchoring transition of 5CB by simply varying the brush density.

High-Density Liquid-Crystalline Polymer Brushes Formed by Surface Segregation and Self-Assembly

2016 ◽  
Vol 128 (45) ◽  
pp. 14234-14238 ◽  
Author(s):  
Koji Mukai ◽  
Mitsuo Hara ◽  
Shusaku Nagano ◽  
Takahiro Seki
Keyword(s):  
Self Assembly ◽  
Polymer Brushes ◽  
Liquid Crystalline Polymer ◽  
Liquid Crystalline ◽  
Surface Segregation ◽  
Crystalline Polymer ◽  
High Density

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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