Mesogen-jacketed liquid crystalline polymers: from molecular design to polymer light-emitting diode applications

2012 ◽  
Vol 3 (8) ◽  
pp. 1947 ◽  
Author(s):  
Longcheng Gao ◽  
Zhihao Shen ◽  
Xinghe Fan ◽  
Qifeng Zhou
Keyword(s):  
Liquid Crystalline ◽  
Molecular Design ◽  
Light Emitting Diode ◽  
Liquid Crystalline Polymers ◽  
Light Emitting ◽  
Crystalline Polymers ◽  
Polymer Light Emitting Diode

Development of light-emitting liquid-crystalline polymers with a pentafluorinated bistolane-based luminophore

2020 ◽  
Vol 44 (15) ◽  
pp. 5684-5691 ◽  
Author(s):  
Shigeyuki Yamada ◽  
Akira Mitsuda ◽  
Kaoru Adachi ◽  
Mitsuo Hara ◽  
Tsutomu Konno
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Liquid Crystalline ◽  
Dynamic Change ◽  
Liquid Crystalline Polymers ◽  
Light Emitting ◽  
Light Blue ◽  
Crystalline Polymers ◽  
Thermal Phase Transition ◽  
Thermal Phase

Light-emitting liquid-crystalline polymers showing PL in the pristine solid state can control their PL color from blue to light-blue via a thermal phase transition to LC phases, which originates from a dynamic change of aggregated structures.

Liquid Crystalline Polymers

MRS Bulletin ◽  
1987 ◽  
Vol 12 (8) ◽  
pp. 18-21 ◽  
Author(s):  
Alan Windle
Keyword(s):  
Long Range ◽  
Liquid Crystalline ◽  
Molecular Design ◽  
Orientational Order ◽  
Polymer Melt ◽  
Liquid Crystalline Polymers ◽  
Downstream Processing ◽  
Major Theme ◽  
Polymer Science ◽  
Crystalline Polymers

Not much more than a decade ago, the plastics industry viewed itself as a mature branch of the heavy chemical industry. Its raison d'être was the mass production of four or five main-line polymers, and profits were equated to tonnage output, plant efficiency, and clever downstream processing such as film blowing. The chemistry was essentially simple and the monomer, of course, cheap. There was, however, a spark of new thinking. A trend was developing toward the design and manufacture of more complex, more expensive polymers, with special properties which could command a special price. Such products would sell advanced scientific know-how, not just engineering expertise which could all too easily be exported to the major oil producers in the form of a polymer plant.Designing particular molecules to achieve desired properties is now a major theme of polymer producers. There is a move toward increasing the aromatic content of polymer backbones to achieve greater levels of chemical and thermal stability, while the development of new cross-linking systems remains as chemically intensive as ever. It is, however, the introduction of liquid crystalline polymers which, above all, has exploited the principles of molecular design, while at the same time challenging our understanding in a new area of polymer science.A polymer is “liquid crystalline” where the chains are sufficiently rigid to remain mutually aligned in the liquid phase although the perfect positional periodicity of a crystal is no longer present. In other words there is a long-range orientational order without long-range positional order (Figure 1). Structurally, therefore, the phase is intermediate between a crystal and a liquid leading to the use of the term mesophase. Where the liquid crystalline phase forms on melting the polymer, it is known as thermotropic, but where it is achieved by solvent addition it is called Inotropic. Increasing temperature, or solvent concentration, will eventually lead to the reversion of the liquid crystal phase to the normal isotropic polymer melt.

Polarized electroluminescence of light emitting liquid crystalline polymers

1996 ◽  
Vol 21 (6) ◽  
pp. 903-907 ◽  
Author(s):  
G. Lüssem ◽  
F. Geffarth ◽  
A. Greiner ◽  
W. Heitz ◽  
M. Hopmeier ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Light Emitting ◽  
Crystalline Polymers
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