Side group functionalized liquid crystalline polymers and blends VII. Phase behaviour and elastic constants K₁ and K₃ for hydrogen bonded blends of a functionalized LC copolymer with a low molecular mass non-mesogenic dopant

A. P. Filippov Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. 31, 199004 St. Petersburg, Russia; Chemistry Department, Moscow State University, 119899, Moscow, Russia Department of Physics and Geoscience, Leipzig University, Linnestr. 5, 04103 Leipzig, Germany

V. V. Andropov Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. 31, 199004 St. Petersburg, Russia; Chemistry Department, Moscow State University, 119899, Moscow, Russia Department of Physics and Geoscience, Leipzig University, Linnestr. 5, 04103 Leipzig, Germany

E. B. Barmatov Department of Physics and Geoscience, Leipzig University, Linnestr. 5, 04103 Leipzig, Germany

F. Kremer Chemistry Department, Moscow State University, 119899, Moscow, Russia

M. V. Barmatova Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. 31, 199004 St. Petersburg, Russia; Chemistry Department, Moscow State University, 119899, Moscow, Russia Department of Physics and Geoscience, Leipzig University, Linnestr. 5, 04103 Leipzig, Germany

V. P. Shibaev Institute of Macromolecular Compounds of the Russian Academy of Sciences, Bolshoi pr. 31, 199004 St. Petersburg, Russia; Chemistry Department, Moscow State University, 119899, Moscow, Russia Department of Physics and Geoscience, Leipzig University, Linnestr. 5, 04103 Leipzig, Germany

Abstract

New hydrogen bonded blends of LC copolymers containing functional carboxyl groups with a low molecular mass pyridine-containing dopant were obtained and the orientational, optical and elastic properties of the blends were measured using the Fréedericksz method of threshold transitions in a magnetic field. The averaged order parameter S of the hydrogen bonded blends is found to be lower than that of the initial functionalized LC polymers. Furthermore, a considerable increase in the K₃/K₁ ratio is observed caused by an increment in the average 'effective' length of the hydrogen bonded mesogenic group. For the first time it is proven that LC blends with hydrogen bonded mesogenic groups obey the same main relationship of orientational elastic deformations as common nematic LC polymers with covalent bonding of mesogenic side groups.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Order Reprints Request Corporate Permissions

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

Request Academic Permissions

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.

Side group functionalized liquid crystalline polymers and blends VII. Phase behaviour and elastic constants K₁ and K₃ for hydrogen bonded blends of a functionalized LC copolymer with a low molecular mass non-mesogenic dopant

Information for

Open access

Opportunities

Help and information

Side group functionalized liquid crystalline polymers and blends VII. Phase behaviour and elastic constants K1 and K3 for hydrogen bonded blends of a functionalized LC copolymer with a low molecular mass non-mesogenic dopant

Abstract

Reprints and Corporate Permissions

Academic Permissions

Related research

To cite this article:

Download citation

Information for

Open access

Opportunities

Help and information

Keep up to date

Your download is now in progress and you may close this window

Login or register to access this feature

Side group functionalized liquid crystalline polymers and blends VII. Phase behaviour and elastic constants K₁ and K₃ for hydrogen bonded blends of a functionalized LC copolymer with a low molecular mass non-mesogenic dopant