Side-chain functionalized liquid crystalline polymers and blends, 4. Phase behavior of functionalized liquid crystalline copolymers containing maleic acid fragments

Dielectric and IR Spectroscopy of the Macromolecular Reaction of Anhydridization in a Functionalized Side-Chain Liquid Crystalline Copolymer Containing Acrylic Acid Groups

“…At present, very few publications studying the anhydrization in the functionalized side-chain LC polymers are available. [5][6][7][8] In the present work FTIR and dielectric spectroscopy were used as principal investigation methods. They allow studying of both the character of the molecular transformations of the acid fragment of the functionalized LC copolymer and the effect of the anhydride structures on processes related to the molecular mobility and the relaxation of the mesogenic groups in the different phase states of the system (the glassy state, the LC phase, and the isotropic melt).…”

“…An approach to the preparation of a new class of polymer liquid crystalline materials, the so-called functionalized LC polymers, has been proposed. − These compounds are random copolymers of two monomers. One of the monomers is mesogenic and favors LC phase formation.…”

“…One of the monomers is mesogenic and favors LC phase formation. The other monomer is functional and contains carboxylic groups (acrylic, − maleic, benzoic acids 1,2,9-13 ) capable of forming hydrogen bonds. The presence of carboxylic groups in the functionalized LC polymers offers the possibility to control the properties of the macromolecules simply by changing the ratio of acid to mesogenic fragments.…”

“…Second, it was important to determine the effect of the anhydride structures on the ability of mesogenic groups to form LC state as well as to investigate the dynamics of the relaxation processes. At present, very few publications studying the anhydrization in the functionalized side-chain LC polymers are available. − …”