Polymerization in the Liquid Crystalline State: Monomer-Polymer Interactions

Cser, F.; Nyitrai, K.; Hardy, G.

doi:10.1021/bk-1978-0074.ch008

Cited by 8 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…-CH2CH20-) above their smectic structure (15). Only polymers with conventional smectic, nematic, or cholesteric (N*) states may be isomorphous with small molecular compounds, which is in agreement with the experiments (9,12). Polymers with aperiodic helical structures are precipitated as new phases in the course of the polymerization.…”

Section: Introductionsupporting

confidence: 86%

Polymerization in liquid crystals. XIII. Copolymerization of mesogenic monomers

Hardy¹,

Cser²,

Nyitrai³

et al. 1982

Ind. Eng. Chem. Prod. Res. Dev.

Self Cite

View full text Add to dashboard Cite

Section: Introductionsupporting

confidence: 86%

Polymerization in liquid crystals. XIII. Copolymerization of mesogenic monomers

Hardy¹,

Cser²,

Nyitrai³

et al. 1982

Ind. Eng. Chem. Prod. Res. Dev.

Self Cite

View full text Add to dashboard Cite

“…Vol. 21, № 4 ≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡ At the same time, in the 1970's, the first works on the development of approaches for obtaining LC polymers were published by American scientists under the leadership of A. Blumstein [16][17], French researcher L. Strzelecki et al [18], and a Hungarian group of coauthors (G. Hardy, K. Nuitrai, F. Cser) [19]. Other interesting approaches to the creation of LC polymers were not even cited: see for example, the book Chemistry of Liquid Crystals and Mesomorphic Polymer Systems by Soviet scientists Y. Amerik and B. Krentsel [20].…”

Section: N Plate V Shibaev Ya Freidson H Finkelmann H Ringsdorf J Wen...mentioning

confidence: 99%

“…Other interesting approaches to the creation of LC polymers were not even cited: see for example, the book Chemistry of Liquid Crystals and Mesomorphic Polymer Systems by Soviet scientists Y. Amerik and B. Krentsel [20]. In these publications [16][17][18][19][20], the approaches are based on the unrealized idea of polymerization of monomers in organized anisotropic (i.e. LC) media that would have led to the formation of polymers with an ordered molecular and supramolecular structure.…”

Section: N Plate V Shibaev Ya Freidson H Finkelmann H Ringsdorf J Wen...mentioning

confidence: 99%

Renaissance of Liquid Crystal Polymers

Shibaev¹

2021

Liq. Cryst. and their Appl.

View full text Add to dashboard Cite

The paper consists of three interconnected parts. In the first part, the historical information about the initial works on the development of approaches for the creation of liquid crystal (LC) polymers is briefly considered. The results of the fundamental properties study of polymers carried out in the Laboratory of chemical transformations of polymers of the Chemistry Department at Moscow State University are presented. These polymers have been used as convenient matrices for creating of comb-shaped polymers by attaching mesogenic groups to their side branches (this is so-called a spacer concept). In the second part, some problems related to the priority of the original researchers worked in the field of LC polymers are analyzed in detail. The third part lists some promising areas that are developing in our LC Lab. Recent works relate to creation, study and possible application of new photo-and mechano-controlled LC polymers, di-and tri-block copolymers, as well as their composites with quantum dots for various applications in optics, optoelectronics and holography.

show abstract

Copolymerization in Liquid Crystalline Media

Hardy¹,

Cser²,

Nyitrai³

1979

Israel Journal of Chemistry

View full text Add to dashboard Cite

The data at our disposal on the copolymerization of potentially mesogenic monomers either in mesomorphic or in isotropic phases are reviewed. There are only very few convincing data concerning the effect of the mesophase on the ratio of kinetic constants of the monomer (ri = kij/kij). The p‐ethoxy‐p'‐acryloyloxy‐azobenzene (EOA) and cholesteryl acrylate (CA) gave different r values in cholesteric and in isotropic state copolymerizations (rCA,i = 0.28, rEOA,i = 0.57, rCA,m = 0.16, rEOA,m = 1.10). r values were determined in other systems consisting of p‐methyl‐p'‐acryloyloxyazoxybenzene (MAAB), phenyl‐p‐acryloyloxybenzoate (PAB), N‐acryloylpiperidine (AP), cholesterylvinylsuccinate (CUS) and cholesterylsuccinyl‐diglycoylacrylate (CSDA) as well as CA. (rCA = 0.58, rPAB = 0.62, rCA = 0.16; rAP = 1.14; rPAB = 0.16; rAP = 0.81; rCVS = 0.01, rPAB = 2.36, rCSDA = 0.20, rPAB = 1.26, rMAAB = 2.40; rCVS = 0.02). These data were obtained in isotropic phase reactions and they do not satisfy the generally accepted concepts of reactivity. The structure of the copolymers were invesitgated by X‐ray diffraction and by thermal treatment. The copolymer/comonomer state diagram for the MAAB/CVS system were also used to determine the structural features of this system. Copolymers consisting of potentially mesogenic vinyl‐monomers are macromolecules with anisotropic properties. Their transition temperatures (Tg, Tf, Ta→i) have minimal values at a given composition. The copolymers show different X‐ray Bragg periods before and after this composition. They can be regarded as anisotropic two phase systems, although they are not block copolymers. The data published in recent literature together with those obtained in our current work suggest that both the chemical and the physical structures of the copolymers built up from potentially mesogenic vinyl‐monomers are more dependent on topochemical than on pure chemical conditions.

show abstract

Polymerization in the Liquid Crystalline State: Monomer-Polymer Interactions

Cited by 8 publications

References 0 publications

Polymerization in liquid crystals. XIII. Copolymerization of mesogenic monomers

Polymerization in liquid crystals. XIII. Copolymerization of mesogenic monomers

Renaissance of Liquid Crystal Polymers

Copolymerization in Liquid Crystalline Media

Contact Info

Product

Resources

About