A Review of the Status of Polymerization in Thermotropic Liquid Crystal Media and Liquid Crystalline Monomers

Autor:	Julian F. Johnson, Edward M. Barrall
Rok vydání:	1979
Předmět:	Materials science Polymers and Plastics Mesogen Intermolecular force Thermotropic crystal Magnetic field Condensed Matter::Soft Condensed Matter Crystallography chemistry.chemical_compound Monomer Polymerization chemistry Liquid crystal Materials Chemistry Molecule
Zdroj:	Journal of Macromolecular Science, Part C: Polymer Reviews. 17:137-170
ISSN:	1520-5746 1532-1797
DOI:	10.1080/00222357908080906
Popis:	Thermotropic liquid crystals offer uniquely ordered media for intermolecular reactions such as polymerization. Unlike the recently investigated topochemical polymerizations where molecules are rigidly constrained on lattice points [l], the liquid crystalline state permits full two-dimensional (nematic and cholesteric) and one-dimensional (smectic) movement. In addition, various degrees of translational freedom are attainable depending on the class of mesogen. Such freedom of choice, plus the ability to orient nematic and cholesteric mesogens on a molecular scale in an electric or magnetic field or on certain surfaces, makes the liquid crystal state an attractive polymerization medium.
Databáze:	OpenAIRE
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