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Electro-Optically Active Monomers: Synthesis and Characterization of Thin Films of Liquid Crystalline Substituted PolyacetylenesThe overall objective of this study was the description of the behavior of mesogen substituted acetylene monomers and polymers in monolayer films at the air/water interface and as multilayer films including the formation of such films. Fundamental knowledge to be gained would include the effect of balancing hydrophilic and hydrophobic tendencies in a molecule more complex than the classical fatty acids or lipids. The effect of molecular shape on the packing and thus the ultimate stability of monolayers formed from these new molecules was explored. The work takes on the challenge of preorienting monomers in well-ordered arrays prior to attempting polymerization with the hope that order would be preserved in any resulting polymer. New knowledge gained with regard to the acetylenic monomers includes processing of the acetylene monomer into multi-layer films, followed by the design and synthesis of a second generation of improved monomer structure for superior LBK film transfer properties. A third generation of acetylenic monomer was synthesized which approaches more closely the goal of solid state polymerization of these materials. A parallel study took a different approach. The materials are pre-formed poly(phenylene-acetylene) polymers so questions about reactivity are mute. The materials are a variation on the well-known hairy-rod polymers with regard to their Langmuir film-forming properties. Overall, the goal was to demonstrate that these polymers could be processed into NLO materials with novel polar order.
Document ID
19970041401
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Duran, R. S. (Florida Univ. Gainesville, FL United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1995
Subject Category
Nonmetallic Materials
Report/Patent Number
NASA/CR-97-206144
NAS 1.26:206144
Accession Number
97N32481
Funding Number(s)
CONTRACT_GRANT: NCC3-255
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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