Langmuir-Blodgett films of preformed polymers containing biphenyl groups.
Polymers containing liquid crystal groups have been studied previously as waveguides, and they have been deposited as spacer materials with various chromophores to form alternating films However, only a few members of this group of materials have been studied in any detail, and very little structural information has been obtained so far. Therefore, a more detailed examination of these materials as mono- and multilayers was undertaken. A new group of materials including the same mesogenic group, polymeric sulfones, was also studied. The polymers gave steep isotherms with high collapse pressures, indicating good packing of the monolayers, and could be deposited to form thick multilayers. X-ray diffraction showed that an ordered multilayer was formed, and the effects of the polymers chemical nature on the structure of the LB films are discussed. It appears that the dominant factor in monolayer structure is the nature of the polymer backbone rather than that of the liquid crystal side chains, which play a secondary role.
Davis
Frank
F
Institute of Bioscience and Technology, Cranfield University at Silsoe, Silsoe MK45 4DT, United Kingdom. f.davis@cranfield.ac.uk
Hodge
Philip
P
Tredgold
Richard H
RH
Ali-Adib
Ziad
Z
D001713:Biphenyl Compounds / Q000737:chemistry*; D050866:Liquid Crystals / Q000737:chemistry*; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D013450:Sulfones / Q000737:chemistry; D013458:Sulfur Dioxide / Q000737:chemistry; D013499:Surface Properties; D013816:Thermodynamics; D014961:X-Ray Diffraction
D001713:Biphenyl Compounds; D008567:Membranes, Artificial; D011108:Polymers; D013450:Sulfones; D013458:Sulfur Dioxide; C010574:biphenyl