Search: id:"swepub:oai:DiVA.org:liu-49842" >
Time-dependent nonl...
Time-dependent nonlinear optical properties of pyroelectric liquid crystalline polymers
-
- Örtegren, Jonas (author)
- Department of Polymer Technology, Royal Institute of Technology, Sweden
-
- Busson, Philippe (author)
- Department of Polymer Technology, Royal Institute of Technology, Sweden
-
- Gedde, Ulf W. (author)
- Department of Polymer Technology, Royal Institute of Technology, Sweden
-
show more...
-
- Hult, Anders (author)
- Department of Polymer Technology, Royal Institute of Technology, Sweden
-
- Eriksson, Anders (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
-
- Lindgren, Mikael (author)
- Linköpings universitet,Institutionen för fysik, kemi och biologi,Tekniska högskolan
-
- Arntzén, Per-Otto (author)
- National Defence Research Establishment, Linköping, Sweden
-
- Hermann, David S. (author)
- Physics Department, Chalmers University of Technology,Göteborg, Sweden
-
- Rudquist, Per (author)
- Physics Department, Chalmers University of Technology,Göteborg, Sweden
-
- Lagerwall, Sven T. (author)
- Physics Department, Chalmers University of Technology,Göteborg, Sweden
-
show less...
-
(creator_code:org_t)
- 2011-03-04
- 1999
- English.
-
In: Macromolecular Symposia. - : Wiley. - 1022-1360 .- 1521-3900. ; 148, s. 179-195
- Related links:
-
https://urn.kb.se/re...
-
show more...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- Highly oriented pyroelectric liquid-crystalline polymers were prepared by photopolymerization under the influence of a static electric field from binary mixtures of two acrylate monomers exhibiting chiral smectic C mesomorphism. Both monomers contained nitro groups to yield second order nonlinear optical properties (second harmonic generation) and one of the monomers had two functional groups to yield a crosslinked polymer. The room temperature second order nonlinear susceptibility of the polymers showed during the first two hours a 10 % decrease after which it remained constant during the next 48 days. At elevated temperatures there was a significant difference in the nonlinear optical properties over time between crosslinked and uncrosslinked polymers. The uncrosslinked polymer showed a pronounced loss of second order nonlinear optical activity with time at ≥38°C. The crosslinked polymer showed a much smaller and basically a temperature independent decrease rate in the second order nonlinear optical properties at all the ageing temperatures (23-130°C). Both the loss in mesogen order parameter, very evident for the uncrosslinked polymer, and conformational changes occurring within the mesogens (β mechanism), may account for the observations made.
Keyword
- pyroelectric liquid crystalline polymers
- second harmonic generation
- long-term properties
- NATURAL SCIENCES
- NATURVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Örtegren, Jonas
-
Busson, Philippe
-
Gedde, Ulf W.
-
Hult, Anders
-
Eriksson, Anders
-
Lindgren, Mikael
-
show more...
-
Arntzén, Per-Ott ...
-
Hermann, David S ...
-
Rudquist, Per
-
Lagerwall, Sven ...
-
show less...
- Articles in the publication
-
Macromolecular S ...
- By the university
-
Linköping University