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Browse Prior Art Database

Thermally Stable Guest Host Polymer Systems for Nonlinear Optical Applications

IP.com Disclosure Number: IPCOM000109912D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 1 page(s) / 51K

Publishing Venue

IBM

Related People

Burland, DM: AUTHOR [+6]

Abstract

Guest-host polymer systems with potential use in electro-optic devices have been investigated. The polymer host is a polyimide and the guest chromophores are 2,4,5-triarylimidazoles (lophines) and 2,4,5 triaryloxazoles. The choice between fully imidized and polyimide precursor systems is largely determined by the solubility characteristics desired of a host polymer system. The use of polyimide precursors might have additional benefits because of specific chemical or physical interactions between the polymer host and the guest NLO chromophore that increases the solubility of the chromophore guest. An example of this type of behavior has been observed for poly(amic acids) and NLO chromophores that are basic in nature, e.g. imidazoles.

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Thermally Stable Guest Host Polymer Systems for Nonlinear Optical Applications

      Guest-host polymer systems with potential use in electro-optic
devices have been investigated.  The polymer host is a polyimide and
the guest chromophores are 2,4,5-triarylimidazoles (lophines) and
2,4,5 triaryloxazoles.  The choice between fully imidized and
polyimide precursor systems is largely determined by the solubility
characteristics desired of a host polymer system.  The use of
polyimide precursors might have additional benefits because of
specific chemical or physical interactions between the polymer host
and the guest NLO chromophore that increases the solubility of the
chromophore guest.  An example of this type of behavior has been
observed for poly(amic acids) and NLO chromophores that are basic in
nature, e.g. imidazoles.  Alternative precursors, such as
amide-esters and amide-amides, are known to imidize at temperatures
significantly higher than the corresponding poly(amic acids),
allowing for more efficient solvent removal prior to electric field
poling and imidization.  Isoimides possess unique properties that
might make them particularly useful as host polymers.  Isoimides are
generally more soluble than the corresponding imides and thermally
rearrange to imides without the evolution of volatiles.  Alternative
polymer structures include poly(aryl ethers) such as polysulfone,
poly(phenylene oxide), poly(ether ketone) and related structures.
Poling stabilities h...