Relaxation dynamics of NLO crosslinked polyurethane with hemicyanine-type chromophore

Kwang Sup Lee, Han Young Woo, Ki Jeong Moon, Hong Ku Shim, Miyun Jeong, Tong Kun Lim

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

The crosslinked polyurethane PU-W was prepared by the reaction of poly[(phenylisocyanate)-co-formaldehyde] and hydroxy-functionalized hemicyanine-type NLO chromophore. For the poled and cured polymer the χ(2) value was 30.2 pm/V measured at a wavelength of 1.064 μm. Thermal stability studies performed on PU-PV sample by the second harmonic generation activity indicated a nearly no decay of χ(2) value due to the lattice hardening of the polyurethane matrix with three bonding sites. The relaxation behaviors of aligned dipoles in PU-PV were also studied by varying poling and crosslinking conditions.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume316
DOIs
Publication statusPublished - 1998 Jan 1
Externally publishedYes
EventProceedings of the 1998 IEEE Instrumentation and Measurement Technology Conference, IMTC. Part 1 (of 2) - St.Paul, MN, USA
Duration: 1998 May 181998 May 21

Fingerprint

Polyurethanes
crosslinking
Chromophores
formaldehyde
hardening
chromophores
harmonic generations
thermal stability
dipoles
polymers
decay
Harmonic generation
matrices
Formaldehyde
wavelengths
Crosslinking
Hardening
Polymers
Thermodynamic stability
Wavelength

Keywords

  • Crosslinked polyurethane
  • Nonlinearity
  • Relaxation dynamics

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Relaxation dynamics of NLO crosslinked polyurethane with hemicyanine-type chromophore. / Lee, Kwang Sup; Woo, Han Young; Moon, Ki Jeong; Shim, Hong Ku; Jeong, Miyun; Lim, Tong Kun.

In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 316, 01.01.1998, p. 47-52.

Research output: Contribution to journalConference article

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N2 - The crosslinked polyurethane PU-W was prepared by the reaction of poly[(phenylisocyanate)-co-formaldehyde] and hydroxy-functionalized hemicyanine-type NLO chromophore. For the poled and cured polymer the χ(2) value was 30.2 pm/V measured at a wavelength of 1.064 μm. Thermal stability studies performed on PU-PV sample by the second harmonic generation activity indicated a nearly no decay of χ(2) value due to the lattice hardening of the polyurethane matrix with three bonding sites. The relaxation behaviors of aligned dipoles in PU-PV were also studied by varying poling and crosslinking conditions.

AB - The crosslinked polyurethane PU-W was prepared by the reaction of poly[(phenylisocyanate)-co-formaldehyde] and hydroxy-functionalized hemicyanine-type NLO chromophore. For the poled and cured polymer the χ(2) value was 30.2 pm/V measured at a wavelength of 1.064 μm. Thermal stability studies performed on PU-PV sample by the second harmonic generation activity indicated a nearly no decay of χ(2) value due to the lattice hardening of the polyurethane matrix with three bonding sites. The relaxation behaviors of aligned dipoles in PU-PV were also studied by varying poling and crosslinking conditions.

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