Chromophore Relaxation in a Side-Chain Methacrylate Copolymer Functionalized with 4-[N-Ethyl-N-(2-hydroxyethyl)]amino-2‘-chloro-4‘-nitroazobenzene

A side-chain methacrylate copolymer functionalized with the nonlinear optical chromophore 4-[N-ethyl-N-(2-hydroxyethyl)]amino-2‘-chloro-4‘-nitroazobenzene, disperse red-13, was prepared and characterized. The chromophore relaxation was investigated measuring the decay of the electrooptic coefficient...

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Published in:Macromolecules 2004-04, Vol.37 (7), p.2618-2624
Main Authors: Ribeiro, P. A, Balogh, D. T, Fonseca, José L. C, Giacometti, J. A
Format: Article
Language:English
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Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
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cited_by cdi_FETCH-LOGICAL-a257t-3aecf068978df905ee49252ec0b6bf07e72aadac6da9d5175fbdddc676395f33
cites cdi_FETCH-LOGICAL-a257t-3aecf068978df905ee49252ec0b6bf07e72aadac6da9d5175fbdddc676395f33
container_end_page 2624
container_issue 7
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container_title Macromolecules
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creator Ribeiro, P. A
Balogh, D. T
Fonseca, José L. C
Giacometti, J. A
description A side-chain methacrylate copolymer functionalized with the nonlinear optical chromophore 4-[N-ethyl-N-(2-hydroxyethyl)]amino-2‘-chloro-4‘-nitroazobenzene, disperse red-13, was prepared and characterized. The chromophore relaxation was investigated measuring the decay of the electrooptic coefficient r 13 and the complex dielectric constant at different temperatures. Results obtained below and above T g were analyzed using the Kohlrausch−Williams−Watts (KWW) equation, through the study of the temperature dependence of the KWW parameters. Above T g the relaxation time experimental data were fitted to the Williams−Landel−Ferry (WLF) equation and its parameters determined. Chromophore relaxation leading to the decrease of electrooptic properties was found associated with a primary α relaxation. The obtained WLF equation parameters were introduced into the Adam−Gibbs−Tool−Narayanaswamy−Moynihan equation, and the overall relaxation time temperature dependence was successfully obtained in terms of the fictive temperature, accounting for the sample thermal treatment and allowing optimized thermal treatment to be found. The copolymer KWW stretching parameter at the glass transition temperature lies close to the limit value for short-range interactions, i.e., 0.6, suggesting that the chromophore group is participating in primary α relaxation.
doi_str_mv 10.1021/ma035714j
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A</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Chromophore Relaxation in a Side-Chain Methacrylate Copolymer Functionalized with 4-[N-Ethyl-N-(2-hydroxyethyl)]amino-2‘-chloro-4‘-nitroazobenzene</atitle><jtitle>Macromolecules</jtitle><addtitle>Macromolecules</addtitle><date>2004-04-06</date><risdate>2004</risdate><volume>37</volume><issue>7</issue><spage>2618</spage><epage>2624</epage><pages>2618-2624</pages><issn>0024-9297</issn><eissn>1520-5835</eissn><coden>MAMOBX</coden><notes>istex:D7079FDF5D5582294C23EC40814E3BCECED0FC43</notes><notes>ark:/67375/TPS-H6LVTVDS-9</notes><abstract>A side-chain methacrylate copolymer functionalized with the nonlinear optical chromophore 4-[N-ethyl-N-(2-hydroxyethyl)]amino-2‘-chloro-4‘-nitroazobenzene, disperse red-13, was prepared and characterized. The chromophore relaxation was investigated measuring the decay of the electrooptic coefficient r 13 and the complex dielectric constant at different temperatures. 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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Applied sciences
Electrical, magnetic and optical properties
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
title Chromophore Relaxation in a Side-Chain Methacrylate Copolymer Functionalized with 4-[N-Ethyl-N-(2-hydroxyethyl)]amino-2‘-chloro-4‘-nitroazobenzene
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