Nonlinear dielectric response of poled amorphous polymer dipole glasses

Bauer, Siegfried; Bauer‐Gogonea, S.; Ploss, B.

doi:10.1016/j.jnoncrysol.2005.03.068

Cited by 15 publications

(10 citation statements)

References 15 publications

(27 reference statements)

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“…15 TU/SMA films were prepared by dip coating onto polished aluminum wafers ͑Valley Design Corp, USA͒. SMA shows micro-Brownian dipole dynamics under applied electric fields when blended/grafted with strong chromophore molecular dipoles.…”

Section: Radio Frequency Functional Capacitors Made Of All-organic Comentioning

confidence: 99%

Radio frequency functional capacitors made of all-organic composites of thiourea in field-responsive polymers

Bayer

Biswas

Szczech

et al. 2008

Applied Physics Letters

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High-frequency magnetic and dielectric properties of a three-phase composite of nickel, Co 2 Z ferrite, and polymer J. Appl. Phys. 99, 123909 (2006); 10.1063/1.2206704 Rescaled temperature dependence of dielectric behavior of ferroelectric polymer composites Appl. Phys. Lett. 86, 172905 (2005); 10.1063/1.1920408Large high-frequency magnetoelectric response in laminated composites of piezoelectric ceramics, rare-earth iron alloys and polymer

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Section: Radio Frequency Functional Capacitors Made Of All-organic Comentioning

confidence: 99%

Radio frequency functional capacitors made of all-organic composites of thiourea in field-responsive polymers

Bayer

Biswas

Szczech

et al. 2008

Applied Physics Letters

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“…10 Initially a polymer containing DR1 was thought to be attractive for other work in our lab as a reference material because of the wealth of data available, if the drawbacks can be addressed. By integrating the dipole, either as a sidechain or into the backbone of the host-polymer, the performance of electro-optical polymers can be increased drastically, 6,12 such as is the case when DR1 is integrated into PMMA as a sidechain to give the copolymer DR1-co-MMA seen in Figure 1. These copolymers are commercially available at selected dipole contents and can easily be synthesized to incorporate any concentration of dipole using a DR1 molecule modified with a methacrylate group (DR1MA), also shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependent impedance spectroscopy and Thermally Stimulated Depolarization Current (TSDC) analysis of disperse red 1-co-poly(methyl methacrylate) copolymers

Cuervo‐Reyes

Nüesch

et al. 2016

SPIE Proceedings

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The dielectric relaxation processes of polymethyl methacrylates that have been functionalized with Disperse Red 1 (DR1) in the side chain (DR1-co-MMA) were studied with temperature dependent impedance spectroscopy and thermally stimulated depolarization current (TSDC) techniques. Copolymers with dipole contents which varied between 10 mol% and 70 mol% were prepared. All samples showed dipole relaxations above the structural-glass transition temperature (T g ). The β-relaxation of the methyl methacrylate (MMA) repeating unit was most visible in DR1(10%)-co-MMA and rapidly vanishes with higher dipole contents. DSC data reveal an increase of the T g by 20 °C to 125°C with the inclusion of the dipole into the polymethyl methacrylate (PMMA) as side chain. The impedance data of samples with several DR1 concentrations, taken at several temperatures above T g , have been fitted with the Havriliak-Negami (HN) function. In all cases, the fits reveal a dielectric response that corresponds to power-law dipolar relaxations. TSDC measurements show that the copolymer can be poled, and that the induced polarization can be frozen by lowering the temperature well below the glass transition. Relaxation strengths Δε estimated by integrating the depolarization current are similar to those obtained from the impedance data, confirming the efficient freezing of the dipoles in the structuralglass state.

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“…The search of molecules with high nonlinear optical susceptibilities for synthesis of NLO polymer materials still continues [1][2][3][4]. The azo compounds, which contain strong chromophore system-azo groups coupling with aromatic heterocyclic rings-are well known from their large optical response [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Relationship between structure and nonlinear optical properties of new bisazo chromophores. Theoretical and experimental study

Zadrożna

Kaczorowska

2007

Struct Chem

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Two new bisazo chromophores-derivatives of bis-2,2-(4-hydroxyphenyl)propane (bisphenol A), heterocyclic amines (2-aminobenzothiazole, and 2-amino-6-nitrobenzothiazole) and aniline-were synthesized. Nonlinear optical properties of these chromophores were studied by solvatochromic method (obtained compounds have b CT value *10 -29 esu). Dependence among the structure of molecules, their dipole moments, and first hyperpolarizabilities was considered on the basis of semi-empirical calculations. A correlation between the measured and calculated b values was studied. The NLO chromophores were used as special monomers to synthesize copolyarylates. The basic characterization of obtained polymers was carried out.

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Nonlinear dielectric response of poled amorphous polymer dipole glasses

Cited by 15 publications

References 15 publications

Radio frequency functional capacitors made of all-organic composites of thiourea in field-responsive polymers

Radio frequency functional capacitors made of all-organic composites of thiourea in field-responsive polymers

Temperature dependent impedance spectroscopy and Thermally Stimulated Depolarization Current (TSDC) analysis of disperse red 1-co-poly(methyl methacrylate) copolymers

Relationship between structure and nonlinear optical properties of new bisazo chromophores. Theoretical and experimental study

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