Thermally Reversible Phase Separation of Poly(vinyl acetate)-Quaternary Salts Hybrid Films and Their Application for Rewritable Displays

Ichikawa, Ryoji; Watanabe, Daiki; Hoshi, Zenzo; Nakano, Hideyuki

doi:10.1295/koron.71.475

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…By the way, we have been reported that the binary films composed of quaternary ammonium and phosphonium salts together with poly(vinyl acetate) (PVAc) exhibited thermally reversible phase separation-dissolution behaviors and the states at room temperature were controllable by thermal histories [13].…”

Section: Introductionmentioning

confidence: 99%

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Emitting Behaviors of 1-Acetylaminopyrene Dispersed in Poly(vinyl acetate) Film

Takahashi

Nakano

2018

J. Photopol. Sci. Technol.

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In order to create a new stimuli-responsible emitting system, we have investigated the thermal phase behaviors and emitting properties of the film of 1-acetylaminopyrene (AAPy) dispersed in poly(vinyl acetate) (PVAc). By heating the amorphous film obtained by spincoating method, crystallization took place at ca. 130 °C followed by melting and/or resolution to recover the homogeneous film over 200 °C. Both crystalline and amorphous phases could be reversibly obtained at room temperature by annealing the film at 130 °C and 245 °C, respectively. Such phase transition to control the state of the film at room temperature allowed the reversible fluorescence color change of the film due to the difference of emission spectra between amorphous and crystalline phases.

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Section: Introductionmentioning

confidence: 99%

“…In addition, reversible display switching and fluorescence modulation were demonstrated by controlling the states of the films by thermal treatments [13].…”

Section: Introductionmentioning

confidence: 99%

Emitting Behaviors of 1-Acetylaminopyrene Dispersed in Poly(vinyl acetate) Film

Takahashi

Nakano

2018

J. Photopol. Sci. Technol.

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“…We have also found that hybrid films of azobenzenebased photochromic amorphous molecular materials and poly(vinyl acetate) (PVAc) exhibited thermally reversible phase-separation-dissolution transitions and that the structure of domains produced in the phase-separated film could be deformed by irradiation with polarized laser beam [7]. In addition, we have reported that hybrid films of PVAc and quaternary ammonium and phosphonium salts exhibited thermally reversible phase-separation and dissolution transitions and that the fluorescence emission intensity of pyrenedoped hybrid film of PVAc and tetrabutylphosphonium tetrafluoroborate (TBPBF 4 ) could be modulated by the phase-separation and dissolution transitions [8].…”

Section: Introductionmentioning

confidence: 99%

Emission Modulation of Poly(vinyl acetate)-Tetrabutylphosphonium Tetrafluoroborate Hybrid Film Doped with 4-[Bis(4-methylphenyl)amino]-benzaldehyde

Ogura

Hoshi

Nagata

et al. 2015

J. Photopol. Sci. Technol.

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A hybrid film of poly(vinyl acetate) and tetrabutylphosphonium tetrafluoroborate together with 4-[bis(4-methylphenyl)amino]benzaldehyde as a fluorescent dopant was fabricated. It was found that the film exhibited thermally reversible phase-separation and dissolution transitions and that both homogeneous and phase-separated states could be obtained at room temperature by appropriate thermal treatments. In addition, emission modulation of the film was achieved by using the phase-separation-dissolution transitions. Fluorescence properties including fluorescence life times and quantum yields in homogeneous film seemed to be unchanged by phase separation, suggesting that no significant change in the surrounding environment of the dopant molecules took place by phase-separationdissolution cycles. Therefore, the emission modulation observed here was suggested to be due to mainly the change in the light-scattering effect caused by phase transitions.

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Thermally Reversible Phase Separation of Poly(vinyl acetate)-Quaternary Salts Hybrid Films and Their Application for Rewritable Displays

Cited by 2 publications

References 7 publications

Emitting Behaviors of 1-Acetylaminopyrene Dispersed in Poly(vinyl acetate) Film

Emitting Behaviors of 1-Acetylaminopyrene Dispersed in Poly(vinyl acetate) Film

Emission Modulation of Poly(vinyl acetate)-Tetrabutylphosphonium Tetrafluoroborate Hybrid Film Doped with 4-[Bis(4-methylphenyl)amino]-benzaldehyde

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