2016
DOI: 10.1002/app.44375
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Effect of fluorination on haze reduction in transparent polyimide films for flexible substrates

Abstract: High transmittance is an important parameter for polyimide (PI) films used as flexible display substrates. However, thermal treatment during film fabrication can cause an undesired phenomenon affecting color change in the films, which is called haze. Until now, haze formation in PI films has remained mostly unexplored, suggesting that originates in the composition. In this work, the effect of fluorination on haze reduction was investigated. Both experiments and density functional theory calculations suggest th… Show more

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Cited by 15 publications
(11 citation statements)
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“…Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectra of the SPI ALs were recorded on a Iraffinity-1S FT-IR spectrometer (Shimadzu, Kyoto, Japan). Nuclear magnetic resonances ( 1 H-NMR) were performed on an AV 400 spectrometer (Ettlingen, Germany) operating at 400 MHz in DMSO-d 6 . Ultraviolet-visible (UV-Vis) spectra were recorded on a Hitachi U-3210 spectrophotometer (Tokyo, Japan) at room temperature.…”
Section: Characterization Methodsmentioning
confidence: 99%
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“…Attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectra of the SPI ALs were recorded on a Iraffinity-1S FT-IR spectrometer (Shimadzu, Kyoto, Japan). Nuclear magnetic resonances ( 1 H-NMR) were performed on an AV 400 spectrometer (Ettlingen, Germany) operating at 400 MHz in DMSO-d 6 . Ultraviolet-visible (UV-Vis) spectra were recorded on a Hitachi U-3210 spectrophotometer (Tokyo, Japan) at room temperature.…”
Section: Characterization Methodsmentioning
confidence: 99%
“…The structural factors that can improve the thermal stability of polymer films often reduce the optical properties of the films at the same time, and vice versa. Thus, it is a changeling research topic to develop polymer optical films with both of excellent thermal stability and good optical transparency [5][6][7].In recent years, the research progress of colorless and transparent polyimide (CPI) films has attracted great attention in the research and development of high performance polymer optical films [8][9][10]. Based on the previous decades of research on the origination of coloration in traditional all-aromatic PI films, the researchers revealed many effective procedures to prohibit the formation of intra-or intermolecular charge transfer complexes (CTC) between the electron-donating diamine moiety and the electron-accepting dianhydride moiety so as to improve the optical transparency of the PI films [11][12][13].…”
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confidence: 99%
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“…The POM bars should also be extruded very slowly without pulling and depending only on the pressure of the head part of the extruder, and must be shaped in an oil bath of 125-135 C. Most importantly, due to the high crystallinity with coarse crystalline grains, the POM articles are very brittle. [3,8] Therefore, the crystallization behavior, including crystallization kinetics [2,[10][11][12][13][14][15][16][17][18][19][20][21][22] and nucleation, [23][24][25][26] as well as the toughness [3,[27][28][29][30][31][32][33][34][35][36][37][38] of POM, have always been its main research fields.…”
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confidence: 99%