Towards colorless polyimide/silica hybrids for flexible substrates

Bae, Woo Jin; Kovalev, Mikhail K.; Kalinina, F. E.; Kim, Minsang; Cho, Chungkun

doi:10.1016/j.polymer.2016.10.023

Cited by 77 publications

(48 citation statements)

References 43 publications

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“…It is confirmed that the presence of alkyl pendent groups in the polyimides cause the deterioration of thermal properties but bulky or long aryl side chains can retain those good heat resistant properties . As the percentage of nanofiller increases decomposition temperature increases because of the high thermal stability imparted by the silica which also acts as the heat sink absorbing heat there by inhibiting the decomposition .…”

Section: Resultsmentioning

confidence: 92%

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

et al. 2018

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A new diamine monomer having ether and azomethine linkages in the long pendent group was synthesized. New polyimide was prepared by reacting the new diamine with BTDA and nanocomposites were prepared with silicon dioxide as nanofiller. SEM analysis shows a uniform distribution of the nanopowder in the polyimide matrix. TGA shows that the polyimide and nanocomposites have good thermal stability with the T10% values varying between 440 and 458°C. DSC analysis shows Tg values between 210 and 230°C. The neat polyimide shows high elongation at break and stretchability (260%) but low tensile strength. The nanocomposites of polyimide show lower elongation at break but have improved tensile strength. The chemically imidised polyimide shows good solubility in solvents like N, N‐dimethyl formamide, N, N‐dimethyl acetamide, and N‐methyl 2‐pyrrollidone. POLYM. COMPOS., 40:832–843, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 92%

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

et al. 2018

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“…When light goes through the GFRHybrimer, the light passes through the hybrimer matrix and the glass-fabric. If the refractive index of the hybrimer matrix is different from the refractive index of the glass-fabric, light is scattered at hybrimer/glass interfaces [9,15]. On the other hand, if the refractive index of the hybrimer matrix is matched with the one of the glass-fabric, refraction or reflection at the interface does not occur, making film transparent.…”

Section: Resultsmentioning

confidence: 99%

“…Among the synthetic plastic films, polyimide (PI) film satisfies the above criteria of flexible substrate materials [8]. However, the inherent yellowness and high birefringence of the PI film limit its usage as a substrate film in many applications such as flexible transparent displays [9]. Therefore, many types of research on colorless polyimide (CPI) film have been done to overcome these negative characteristics of PI film [10].…”

Section: Introductionmentioning

confidence: 99%

12‐4: Composition Optimization of Transparent Glass‐fabric Reinforced Siloxane Hybrid (GFRHybrimer) Films for Thermally Stable Flexible Display Substrate Film

Lim

Lee

Kim

et al. 2017

Symp Digest of Tech Papers

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Composition of siloxane hybrid material (hybrimer) was optimized to fabricate glass-fabric reinforced siloxane hybrid (GFRHybrimer) with high transparency and thermal stability. Refractive index of the hybrimer was precisely controlled by changing the phenyl precursor and adding a low refractive index crosslinker monomer. By measuring the thermal stability of GFRHybrimer films fabricated with a refractive index matched using cycloaliphatic epoxy oligosiloxane (CAEO), we obtained an optimal CAEO composition. The optimized GFRHybrimer film showed a high transparency (90%) and good thermal stability (1% weight loss temperature of 365 o C). Also, the fabricated GFRhybrimer film showed a smooth surface (R rms = 0.265 nm), low coefficient of thermal expansion (~14 ppm/ o C), and high elastic modulus (7 GPa).

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“…Organic polymer/silica hybrids often increase thermal stability, surface planarity and optical transparency as compared with the corresponding organic polymers [12][13][14]. In our previous work, PI-silicone copolymer afforded negative-tone pattern by RDP using tetramethylammonium hydroxide/water/NMP/methanol as developer [15].…”

Section: Introductionmentioning

confidence: 99%

Formation of Fine Pattern from Polyarylate-Silicone Copolymer by the Application of Reaction Development Patterning

Tokoro

Miyoshi

Ōyama

2017

J. Photopol. Sci. Technol.

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Multi-block copolymers between polyester (polyarylate) and polydimethylsiloxane were prepared by polycondensation using polydimethylsiloxane having p-hydroxyphenyl groups at its both chain ends as a diol monomer. The copolymer gave positive-tone fine pattern by the reaction development patterning with developer containing ethanolamine as a nucleophile. The silicone unit hybridized with polyarylate enabled pattern formation from dry film by contributing not only to high photosensitivity but also to high dissolution rate at the photoirradiated area. Use of polyarylate instead of the copolymer resulted in unsuccessful pattern formation from dry film.

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Towards colorless polyimide/silica hybrids for flexible substrates

Cited by 77 publications

References 43 publications

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

Synthesis and characterization of flexible/stretchable polyimide having long/bulky aryl pendent group and polyimide/silicon dioxide nanocomposites.

12‐4: Composition Optimization of Transparent Glass‐fabric Reinforced Siloxane Hybrid (GFRHybrimer) Films for Thermally Stable Flexible Display Substrate Film

Formation of Fine Pattern from Polyarylate-Silicone Copolymer by the Application of Reaction Development Patterning

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