Optically transparent aromatic poly(ester imide)s with low coefficients of thermal expansion (1). Self-orientation behavior during solution casting process and substituent effect

Hasegawa, Masatoshi; Ishigami, Tomohiro; Ishii, Junichi

doi:10.1016/j.polymer.2015.07.026

Cited by 54 publications

(67 citation statements)

References 35 publications

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“…Our previous studies revealed that PI films prepared by CI and successive solution casting often show more desirable properties for our purpose (i.e. lower CTE and higher transparency) than their thermally imidized counterparts . Therefore, CI process compatibility may be the key factor in attaining the desired goal.…”

Section: Resultsmentioning

confidence: 99%

“…) likely contributes to the resultant higher transparency of the PI films (C). A strong trend of the lower CTE generation by application of the CI process is based on a more prominent in‐plane orientation phenomenon during solution casting, which seems to be influenced by the balance between main‐chain linearity/rigidity and molecular mobility in the film formation process …”

Section: Resultsmentioning

confidence: 99%

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Solution‐processable colorless polyimides with ultralow coefficients of thermal expansion for optoelectronic applications

Hasegawa

Watanabe

Tsukuda

et al. 2016

Polymer International

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Solution‐processable colorless polyimides with ultralow coefficients of thermal expansion for optoelectronic applications

Hasegawa

Watanabe

Tsukuda

et al. 2016

Polymer International

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“…Hasegawa and coworkers designed and synthesized various ester‐linked tetracarboxylic dianhydrides (TA‐X) from various alkyl substituted hydroquinone analogs (HQs) and TMAC ( Scheme ) . Solution casting of TA‐X based PEsIs from the cyclopentanone solution resulted flexible, less colored film (λ 0 in the range of 354–433 nm, T 400 % as low as 72%) with a considerably low CTE (11.5 ppm K −1 ), a high T g of 276 °C (by TMA).…”

Section: Recent Design Approaches To Prepare Cpismentioning

confidence: 99%

Section: Recent Design Approaches To Prepare Cpismentioning

confidence: 99%

“…For example, copolymerization of NTDA (2,3,6,7‐naphthalenetetracarboxylic dianhydride) (30 mol%) to TA‐25DBHQ/TFMB caused not only a drastic decrease in the CTE (7.4 ppm K −1 ) but also an enhancement of the T g (290 °C) while keeping good transparency and excellent solution‐processability. This approach was also very effective to restrain the film yellowness . Colorless, flexible, and tough PAI film was obtained by copolymerizing N , N′ ‐[2,2 ′ ‐bis(trifluoromethyl)‐4,4 ′ ‐biphenyleneibis(4‐aminobenzamide) (TFAB) with 6FDA, and 4,4 ′ ‐biphthalic anhydride (BPA) from PAA through solution‐casting using chemical and thermal imidization methods .…”

Section: Recent Design Approaches To Prepare Cpismentioning

confidence: 99%

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Recent Trends on Transparent Colorless Polyimides with Balanced Thermal and Optical Properties: Design and Synthesis

Tapaswi

2019

Macro Chemistry & Physics

164

155

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Recently, colorless and transparent plastic substrates with high glass transition temperature and suitable thermo‐mechanical properties are in high demand in optoelectronic device industries, due to their various optical applications. Colorless polyimides (CPIs) exhibit both high thermo‐mechanical stability as well as high transparency that are suitable for optoelectronic applications. The most recent (2010–2018) developments on CPIs, in terms of design and synthesis of new monomers and their effects on the thermo‐optical properties of the obtained CPIs, are reviewed in this article.

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Synthetic strategies for highly transparent and colorless polyimide film

Liu

Wang

2022

J of Applied Polymer Sci

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Polyimide (PI) is one of the best engineering plastics with excellent thermal, mechanical, dielectric performance and chemical stability. Among various PI products, film is one of the most dominant types. If PI films are to be applied to optical devices and display equipment, it is necessary to improve their optical transparency in the ultraviolet–visible region. However, improving the optical transparency of PI films would affect their thermal performance including thermal and dimensional stability. Therefore, how to balance optical and thermal performance to obtain highly transparent PI films with the best overall performance becomes a focus of current research field. In this review, we categorize transparent PI films into highly transparent PI, transparent PI with high glass transition temperature (Tg) and transparent PI with low coefficient of thermal expansion (CTE) based on their optical and thermal properties. Then, we review research progress in the field of polymer molecular design including synthesis strategies and properties in recent 5 years, to inspire research ideas and elaborate on the possible ways to develop high‐performance, colorless and transparent PI materials.

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Optically transparent aromatic poly(ester imide)s with low coefficients of thermal expansion (1). Self-orientation behavior during solution casting process and substituent effect

Cited by 54 publications

References 35 publications

Solution‐processable colorless polyimides with ultralow coefficients of thermal expansion for optoelectronic applications

Solution‐processable colorless polyimides with ultralow coefficients of thermal expansion for optoelectronic applications

Recent Trends on Transparent Colorless Polyimides with Balanced Thermal and Optical Properties: Design and Synthesis

Synthetic strategies for highly transparent and colorless polyimide film

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