دورية أكاديمية
Preparation and properties of semi-alicyclic colorless polyimide films and light-colored sheets with low dielectric features for potential applications in optoelectronic integrated circuits
| العنوان: | Preparation and properties of semi-alicyclic colorless polyimide films and light-colored sheets with low dielectric features for potential applications in optoelectronic integrated circuits |
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| المؤلفون: | X. X. Zhi, Y. Zhang, X. M. Zhang, H. L. Wang, L. Wu, Y. C. An, X. Y. Wei, J. G. Liu |
| المصدر: | eXPRESS Polymer Letters, Vol 15, Iss 11, Pp 1051-1062 (2021) |
| بيانات النشر: | Budapest University of Technology, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials LCC:Chemical technology |
| مصطلحات موضوعية: | tailor made polymers, semi-alicyclic polyimide, low dielectric constant, low dissipation factors, thermal properties, Materials of engineering and construction. Mechanics of materials, TA401-492, Chemical technology, TP1-1185 |
| الوصف: | Colorless and transparent polymer films and sheets with good high-temperature resistance and low dielectric constant (low-Dk) and low dissipation factors (low-Df) features are highly desired in advanced optoelectronic integrated circuits (OEIC) fabrications. In the current work, a series of semi-alicyclic polyimide (PI) powders were first prepared by the onestep high-temperature polycondensation of an alicyclic dianhydride, hydrogenated 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (HBPDA) and aromatic diamines which were beneficial for endowing the derived PI films with low-Dk features, including 2,2-bis[4-(4-aminophenoxy)phenyl]propane (BAPP) for PI-1, 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (BDAF) for PI-2, and 9,9-bis[4-(4-aminophenoxy)phenyl]fluorene (BAOFL) for PI-3. Then, the derived PI powders were fabricated into colorless films and light-colored sheets, respectively. The freestanding flexible and tough PI films showed excellent optical transparency with the ultraviolet (UV) cutoff wavelength (λcut) lower than 300 nm, the optical transmittance higher than 85% at the wavelength of 400 nm, yellow indices (b*) lower than 1.0, and haze values lower than 1.2%. The hot-processed PI sheets also exhibited light colors. The PI films and sheets showed good thermal stability with the glass transition temperatures (Tg) higher than 220 °C. More importantly, the derived semi-alicyclic PI sheets showed Dk and Df values as low as 2.56 and 0.008 at 1 MHz, respectively. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1788-618X |
| Relation: | http://www.expresspolymlett.com/letolt.php?file=EPL-0011484&mi=cd; https://doaj.org/toc/1788-618X |
| DOI: | 10.3144/expresspolymlett.2021.85 |
| URL الوصول: | https://doaj.org/article/ef21a106557b4b9dbf68e026297e63a9 |
| رقم الأكسشن: | edsdoj.f21a106557b4b9dbf68e026297e63a9 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 1788618X |
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| DOI: | 10.3144/expresspolymlett.2021.85 |