Polyimide foams with ultralow dielectric constants

Polyimide foams with ultralow dielectric constants

To explore ultralow dielectric constant polyimide, the crosslinked polyimide foams (PIFs) were prepared from 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA), 4,4′‐oxydianiline (ODA), and 2,4,6‐triaminopyrimidine (TAP) via a poly(ester–amine salt) (PEAS) process. FTIR measurements indicated...

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Veröffentlicht in:Journal of applied polymer science 2006-10, Vol.102 (2), p.1734-1740
Hauptverfasser: Chu, Hui-Juan, Zhu, Bao-Ku, Xu, You-Yi
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Sprache:eng
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Applied sciences
Cellular
dielectric property
Exact sciences and technology
foam
Forms of application and semi-finished materials
poly(ester-amine salt)
polyimide
Polymer industry, paints, wood
Technology of polymers
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container_title Journal of applied polymer science
container_volume 102
creator Chu, Hui-Juan
Zhu, Bao-Ku
Xu, You-Yi
description To explore ultralow dielectric constant polyimide, the crosslinked polyimide foams (PIFs) were prepared from 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride (BTDA), 4,4′‐oxydianiline (ODA), and 2,4,6‐triaminopyrimidine (TAP) via a poly(ester–amine salt) (PEAS) process. FTIR measurements indicated that TAP did not yield a negative effect on imidization of PEAS precursors. SEM measurement revealed the homogeneous cell structure. Through using TAP as a crosslinking monomer, the mechanical properties of PIFs could be improved in comparison with uncrosslinked BTDA/ODA based PIF. The crosslinked PIFs still exhibited excellent thermal stability with 5% weight loss temperatures higher than 520°C. In the field with frequency higher than 100 Hz, the dielectric constants of the obtained PIFs ranged from 1.77 to 2.4, and the dielectric losses were smaller than 3 × 10−2 at 25–150°C. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1734–1740, 2006
doi_str_mv 10.1002/app.24364
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FTIR measurements indicated that TAP did not yield a negative effect on imidization of PEAS precursors. SEM measurement revealed the homogeneous cell structure. Through using TAP as a crosslinking monomer, the mechanical properties of PIFs could be improved in comparison with uncrosslinked BTDA/ODA based PIF. The crosslinked PIFs still exhibited excellent thermal stability with 5% weight loss temperatures higher than 520°C. In the field with frequency higher than 100 Hz, the dielectric constants of the obtained PIFs ranged from 1.77 to 2.4, and the dielectric losses were smaller than 3 × 10−2 at 25–150°C. © 2006 Wiley Periodicals, Inc. 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In the field with frequency higher than 100 Hz, the dielectric constants of the obtained PIFs ranged from 1.77 to 2.4, and the dielectric losses were smaller than 3 × 10−2 at 25–150°C. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1734–1740, 2006</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><doi>10.1002/app.24364</doi><tpages>7</tpages></addata></record>
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subjects Applied sciences
Cellular
dielectric property
Exact sciences and technology
foam
Forms of application and semi-finished materials
poly(ester-amine salt)
polyimide
Polymer industry, paints, wood
Technology of polymers
title Polyimide foams with ultralow dielectric constants
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