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Synthesis and Properties of Designed Low‐ k Fluoro‐Copolyetherimides. Part 1
Author(s) -
Vora R. H.,
Krishnan P. S. G.,
Goh S. H.,
Chung T.S.
Publication year - 2001
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/1616-3028(200110)11:5<361::aid-adfm361>3.0.co;2-b
Subject(s) - kapton , polyetherimide , materials science , polyimide , dielectric , amorphous solid , trifluoromethyl , absorption (acoustics) , chemical engineering , composite material , analytical chemistry (journal) , organic chemistry , polymer , optoelectronics , chemistry , alkyl , layer (electronics) , engineering
Polyetherimides are versatile melt‐processable engineering resins. A series of fluoro‐polyetherimides compositions based on diether‐containing diamines were designed on paper and their dielectric constants (ϵ′) estimated before their synthesis. Experimentally determined ϵ′ values were compared with the estimated values. The amorphous polyetherimides containing bis‐trifluoromethyl groups exhibited not only low dielectric constants—lower than those of the commercially available polyetherimide ULTEM 1000 and polyimide Kapton H at 1 kHz—but also excellent long‐term thermo‐oxidative stability and reduced water absorption relative to non‐fluorinated polyimides.