Fluorinated and nonfluorinated polyimides based on 4,4{double_prime}-diamino-p-terphenyl

Conference · Fri Dec 31 04:00:00 UTC 1993

OSTI ID:141681

Auman, B C ^[1]

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1. Du Pont Electronics, Wilmington, DE (United States)

The synthesis of stiff, rod-like polyimides based on rod-like 4,4{double_prime}-diamino-p-terphenyl (DATP) is described. Both fluorinated and nonfluorinated materials were prepared. Polyimide films based on DATP and standard dianhydrides, pyromellitic dianhydride and biphenyl tetracarboyxlic dianhydride, exhibited remarkably low moisture absorption; while those based on DATP and rigid, fluorinated dianhydrides, 9,9-bis(trifluoromethyl)- and 9-phenyl-9-trifluoromethyl-xanthene-2,3,6,7-tetracarboxylic dianhydrides showed low dielectric constant, but were higher in moisture absorption than expected. All four structures studied showed very low CTE typical of very stiff, rodlike materials. These materials have potential uses in electronics applications in which low CTE (for less stress), low moisture and low dielectric constant are important. Other potential uses include fibers, resins, coatings and composites.

• OSTI ID: 141681
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
40 CHEMISTRY
DIELECTRIC PROPERTIES
FLUORINATION
HYDRATION
IMIDES
ORGANIC POLYMERS
POLYMERIZATION
TERPHENYLS
THERMAL EXPANSION