Low coefficient of thermal expansion polyimides containing metal ion additives

Journal Article · Wed Jul 01 00:00:00 EDT 1992 · SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (United States)

OSTI ID:7241801

Stoakley, D M; Clair, A K ^[1]

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1. NASA Langley Research Center, Hampton, VA (United States)

Polyimides have become widely used as high performance polymers as a result of their excellent thermal stability and toughness. However, lowering their coefficient of thermal expansion (CTE) would increase their usefulness for aerospace and electronic applications where dimensional stability is a requirement. The CTE's of conventional polyimides range from 30 to 60 ppm/C. Approaches that have been reported to lower their CTE's include linearizing the polymer molecular structure and orienting the polyimide film. This current study involves the incorporation of metal ion-containing additives into polyimides and has resulted in significantly lowered CTE's. Various metal ion additives have been added to both polyamic acid resins and soluble polyimide solutions in the concentration range of 4-23 weight percent. The incorporation of these metal ions has resulted in reductions in the CTE's of the control polyimides of 12% to over 100% depending on the choice of additive and its concentration.

• OSTI ID: 7241801
• Journal Information: SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (United States), Vol. 23:4; ISSN 0036-0821
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
METALLURGICAL EFFECTS
DYSPROSIUM
ERBIUM
EUROPIUM
HOLMIUM
IMIDES
THERMAL EXPANSION
LUTETIUM
POLYMERS
SILVER
TERBIUM
THULIUM
TIN
ADDITIVES
ALUMINIUM COMPLEXES
DYSPROSIUM CHLORIDES
DYSPROSIUM FLUORIDES
ERBIUM CHLORIDES
ERBIUM COMPLEXES
ERBIUM SULFIDES
EUROPIUM COMPLEXES
EXPERIMENTAL DATA
HOLMIUM CHLORIDES
HOLMIUM SULFIDES
LUTETIUM FLUORIDES
METALS
MOLECULAR STRUCTURE
OPTIMIZATION
QUANTITY RATIO
SILVER NITRATES
TERBIUM CHLORIDES
TERBIUM COMPLEXES
TERBIUM FLUORIDES
TERBIUM SULFIDES
THULIUM CHLORIDES
TIN CHLORIDES
CHALCOGENIDES
CHLORIDES
CHLORINE COMPOUNDS
COMPLEXES
DATA
DYSPROSIUM COMPOUNDS
ELEMENTS
ERBIUM COMPOUNDS
EXPANSION
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HOLMIUM COMPOUNDS
INFORMATION
LUTETIUM COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
RARE EARTH COMPLEXES
RARE EARTH COMPOUNDS
RARE EARTHS
SILVER COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
TERBIUM COMPOUNDS
THULIUM COMPOUNDS
TIN COMPOUNDS
TIN HALIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
360606* - Other Materials- Physical Properties- (1992-)