Adhesion study of thermoplastic polyimides with Ti-6Al-4V alloy and PEEK-graphite composites

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1991

OSTI ID:7039393

Yoon, Taeho

High glass transition (e.g. 360C) melt processable thermoplastic polyimide homopolymers and poly(imide-siloxane) segmented copolymers were prepared from a number of diamines and dianhydrides via solution imidization, polydimethylsilxane segment incorporation and molecular weight control with non-reactive phthalimide end-groups. The adhesive bond performance of these polyimides was investigated as a function of molecular weight, siloxane incorporation, residual solvent, test temperature, and polyimide structure via single-lap shear samples prepared from treated Ti-6Al-4V alloy adherends and compression-molded film adhesives of scrim-cloth adhesives. The adhesive bond strengths increased greatly with siloxane-segment incorporation at 10, 20 and 30 wt% and decreased slightly with total polymer molecular weight. As the test temperature was increased, adhesive bond strength increased, decreased or showed a maximum at some temperatures depending on the polyimide structure and siloxane content. The poly(imide-30% siloxane) segmented copolymer and a miscible poly(ether-imide) also demonstrated excellent adhesive bond strength with poly(arylene ether ketone) PEEK{reg sign}-graphite composites.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)
• OSTI ID: 7039393
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360603* -- Materials-- Properties
ADHESION
ALLOYS
ALUMINIUM ALLOYS
BONDING
CARBON
COMPOSITE MATERIALS
ELEMENTAL MINERALS
ELEMENTS
FABRICATION
GRAPHITE
IMIDES
JOINING
MATERIALS
MINERALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
ORGANIC SILICON COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
SILOXANES
SYNTHETIC MATERIALS
THERMOPLASTICS
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS