Effects of solvent exposures on poly(etheretherketone) (PEEK) and PEEK-fiberglass composites

Technical Report · Mon Dec 15 04:00:00 EST 1986

OSTI ID:7170555

Whitaker, R B; Brown, C R; Carlson, R S; Trainer, P D

Specimens of PEEK and PEEK-fiberglass (FG) were exposed to a number of solvents, and, after removal of the solvents, were tested for changes in weight, tensile strength, and thermal/chemical properties. Solvents tested included: Alconox/water, ethanol, trichloroethylene, ethylene glycol, toluene, Freon TF, silicone oil, and dilute (15%) NaOH and H/sub 2/SO/sub 4/ solutions. Exposures were for five days at temperatures up to 80/sup 0/C. The only significant decreases in tensile strength after solvent exposure occurred with the dilute NaOH-exposed PEEK-FG specimens. Several samples showed minor weight changes. Differential scanning calorimetry showed that the ability of the solvent-exposed PEEK or PEEK-FG recrystallize was not affected, except in concentrated H/sub 2/S/sub 4/ (greater than or equal to65 wt %) solutions. Similarly, infrared (ir) spectroscopic analyses showed no changes in solvent-exposed PEEK or PEEK-FG, except in greater than or equal to85% H/sub 2/SO/sub 4/, where minor changes in the ir spectrum were observed. Examination of the glass transition (Tg) region of concentrated (65%) H/sub 2/SO/sub 4/-exposed PEEK, the dilute NaOH-exposed PEEK-FG, and the dilute H/sub 2/SO/sub 4/-exposed PEEK-FG by thermomechanical and dynamic mechanical analyses showed no significant differences from unexposed controls. Similar results were obtained for alcohol- and trichloroethylene-exposed PEEK specimens. 7 figs., 9 tabs.

• Research Organization: Monsanto Research Corp., Miamisburg, OH (USA). Mound
• OSTI ID: 7170555
• Report Number(s): MLM-3405; ON: DE87004142
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360604* -- Materials-- Corrosion
Erosion
& Degradation
CALORIMETRY
COMPATIBILITY
COMPOSITE MATERIALS
FIBERGLASS
INFRARED SPECTRA
MATERIALS
MECHANICAL PROPERTIES
MOLDING MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
RECRYSTALLIZATION
RESINS
SOLVENTS
SPECTRA
SYNTHETIC MATERIALS
TENSILE PROPERTIES
THERMAL ANALYSIS
THERMOPLASTICS
WEIGHT