Fiber finishes for improving galvanic resistance of imide-based composites

Ronald E. Allred, Richard E. Jensen, Brent W. Gordon, Thomas M. Donnellan, Theotis Williams, Roland C. Cochran, Kevin W. Miller

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

Galvanic corrosion resistant carbon/bismaleimide (BMI) composites have been demonstrated through the use of reactive finishes to form coatings that isolate the carbon fibers from the BMI matrix. A family of novel reactive coupling agents was formulated into phenolic-based finishes that react with carbon fibers and the matrix resin during processing to form chemical bonds at the interface and in the interphase. Each fiber is coated uniformly with the phenolic finish before the BMI prepregging process. The finish serves to isolate the carbon fibers from the BMI matrix and interrupts the galvanic cell. Both static measurements on galvanic corrosion couples and dynamic electrochemical impedance spectroscopy measurements show that the finishes dramatically improve composite corrosion resistance. Flexural and short beam shear strengths show that BMI matrix composites with finished fibers are equivalent to those with unsized fibers. The mechanical data is supported by voltage contrast x-ray photoelectron spectroscopy (VC-XPS) measurements and SEM failure surface analyses which show that interfacial adhesion is superior in the finished composites. This approach has the potential to substantially improve galvanic corrosion resistance of the interface in BMI matrix composites by preventing the interfacial debonding thought to be responsible for the observed reaction acceleration. The reactive finish approach provides a cost-efficient means of improving galvanic corrosion resistance in composites with any BMI formulation.

Original languageEnglish (US)
Pages (from-to)130-143
Number of pages14
JournalInternational SAMPE Symposium and Exhibition (Proceedings)
Volume43
Issue number1
StatePublished - Jan 1 1998
EventProceedings of the 1998 43rd International SAMPE Symposium and Exhibition. Part 1 (of 2) - Anaheim, CA, USA
Duration: May 31 1998Jun 4 1998

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Imides
Fibers
Composite materials
Carbon fibers
Corrosion resistance
Corrosion
Chemical bonds
Coupling agents
Debonding
Photoelectron spectroscopy
Electrochemical impedance spectroscopy
Shear strength
Carbon
Adhesion
Resins
X rays
Coatings
Scanning electron microscopy
Electric potential
Processing

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Allred, R. E., Jensen, R. E., Gordon, B. W., Donnellan, T. M., Williams, T., Cochran, R. C., & Miller, K. W. (1998). Fiber finishes for improving galvanic resistance of imide-based composites. International SAMPE Symposium and Exhibition (Proceedings), 43(1), 130-143.
Allred, Ronald E. ; Jensen, Richard E. ; Gordon, Brent W. ; Donnellan, Thomas M. ; Williams, Theotis ; Cochran, Roland C. ; Miller, Kevin W. / Fiber finishes for improving galvanic resistance of imide-based composites. In: International SAMPE Symposium and Exhibition (Proceedings). 1998 ; Vol. 43, No. 1. pp. 130-143.
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abstract = "Galvanic corrosion resistant carbon/bismaleimide (BMI) composites have been demonstrated through the use of reactive finishes to form coatings that isolate the carbon fibers from the BMI matrix. A family of novel reactive coupling agents was formulated into phenolic-based finishes that react with carbon fibers and the matrix resin during processing to form chemical bonds at the interface and in the interphase. Each fiber is coated uniformly with the phenolic finish before the BMI prepregging process. The finish serves to isolate the carbon fibers from the BMI matrix and interrupts the galvanic cell. Both static measurements on galvanic corrosion couples and dynamic electrochemical impedance spectroscopy measurements show that the finishes dramatically improve composite corrosion resistance. Flexural and short beam shear strengths show that BMI matrix composites with finished fibers are equivalent to those with unsized fibers. The mechanical data is supported by voltage contrast x-ray photoelectron spectroscopy (VC-XPS) measurements and SEM failure surface analyses which show that interfacial adhesion is superior in the finished composites. This approach has the potential to substantially improve galvanic corrosion resistance of the interface in BMI matrix composites by preventing the interfacial debonding thought to be responsible for the observed reaction acceleration. The reactive finish approach provides a cost-efficient means of improving galvanic corrosion resistance in composites with any BMI formulation.",
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Allred, RE, Jensen, RE, Gordon, BW, Donnellan, TM, Williams, T, Cochran, RC & Miller, KW 1998, 'Fiber finishes for improving galvanic resistance of imide-based composites', International SAMPE Symposium and Exhibition (Proceedings), vol. 43, no. 1, pp. 130-143.

Fiber finishes for improving galvanic resistance of imide-based composites. / Allred, Ronald E.; Jensen, Richard E.; Gordon, Brent W.; Donnellan, Thomas M.; Williams, Theotis; Cochran, Roland C.; Miller, Kevin W.

In: International SAMPE Symposium and Exhibition (Proceedings), Vol. 43, No. 1, 01.01.1998, p. 130-143.

Research output: Contribution to journalConference article

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AU - Miller, Kevin W.

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N2 - Galvanic corrosion resistant carbon/bismaleimide (BMI) composites have been demonstrated through the use of reactive finishes to form coatings that isolate the carbon fibers from the BMI matrix. A family of novel reactive coupling agents was formulated into phenolic-based finishes that react with carbon fibers and the matrix resin during processing to form chemical bonds at the interface and in the interphase. Each fiber is coated uniformly with the phenolic finish before the BMI prepregging process. The finish serves to isolate the carbon fibers from the BMI matrix and interrupts the galvanic cell. Both static measurements on galvanic corrosion couples and dynamic electrochemical impedance spectroscopy measurements show that the finishes dramatically improve composite corrosion resistance. Flexural and short beam shear strengths show that BMI matrix composites with finished fibers are equivalent to those with unsized fibers. The mechanical data is supported by voltage contrast x-ray photoelectron spectroscopy (VC-XPS) measurements and SEM failure surface analyses which show that interfacial adhesion is superior in the finished composites. This approach has the potential to substantially improve galvanic corrosion resistance of the interface in BMI matrix composites by preventing the interfacial debonding thought to be responsible for the observed reaction acceleration. The reactive finish approach provides a cost-efficient means of improving galvanic corrosion resistance in composites with any BMI formulation.

AB - Galvanic corrosion resistant carbon/bismaleimide (BMI) composites have been demonstrated through the use of reactive finishes to form coatings that isolate the carbon fibers from the BMI matrix. A family of novel reactive coupling agents was formulated into phenolic-based finishes that react with carbon fibers and the matrix resin during processing to form chemical bonds at the interface and in the interphase. Each fiber is coated uniformly with the phenolic finish before the BMI prepregging process. The finish serves to isolate the carbon fibers from the BMI matrix and interrupts the galvanic cell. Both static measurements on galvanic corrosion couples and dynamic electrochemical impedance spectroscopy measurements show that the finishes dramatically improve composite corrosion resistance. Flexural and short beam shear strengths show that BMI matrix composites with finished fibers are equivalent to those with unsized fibers. The mechanical data is supported by voltage contrast x-ray photoelectron spectroscopy (VC-XPS) measurements and SEM failure surface analyses which show that interfacial adhesion is superior in the finished composites. This approach has the potential to substantially improve galvanic corrosion resistance of the interface in BMI matrix composites by preventing the interfacial debonding thought to be responsible for the observed reaction acceleration. The reactive finish approach provides a cost-efficient means of improving galvanic corrosion resistance in composites with any BMI formulation.

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Allred RE, Jensen RE, Gordon BW, Donnellan TM, Williams T, Cochran RC et al. Fiber finishes for improving galvanic resistance of imide-based composites. International SAMPE Symposium and Exhibition (Proceedings). 1998 Jan 1;43(1):130-143.