Accession Number:

ADA123254

Title:

Research on Transverse Reinforcement of Bond Lines via In Situ Fiberization.

Descriptive Note:

Final rept. 26 Mar 81-15 Jul 82,

Corporate Author:

HUGHES AIRCRAFT CO EL SEGUNDO CA ELECTRO-OPTICAL AND DATA SYSTEMS GROUP

Personal Author(s):

Report Date:

1982-10-01

Pagination or Media Count:

78.0

Abstract:

The program was to investigate the utility of in situ formed polypropylene fibers as a reinforcement to increase the peel and cleavage performance of adhesively bonded joints. Specifically, phosphoric acid anodized aluminum substrates were used with the aim of producing fibers via flow induced crystallization directly in the pore structure which would extend out into and reinforce the adhesive resin. Experimental results have shown that the in situ formed polypropylene fibers do have dimensions compatible with the pore sizes of the anodic layers produced and there is some evidence to suggest that formation does take place within the pores. Further, it was demonstrated that adhesion to the polypropylene material could be enhanced by plasma treatments in particular, short time, medium power, oxygen exposures. Bonded T-peel and lap shear specimens were tested and the most promising results for fiberized specimens were in general equal to those obtained with non-fiberized control samples. Author

Subject Categories:

  • Adhesives, Seals and Binders
  • Laminates and Composite Materials
  • Textiles
  • Fabrication Metallurgy
  • Plastics
  • Couplers, Fasteners and Joints

Distribution Statement:

APPROVED FOR PUBLIC RELEASE