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By K.L. Mittal

This quantity chronicles the complaints of the Symposium on Adhesion elements of Polymeric Coatings held below the auspices of the Electrochemical Society in Minneapolis, MN, may well 10-15, 1981. This occasion was once cosponsored through the Dielectric and Insulation, and Electrothermics and Metallurgy Divisions. Polymeric coatings are used for a few reasons, e. g. , ornamental, protecting, practical (as dielectrics or insulators) and a distinct software of polymeric (organic) coatings is their use as lithographic fabrics for making built-in circuit parts. regardless of the aim of the coating, it needs to adhere good to the underlying substrate. So the necessity to lower than­ stand the criteria which impression adhesion of natural coatings and the how you can reach wanted adhesion is kind of show up. This Symposium used to be designed to compile scientists and technologists attracted to the adhesion facets of polymeric coatings, to supply a discussion board for dialogue of up to date findings, and to supply a chance for cross-pollination of rules. The technical application contained a complete of forty six papers by way of authors from numerous corners of the realm. this system comprised either invited overviews and contributed unique examine papers, as this mixture is the way to current the nation of information of an issue. The invited audio system have been chosen which will signify extensively vary­ ing disciplines and pursuits and so they hailed from numerous aca­ demic and commercial study laboratories.

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Extra resources for Adhesion Aspects of Polymeric Coatings

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The knowledge obtained through the studies of composites can be applied to organic coatings and adhesive joints provided that the geometrical factors are taken into consideration. INTRODUCTION Interest in composites ranging from high-performance composites to ordinary particulate-filled composites are rising faster than ever~ due to the conservation efforts of raw materials~ economic advantages and new requirements for advanced materials. A noteworthy trend has been the effort in developing methods to produce better composites made with particulate fillers which have been historically considered non-reinforcing.

Surface, the penetration of adhesive into the pores must be beneficial. As Bascom says "the resin-metal oxide composite interphase would contribute significantly to bond durability"78. ROLE OF SURFACE TOPOGRAPHY 35 Figure 6. 55 Figure 7. Scanning electron micrograph of the surface of copper oxidized at 90 0 e in "Ebonol e" solution for 10 minutes. 91 36 D. E. -. ~ . -. "uce" 011:10. 10 20 30 cnpper oxidation Ii me (minutes) IJJ Figure 8. Adhesion of polyethylene to copper oxidized in alkaline chlorite solution 91 The effect of time in oxidizing solution prior to bonding.

P Net pressure driving a liquid into a pore. Pa Atmospheric pressure. Pressure in excess of atmospheric tending to force a liquid PI into a pore. r Radius of pore. t Time. x Distance (along pore). xmax Maximum penetration of a polymer liquid into a pore, limited by its setting. Distance penetrated by a liquid into a pore in time t. D. E. PACKHAM 42 REFERENCES 1. 2. 3a. 3b. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. C. A. Deckert and D. A. Peters, this volume.

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