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A study of polymeric corrosion inhibitors for copper

Hansen, Joan Elizabeth
http://rave.ohiolink.edu/etdc/view?acc_num=case1057601491

Abstract Details

1994, Doctor of Philosophy, Case Western Reserve University, Macromolecular Science.
Imidazoles are effective corrosion inhibitors for copper under a variety of environments. This work is concerned with the study of poly-N-vinylimidazole (PVI). Reflection-absorption infrared spectroscopy (RAS) and x-ray photoelectron spectroscopy (XPS) combined with Ar+ ion sputtering is used to study the oxidation of PVI inhibitor films on copper. PVI films cast on copper coupons remain stable up to 200°C for 15 minutes. However, infrared bands relating to the thermal oxidation of the imidazole ring are identified in films heated at 300°C. Nitrile formation is also detected. Nitrile functionality results due to the cleavage of the imidazole ring. Ring cleavage is followed by oxidation and eventual scission of the polymer chain. Cupric oxide (CuO) is also identified in this spectrum. XPS is used to confirm the presence of CuO on the surface of the degraded polymer. XPS depth profiling analysis shows that the oxide was located on top of the polymer film. Cuprous species are also detected in the film. The exact mechanism of copper ion migration could not be ascertained from this work. The effect of humidity on PVI films cast on copper is also studied. Water helped to wick copper through the film. XPS high resolution scans confirm the presence of copper on the film surface. Auger maps of the humidified PVI films showed that copper is distributed throughout the film surface. Depth profiling analysis indicates that the concentration of copper increases with increasing sputter depth. Infrared studies show that the water was interacting with the pyridine-like nitrogen of the imidazole ring. Measurements of the glass transition temperature (Tg) of the polymer indicate that the water acts as a plasticizing agent. Copolymers of N-vinylimidazole and methacryloxypropyltrimethoxy silane were synthesized. Studies of these copolymers on copper indicate that the silane acts as a scavenger for the water released by the imidazole ring during heating. As a result, less oxidative degradation is seen as compared to PVI films on copper.
Hatsuo Ishida (Advisor)
253 p.
Chemistry, Polymer
polymeric corrosion inhibitor copper

Recommended Citations

Citations

  • Hansen, J. E. (1994). A study of polymeric corrosion inhibitors for copper [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1057601491

    APA Style (7th edition)

  • Hansen, Joan. A study of polymeric corrosion inhibitors for copper. 1994. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1057601491.

    MLA Style (8th edition)

  • Hansen, Joan. "A study of polymeric corrosion inhibitors for copper." Doctoral dissertation, Case Western Reserve University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=case1057601491

    Chicago Manual of Style (17th edition)

case1057601491
963
© 1994, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.