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I. Polymer Films for High Temperature Capacitor Applications II. Differential Electrochemical Mass Spectrometry

Treufeld, Imre
http://rave.ohiolink.edu/etdc/view?acc_num=case1465503063

Abstract Details

2016, Doctor of Philosophy, Case Western Reserve University, Chemistry.
Polycarbonate (PC)/poly(vinylidene fluoride) (PVDF) multilayer films (MLFs) with normal PC and high temperature PC (HTPC) were studied with broadband dielectric spectroscopy (BDS), electric displacement-electric field (D-E) loop, leakage current, and breakdown measurements to determine their high temperature performance and loss mechanism. The MLF containing HTPC performed better, which is attributed to its higher glass transition temperature (Tg), better maintaining interfacial polarization and providing a “blocking electrode” preventing charge carrier injection from PVDF into PC. Twelve (12) new polyimides (PIs) with nitrile (CN) groups attached to the polymer main chains were studied with BDS and D-E loop measurements. A ratio of experimental and theoretical dipolar polarization was calculated to estimate how easily the CN dipoles could rotate in response to the external electric field. Experimental results show that adding polar groups to PIs increased the permittivity but dielectric loss increased too because the dipoles in the rigid PI structures were difficult to rotate. An online mass spectrometry probe was developed for the detection of volatile reaction products and intermediates of electrochemical reactions in an aqueous solution. A wall-jet configuration was used to produce a laminar flow of electrolyte on the surface of a solid Au electrode in the center of the probe. The mass spectrometric ion current correlated well with the hydrazine oxidation current.
Lei Zhu (Advisor)
Clemens Burda (Committee Chair)
Anna Samia (Committee Member)
Geneviève Sauvé (Committee Member)
Donald Schuele (Committee Member)
206 p.
Aerospace Materials; Automotive Materials; Chemistry; Energy; Polymers
polymer multilayer film capacitor; polymer; multilayer film; BDS; broadband dielectric spectroscopy; polycarbonate; PVDF; interfacial polarization; polyimide; nitrile; D-E loop; online mass spectrometry; probe; wall-jet

Recommended Citations

Citations

  • Treufeld, I. (2016). I. Polymer Films for High Temperature Capacitor Applications II. Differential Electrochemical Mass Spectrometry [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1465503063

    APA Style (7th edition)

  • Treufeld, Imre. I. Polymer Films for High Temperature Capacitor Applications II. Differential Electrochemical Mass Spectrometry . 2016. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1465503063.

    MLA Style (8th edition)

  • Treufeld, Imre. "I. Polymer Films for High Temperature Capacitor Applications II. Differential Electrochemical Mass Spectrometry ." Doctoral dissertation, Case Western Reserve University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1465503063

    Chicago Manual of Style (17th edition)

case1465503063
389
© 2015, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.
Release 3.2.12